KR100863573B1 - Quad Refiller Spiral Antenna Structure - Google Patents

Abstract

The present invention is to provide a quad refiller spiral antenna structure, the pillar (10); A pillar upper plate portion 12 formed on the pillar 10; A first radiating element (13) formed on the pillar (10); The second radiation is formed in the column upper plate portion 12, one end is electrically connected to the first radiating element 13, the other end is open to each other to form an open QHA antenna (1) Element 15; And an impedance improving unit 17 electrically connected to the first radiating element 13 and formed on the pillar 10 to combine the two radiating elements to form a miniaturized and feeder substrate portion. By connecting the branch grounded to the first radiating element to improve the input impedance of the antenna it is possible to compensate for the radiation pattern, radiation efficiency, axial ratio, antenna gain that is degraded due to miniaturization.

QHA, Helical, GPS, RFID, Satellite, DMB, Antenna, Ceramic

Description

Quadrifilar Helical or Spiral Antenna

1 is a structural diagram of a patch antenna for a conventional satellite communication.

2 is a structural diagram of a conventional helical antenna.

3 is a structural diagram of a conventional QHA antenna.

4 is a schematic diagram of a conventional QHA antenna.

5 is a perspective view showing the configuration of a conventional QHA antenna.

Figure 6 is a perspective view showing a 1/4 or 3/4 wavelength quad refiller spiral antenna structure using a ceramic circular cylinder according to an embodiment of the present invention.

7 is a perspective view illustrating a 1/2 or 1 wavelength quad refiller spiral antenna structure using a ceramic circular cylinder according to an embodiment of the present invention.

8 is a diagram illustrating various configuration examples of the pillar in FIGS. 6 and 7.

FIG. 9 is a view illustrating various configuration examples of the pillar and the first radiating element in FIGS. 6 and 7.

FIG. 10 is a view illustrating various configuration examples of the first radiating element in FIG. 9.

FIG. 11 is a view illustrating various configuration examples of the pillar and the second radiating element in FIGS. 6 and 7.

12 is a view illustrating various configuration examples of the second radiating element in FIG. 11.

FIG. 13 illustrates an example in which the second radiating element is configured to be inverted left and right in FIG. 12.

14A to 14H are perspective views illustrating quadrefill spiral antenna structures having various structures according to FIG. 6.

15A to 15D are perspective views illustrating quadrefill spiral antenna structures having various structures according to FIG. 7.

16 is a view showing an example of the configuration of the pillar portion, the first radiating element, the feeder substrate portion in FIGS.

FIG. 17 is a view illustrating a structure of feeding power to the upper plate in FIGS. 6 and 7.

<Description of Symbols for Main Parts of Drawings>

1: open QHA structure

10: pillar 12: pillar top plate

13: first radiating element 15: second radiating element

17 impedance improving unit 19 feeder substrate unit

2: shorted QHA structure

20: pillar 22: pillar top plate

23: first radiating element 25: second radiating element

27: impedance improving portion 29: feeder substrate portion

30: pillar (when filled) 30A: pillar (if hollow)

4: QHA structure 4A: QHA structure

4B: Top Feeding 4C: Bottom Feeding

40A to 40C: pillar 43A to 43H: first radiating element

46A: feeder

50, 52A: (various) column 52: column top plate

55: second radiating element (when one end is connected to each other)

55A: second radiating element (when one end is open to each other)

59, 59A: feeder substrate portion

7: quad refiller antenna 7A: quad refiller antenna

70: pillar (dielectric, substrate, ceramic) 70A: pillar (plastic injection)

73: first radiation element (pattern printing)

73A: first radiating element (wire or press antenna)

74 contact portion (solder) 79 feeder substrate portion

79A: Ground part (GND) 79B: Feeder circuit part

79C: LNA ground portion 79D: LNA circuit portion

80: pillar 82: pillar upper plate

83: first radiating element 85: second radiating element

87: impedance improvement unit 88: secondary feeder unit

88A: first feed point 88B: second feed point

89: primary feeder

[1] Kilgus, C.C, "Multielement Fractional Turn Helices", IEEE Trans. Antennas and Propagation, Vol. AP-16, No. 4, July PP. 400-501 (1968)

[2] Kilgus, C.C, "Resonant Quadrifilar Helix", IEEE Trans. Antennas and Propagation, Vol. AP-17, No. 3, May PP. 349-351 (1969)

[3] Bricker, R. W., "A Shaped Beam Antenna for Satellite Data Communication", IEEE AP-S Int. Symp. Digest, October pp. 121-126 (1976)

[4] Patton, W.T., "The Backfire Bifilar Helical Antenna", Antenna Laboratory Resort 61, AD 289084, Univ. of Illinois, Urbana, IL, September 1962

[5] Kilgus, C.C, "Resonant Quadrifilar Helix Design", Microwave Journal, Vol. 13, No. 12, December pp. 49-54 (1970)

[6] Adam, A.T, R.K. Greenough, R. F. Wallenberg, A. Mendlovics, and C. Lumjiak, "The Quadrifilar Helix Antenna", IEEE Trans. Antennas and Propagation, Vol. Ap-22, no. 2, March pp. 173-178 (1974)

[7] Korean Intellectual Property Office Application No. 20-2006-0003127 (filed February 02, 2006), "Antenna module for satellite communication in mobile wireless communication device"

[8] Korean Intellectual Property Office Application No. 10-2004-0014926 (Application Date: March 05, 2004), "Antenna for Portable Wireless Communication Device"

[9] Korean Intellectual Property Office Application No. 10-2000-7008943 (Application date: August 16, 2000), "Adaptive multi-pillar antenna"

[10] Korean Intellectual Property Office Application No. 10-2002-7003119 (filed March 08, 2002), "Adaptive multi-pillar antenna"

[11] Korean Intellectual Property Office Application No. 10-2005-0067681 (filed July 26, 2005), "Handset Quadreplier Spiral Antenna Mechanical Structures"

[12] Korean Intellectual Property Office Application No. 10-2005-0022253 (filed March 17, 2005), "Antenna with four spiral radiator structures"

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a quadruple spiral antenna (QHA) antenna structure. In particular, two radiating elements are combined to achieve miniaturization, and a branch whose end is grounded to the feeder substrate is connected to the first radiating element. Therefore, the present invention relates to a quad refiller spiral antenna structure suitable for compensating for the radiation pattern, radiation efficiency, axial ratio, and antenna gain, which are reduced due to miniaturization by improving the input impedance of the antenna.

In general, the satellite, broadcasting, telecommunications, and internet industries are exploding, and are becoming the core medium of the information society in the 21st century. The satellite broadcasting receiving equipment industry has already been developed, including satellite antennas, which is particularly prominent in the recent fields of global positioning system (GPS) and satellite digital multimedia broadcasting (DMB). . In addition, with the development of semiconductors and the development of communication technologies, as the size of the device becomes smaller and lighter, its application range becomes wider, and its use such as GPS and DMB reception functions in vehicles as well as personal portable devices is becoming more common.

1 is a structural diagram of a patch antenna for a conventional satellite communication.

Thus, as a representative example of an antenna for receiving a conventional satellite signal, a patch antenna refers to an antenna having a planar shape, as shown in FIG.

This conventional method is advantageous in that it is small, light, inexpensive, and easy to integrate, but due to the characteristics of the directional antenna, the front of the antenna should always be installed upward to receive satellite signals. There was a disadvantage that there are many installation restrictions, such as to be mounted. This installation limitation has a limitation in design application, and when carrying, there is a problem that the reception level may drop due to friction, accessories, and mounting positions.

What has emerged as an antenna to compensate for this problem is a QHA (Quadrifilar Helix Antenna) using a conventional helix antenna.

2 is a structural diagram of a conventional helical antenna.

As shown, the helical antenna refers to an antenna which is wound around a coil 21 having a spring shape electrically having a length of λ / 4, and connects a spiral conductor to the center conductor of the coaxial feeder and connects the coaxial cable 23 The outer conductor is an antenna connected to the ground plane 25. Helical antenna has the advantage that can be implemented in a much smaller size than the dipole antenna and monopole antenna at the same frequency.

3 is a structural diagram of a conventional QHA antenna.

QHA type antennas are a type of antenna used for satellite communication in mobile wireless communication devices such as mobile terminals or GPS receivers. The antenna provides circularly polarized radiation and can be designed to have a quarter-wave or half-wavelength structure with shorted ends. Referring to the drawings, the QHA forms the ground section 35 to form the feed section 31 and the short circuit section 37 and to electrically connect therebetween. Comprising four radiating elements 33 electrically connected to one side of the feed section and the short circuit section, the feed section is arranged to feed the four radiating elements with a phase difference of 90 degrees to provide a circularly polarized radiation pattern .

1 to 3 are contents described in the prior art document information [7] (hereinafter, only the document number is described).

The quad refiller antenna is an electrical microantenna for providing circular polarization in a broad angular region. The antenna generally consists of four Helices, each Helix placed equally on the circumferential surface of the dielectric cylinder or any dielectric disk support, with four equally applied signals of four phases each Is fed. The quad refiller can also be described as two orthogonal bifilars fed in four phases, where the bifilar is a two-element helical antenna.

Quad-refiller antennas have been developed by many researchers, Kilgus proposed a half-turn current distribution, and the half-wavelength quadrifilar is similar to the current distribution of loop dipole antennas ([1], [2]. From this interpretation, Kilgus derives an equation describing the normalized radiant field and presents circular polarizations that exist outside of the sphere ([2]).

In the QHA, dielectric support pieces are important. Cylindrical foam, hollow dielectric tubes, or periodic dielectric spacers are used to support helical devices. These dielectric materials must have low loss tangent and low permittivity to meet the phase velocity required for radiation ([3]).

Quad refiller helix feeds from 1) top and 2) bottom. In case 1), the helix element is fed at the top and these elements are shorted at the bottom above the ground plane. Electromagnetic radiation radiates towards the feed point and this arrangement is called backfire quadrifilar helix. Patton showed that as the backfire bifilar creates a conical beam and the size of the antenna increases, the beam is scanned from the backfire to the broadside and the front-to-back ratio drops to unity when the number of turns decreases to 1 (4). Kilgus provided a design technique for short backfire quadrifilar helices. [5] When powered from the bottom, the quadrefill helical antenna feeds toward the ground plane, radiates forward and radiates it forward- Called fire quadrifilar helix. Adam provided design data for this ([6]).

Referring to the technology filed for such a QHA antenna as follows.

FIG. 3 shows the structure of a quad refiller helix antenna proposed in "Antenna for Mobile Radio Communication Device" of [8].

Thus comprising four radiating elements 33 for forming a quarter-wave quad refiller helix structure, each of the radiating elements 33 being arranged for electrical connection to a wireless circuit of a portable radio communication device. At one end, each of the radiating elements 33 is at a second end facing the first end electrically connected to a corresponding second end of the other three radiating elements, thereby providing four radiating elements 33 An antenna unit for a portable radio communication device which forms a short circuit 37 for the field, wherein the quadrefiller helix structure is arranged between the ground and the short circuit 37 for electrical connection to the portable radio communication device. It characterized in that it comprises a grounding portion 35 is arranged coaxially along the inside of.

Fig. 4 is a schematic diagram of a conventional QHA antenna, which is described in "Adaptive multi-pillar antenna" of [9] and "Adaptive multi-pillar antenna" of [10].

The QHA thus comprises four helical filaments (10-40) and eight radial filaments (50-120). (In another embodiment, a spiral filament spaced at six angles may be used, and a spiral filament spaced at even angles may be used.) The spiral filaments are twisted as shown in FIG. (intertwined) and are disposed about the longitudinal axis of the antenna at 90 degrees to each other. Four radial filaments (50 to 80) are placed on the top and 90 to 120 are placed on the bottom of the spiral to connect with the spiral filaments and form two bifilar loops. The antenna is fed to a set of radial filaments 90, 110 with a 90 degree phase difference between the two feeds. The radial filaments 50-80 at the top of the antenna for the feed may be a circuit that is partially shorted or open depending on the resonant length of the helical filament and the required response.

Fig. 5 is a perspective view showing the structure of a conventional QHA antenna, which is described in "Handset Quadreplier Spiral Antenna Mechanical Structures" in [11] and "Antenna with Four Spiral Radiator Structures" in [12].

Thus, it includes filler windings 12, 14, 16, and 18 that extend from the lower portion 20 to the upper portion 22 of the QHA 10 having a cylindrical shape. FIG. 5 shows that the fillers 12, 16 arranged in opposite positions are electrically connected by the conductive bridge 23 and the pillars 14, 18 are electrically connected by the conductive bridge 24. QHA is indicated. The signal propagating through the filler 12/16 has a quadrature phase relationship with the signal propagating through the filler 14/18 to produce the desired circular signal polarization. Each of the pillars 12, 14, 16, 18 comprises a conductive element such as a conductor having a circular or rectangular cross section or a wire having conductive lines or lines on the dielectric.

Conductive bridges are used with QHA having a filler length equal to an even multiple of one-quarter wavelength at the operating frequency, but are not generally used when the length of the filler includes an odd multiple of one-fourth wavelength. Each conductive bridge 23, 24 (also referred to as a crossbar) comprises a conductive tape strip.

As such, the conventional QHA has a spotlight in the fields of satellite radio or satellite mobile phone system because it is physically small and light, so that it is easy to apply to a portable satellite communication device and the price is low.

QHA is particularly advantageous for satellite communication systems because it exhibits a radiation pattern with higher antenna gain when the satellite is between the ceiling and the horizon.

In order for QHA to emit excellent circular polarization, a relatively accurate orthogonal signal must be applied, and for this, a feeding network with excellent performance is required.

And quadrefiller spiral antennas are used in communication and navigation receivers operating in the UHF, L and S frequency bands. According to the shape of the spiral, there is a Qadri (Quadrifilar Helixal Antenna) or a QSA (Quadrifilar Sprial Antenna). Resonant QHA with limited bandwidth is used as antenna for GPS, XM radio, Sirius, satellite DMB, and UHF-RFID reader. QHA has a relatively small size good circular polarization coverage and low axial ratio over most of the upper hemisphere. Since QHA is a resonant antenna, its magnitudes are typically chosen to provide optimal performance for narrowband frequencies.

However, in order to apply such quadrefill spiral antennas to a portable terminal, a miniaturized QHA antenna is required. A problem due to the miniaturization of the antenna is that radiation pattern, radiation efficiency, axial ratio, and antenna gain are reduced.

Accordingly, the present invention has been proposed to solve the conventional problems as described above, and an object of the present invention is to combine the two radiating elements to achieve miniaturization and to connect the branch grounded to the feeder substrate to the first radiating element. By improving the input impedance of the antenna to provide a quad refiller spiral antenna structure that can compensate for the radiation pattern, radiation efficiency, axial ratio, antenna gain reduced due to miniaturization.

Quad refiller spiral antenna structure according to an embodiment of the present invention to achieve the above object, the pillar; A pillar upper plate formed on the pillar; A first radiating element formed on the pillar; A second radiating element formed on the pillar upper plate, one end of which is electrically connected to the first radiating element, and the other end of which is open to each other to form an open QHA antenna; And an impedance improvement unit electrically connected to the first radiating element and formed in the pillar.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention, a quadrefill spiral antenna structure as described above in detail as follows. In the following description of the present invention, detailed descriptions of well-known functions or configurations will be omitted if it is determined that the detailed description of the present invention may unnecessarily obscure the subject matter of the present invention. In addition, terms to be described below are terms defined in consideration of functions in the present invention, which may vary according to intention or precedent of a user or an operator, and thus, the meaning of each term should be interpreted based on the contents throughout the present specification. will be.

First of all, the present invention achieves miniaturization by combining two radiating elements, and connects a branch whose tip is grounded to the feeder substrate to the first radiating element to improve the input impedance of the antenna. This is to compensate for the antenna gain.

Such a quad refiller spiral antenna structure of the present invention is a mobile phone, Radio Frequency IDentification (RFID), Global Positioning System (GPS), Satellite Digital Broadcasting (DMB), Personal Digital Assistant (PDA), Personal Computer (PC), Applied to liquid crystal display (LCD) navigation terminals.

Now, a first embodiment of the present invention will be described with reference to FIG. A filler with an open end of an antenna for a portable device includes a quadrefill helical antenna structure having a length of approximately one quarter wavelength or three quarters of the transmission frequency. This will be referred to as an open QHA structure below.

The open QHA structure 1 includes a feeder substrate portion 19, a pillar 10, a first radiating element 13 implemented on the side of the pillar, a pillar top portion 12, and a second radiating element implemented on the pillar top portion. It is formed as (15).

The feeder substrate portion 19 is formed of a feeding circuit portion for feeding the first radiating element 13 clockwise or counterclockwise with a phase difference of 90 degrees, and a matching circuit portion for impedance matching between the antenna radiating element and the feeding circuit.

The pillar 10 may have various shapes such as a circle, a square, a polygon, and the like, and may have various media such as a dielectric, a substrate, and a ceramic, or do not directly form a pillar having a specific media such as the dielectric. By forming a variety of shapes such as the circular, square, polygonal, etc. only by the combination of the second magnetic shield element, and the inside of the space formed only by the combination of the first magnetic shield element and the second magnetic shield element may be made of air.

The pillar top portion 12 may have various shapes such as a circle, a square, a polygon, and the like, and may have various media such as a dielectric, a substrate, and ceramics, or do not directly form a pillar top portion having a specific medium such as the dielectric and the like. By forming various shapes such as the circular, square, polygonal, etc. by only combining the magnetic shielding element and the second magnetic shielding element, the interior of the space formed only by the coupling of the first magnetic shielding element and the second magnetic shielding element may be made of air.

The first radiating element 13 is electrically connected to the second radiating element 15. The first radiating element 13 and the second radiating element 15 may be implemented in various forms such as straight lines, diagonal lines, spirals, and the like, and are not limited to the embodiments described herein.

An impedance improving unit 17 which improves the input impedance of the antenna to the first radiating element 13 makes a branch in the first radiating element 13 so that the end thereof is electrically connected to the ground of the feeder substrate part 19. Connected. The impedance of the antenna is changed depending on the length, width, and contact position of the impedance improving unit 17 with the first radiating element 13.

In the open QHA structure 1 of the present invention, the length of the first radiating element 13 is changed, the dielectric constant or thickness of the circular pillar 10 is changed, the length of the second radiating element 15 is changed, or the pillar is The frequency of the antenna may be adjusted by changing the dielectric constant and thickness of the upper plate 12 or by changing the length, width, and contact position of the impedance improving unit 17.

Next, a second embodiment of the present invention will be described with reference to FIG. The filler with the short end of the portable antenna includes a quadrefill helical antenna structure having a length of approximately one half wavelength or one wavelength of the transmission frequency. This will be referred to as the QHA structure shorted below.

The shorted QHA structure 2 is formed of the feeder substrate portion 29, the pillar 20, the first radiating element 23 implemented on the side of the pillar, the pillar upper plate portion 22, and the pillar upper plate portion 22. It is formed as two radiating elements 25. The feeder substrate portion 29 is formed of a feeding circuit portion for feeding the first radiating element 23 clockwise or counterclockwise with a phase difference of 90 degrees, and a matching circuit portion for impedance matching between the antenna radiating element and the feeding circuit. The pillar 20 may have various shapes such as a circle, a square, a polygon, and the like, and may have various media such as a dielectric, a substrate, and ceramics, or do not directly form a pillar having a specific media such as the dielectric. By forming a variety of shapes such as the circular, square, polygonal, etc. only by the combination of the second magnetic shield element, and the inside of the space formed only by the combination of the first magnetic shield element and the second magnetic shield element may be made of air. The pillar upper plate part 22 may have various shapes such as a circle, a square, a polygon, and the like, and may have various media such as a dielectric, a substrate, and ceramics, or do not directly form a pillar upper plate having a specific medium such as the dielectric and the like. By forming various shapes such as the circular, square, polygonal, etc. by only combining the magnetic shielding element and the second magnetic shielding element, the interior of the space formed only by the coupling of the first magnetic shielding element and the second magnetic shielding element may be made of air.

One end of the second radiating element 25 is connected to the first radiating element 23 and the other end thereof to each other. The first radiating element 23 and the second radiating element 25 may be implemented in various forms such as a straight line, an oblique line, a spiral, and the like, and are not limited to the embodiments described herein.

An impedance improving unit 27 for improving the input impedance of the antenna to the first radiating element 23 is branched from the first radiating element 23, and an end thereof is electrically connected to the ground part of the feeder substrate part 29. The impedance of the antenna is changed according to the length, width, and contact position of the impedance improving unit 27 and the first radiating element 23.

In the shorted QHA structure 2 of the present invention, the length of the first radiating element 23 is changed, the dielectric constant or thickness of the circular pillar 20 is changed, or the length of the second radiating element 25 is changed, The frequency of the antenna can be adjusted by changing the dielectric constant and thickness of the pillar upper plate part 22 or by changing the length, width, and contact position of the impedance improving part 27.

The antenna impedance improving units 17 and 27 of the present invention may be implemented in various forms with one end connected to the first radiating elements 13 and 23 and the other end grounded to the feeder substrate units 19 and 29. It is possible to, but is not limited to the embodiments described herein.

FIG. 8 shows various structures of pillars, and has various shapes such as circle, rectangle, cone, polygonal pyramid, and is filled with dielectric, air, ceramic (30) and hollow (30A) implemented with dielectric, ceramic, or substrate. Include all of them.

9 and 10 illustrate various structures of the first radiating elements 43A to 43H implemented on the side surfaces of the various pillars 40A, 40B, and 40C. Basically, it consists of four pillars, and the signal which has a phase difference of 0 degree, 90 degree, 180 degree, and 270 degree clockwise and counterclockwise is input from the power feeding part 46A, respectively. The feed portion 46A of the first radiating element can be fed from the top plate of the column 4B or from the bottom plate of the column 4C.

11 to 13 illustrate various structures of the second radiating elements 55 and 55A implemented on the upper plates of the various pillars 50 and 52A. It basically consists of four pillars, each of which is electrically connected to the first radiating element. 12 and 13, the other end of the four pillars may be connected to each other 55 and open to each other 55A. The four pillars are arranged clockwise or counterclockwise depending on the direction of the polarization. 12 illustrates an example of a counterclockwise direction, and FIG. 13 illustrates an example of a clockwise direction.

14A to 14G and 15A to 15D respectively illustrate various types of quad refiller spiral antenna structures. The winding direction of the first and second radiating elements may be both clockwise and counterclockwise. Shapes vary in their implementation, including vertical, oblique, spiral, and partially curved shapes. On the bottom and top of the column, a double-sided or multilayer printed circuit board (PCB), low temperature co-fired ceramic (LTCC) or antenna feeder in the form of a semiconductor, and a matching circuit are formed.

FIG. 16 illustrates the implementation of the pillars 70 and 70A, the first radiating element 73 and the feeder substrate unit 79 when the quad refiller antennas 7 and 7A are implemented. In the case of implementing the antenna using a pattern printing technique (7), the first radiating element 73 is implemented by pattern printing on the pillar 70 composed of a dielectric, a ceramic, and a substrate. In the case of pattern printing, the bottom portion of the antenna is implemented in an L shape, so that the soldering antenna pattern 73A is placed on the lower portion of the pillar so as to automatically or manually solder the 74 to the feeder substrate portion 79. In the case of implementing the antenna pattern by using wire or by pressing (7A), the pillar 70A is implemented in the form of plastic injection supporting the antenna processed by wire or press, and the bottom of the antenna is implemented in the vertical form. To be automatically or manually soldered 74 to the feeder substrate portion 79.

The feeder substrate portion 79 is implemented using a multilayer substrate, and the feeder circuit portion 79B and the low noise amplifier (LNA) circuit portion 79D are implemented on one substrate. In the multilayer board, a ground portion 79A including a contact portion 74 with an antenna is implemented on the top layer, and is composed of a feeder circuit portion 79B, an LNA ground portion 79C, and an LNA circuit portion 79D.

17 shows a structure of feeding power from the top plate. In order to feed the power from the top plate by placing a multi-layer substrate inside the pillar to implement the secondary feeder unit 88 and the antenna matching unit. In the case of the structure feeding from the upper plate, the feed signal is applied to the first radiating element 83 through the second radiating element 85. In this case, the shape of the second radiating element 85 may be various shapes of the second radiating element 55A having the open ends of FIGS. 12 and 13. In this case, the feeding may be performed at 0 degrees, 90 degrees, 180 degrees, It is applied clockwise or counterclockwise according to polarization at 270 degrees. The impedance improving part 87 is branched from the second radiating element 85 and connected to the secondary feeder part 88.

The entire feeder unit is implemented through the primary feeder unit 89 and the secondary feeder unit 88 in the interior of the pillar 80. The signal fed from the secondary feeder unit 88 is applied to the second radiating element 85 of the column upper plate portion 82 through the second feed point 88B, which is in turn applied to the first radiating element 83. Is applied. The signal at the primary feeder unit 89 is applied to the secondary feeder unit 88 via the first feed point 88A.

As described above, the present invention achieves miniaturization by combining two radiating elements, and connects a branch whose end is grounded to the feeder substrate to the first radiating element to improve the input impedance of the antenna, thereby reducing radiation pattern, radiation efficiency, and reduction ratio. The antenna gain is then compensated for.

As described above, the quadruple spiral antenna structure according to the present invention achieves miniaturization by combining two radiating elements and improves the input impedance of the antenna by connecting a branch whose end is grounded to the feeder substrate to the first radiating element. Therefore, due to the miniaturization, there is an effect of compensating for the reduced radiation pattern, radiation efficiency, axial ratio, and antenna gain.

Although the above has been described as being limited to the preferred embodiment of the present invention, the present invention is not limited thereto and various changes, modifications, and equivalents may be used. Therefore, the present invention can be applied by appropriately modifying the above embodiments, it will be obvious that such application also belongs to the scope of the present invention based on the technical idea described in the claims below.

Claims (44)

Pillar 10; A pillar upper plate portion 12 formed on the pillar 10; A first radiating element (13) formed on the pillar (10); The second radiation is formed in the column upper plate portion 12, one end is electrically connected to the first radiating element 13, the other end is open to each other to form an open QHA antenna (1) Element 15; And An impedance improving unit 17 electrically connected to the first radiating element 13 and formed in the pillar 10; Quadrefill spiral antenna structure is configured to include. The method according to claim 1, The quadrefill spiral antenna structure, Changing the dielectric constant of the pillar, changing the thickness of the pillar, changing the dielectric constant of the pillar upper plate, changing the thickness of the pillar upper plate, changing the length of the first radiating element, changing the length of the second radiating element, changing the length of the impedance improving part Quad refill multiple spiral antenna characterized in that so that the frequency adjustment of the antenna carried by one or more of the change in the impedance improve portion width change, changing the contact position of the improved impedance portion. The method according to claim 1, The pillar 10 is, Quadrefill spiral antenna structure, characterized in that consisting of one of a dielectric, ceramic, substrate. The method according to claim 1, The pillar 10 is, Quadrefill spiral antenna structure characterized in that implemented by plastic injection. The method according to claim 1, The pillar 10 is,

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Quadrefill spiral antenna structure, characterized in that consisting of one of. The method according to claim 1, The pillar upper plate portion 12, Quadrefill spiral antenna structure, characterized in that composed of one of a dielectric, ceramic, substrate. The method according to claim 1, The pillar upper plate portion 12, Quadrefill spiral antenna structure, characterized in that consisting of one of the circle, triangle, square, pentagon, hexagon, octagon, octagon, pentagon, 10, 11, 12, 16, 32, 64. The method according to claim 1, The first radiating element 13, Quadrefill spiral antenna structure, characterized in that implemented by one of the wire, the press antenna. The method according to claim 1, The first radiating element 13 and the impedance improving unit 17,

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Quad refiller spiral antenna structure, characterized in that consisting of and one of the left and right inverted form for each. Pillar 20; A pillar upper plate portion 22 formed on the pillar 20; A first radiating element 23 formed on the pillar 20; A second radiation formed in the column upper plate portion 22, one end of which is electrically connected to the first radiation element 23, and the other end of which is connected to each other to form a shorted QHA structure 2; Element 25; And An impedance improving unit 27 electrically connected to the first radiating element 23 and formed in the pillar 20; Quadrefill spiral antenna structure is configured to include. The method according to claim 11, The quadrefill spiral antenna structure, Changing the dielectric constant of the pillar, changing the thickness of the pillar, changing the dielectric constant of the pillar upper plate, changing the thickness of the pillar upper plate, changing the length of the first radiating element, changing the length of the second radiating element, changing the length of the impedance improving part And adjusting the frequency of the antenna by at least one of changing a width of the impedance improving unit and changing a contact position of the impedance improving unit. The method according to claim 11, The pillar 20 is, Quadrefill spiral antenna structure, characterized in that consisting of one of a dielectric, ceramic, substrate. The method according to claim 11, The pillar 20 is, Quadrefill spiral antenna structure characterized in that implemented by plastic injection. The method according to claim 11, The pillar 20 is,

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Quadrefill spiral antenna structure, characterized in that consisting of one of. The method according to claim 11, The column upper plate portion 22, Quadrefill spiral antenna structure, characterized in that consisting of one of the dielectric, ceramic, PCB, LTCC. The method according to claim 11, The column upper plate portion 22, Quadrefill spiral antenna structure, characterized in that consisting of one of the circle, triangle, square, pentagon, hexagon, octagon, octagon, pentagon, 10, 11, 12, 16, 32, 64. The method according to claim 11, The first radiating element 23, Quadrefill spiral antenna structure, characterized in that implemented by one of the wire, the press antenna. The method according to claim 11, The first radiating element 23 and the impedance improving unit 27,

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Quad refiller spiral antenna structure, characterized in that consisting of and one of the left and right inverted form for each. Pillar 80; A pillar upper plate portion 82 formed on the pillar 80; A first radiating element (83) formed on the pillar (80); A second radiating element (85) formed at the column upper plate (82), one end of which is electrically connected to the first radiating element (83); And An impedance improving unit 87 electrically connected to the second radiating element 85 and formed on the pillar upper plate 82; Quadrefill spiral antenna structure is configured to include. The method according to claim 21, The quadrefill spiral antenna structure, Changing the dielectric constant of the pillar, changing the thickness of the pillar, changing the dielectric constant of the pillar upper plate, changing the thickness of the pillar upper plate, changing the length of the first radiating element, changing the length of the second radiating element, changing the length of the impedance improving part And adjusting a frequency of the antenna by at least one of changing a width of the impedance improving unit and changing a contact position of the impedance improving unit. The method according to claim 21, The pillar 80 is, Quadrefill spiral antenna structure, characterized in that consisting of one of a dielectric, ceramic, substrate. The method according to claim 21, The pillar 80 is, Quadrefill spiral antenna structure characterized in that implemented by plastic injection. The method according to claim 21, The pillar 80 is,

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Quadrefill spiral antenna structure, characterized in that consisting of one of. The method according to claim 21, The pillar upper plate portion 82, Quad refiller spiral antenna structure characterized in that composed of one or more of dielectric, ceramic, PCB, LTCC. The method according to claim 21, The pillar upper plate portion 82, Quadrefill spiral antenna structure, characterized in that consisting of one of the circle, triangle, square, pentagon, hexagon, octagon, octagon, pentagon, 10, 11, 12, 16, 32, 64. The method according to claim 21, The first radiating element 83 is, Quadrefill spiral antenna structure, characterized in that implemented by one of the wire, the press antenna. delete The method according to claim 21, The second radiating element 85 is,

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Quad refiller spiral antenna structure, characterized in that consisting of and one of the left and right inverted form for each. The method according to any one of claims 1 to 20, The quadrefill spiral antenna structure, A feeder substrate part (19, 29) connected to the first radiating element (13, 23); Quadrefill spiral antenna structure, characterized in that further comprises a. The method according to any one of claims 1 to 7 or 9 to 17 or 19 to 27 or 30, The quadrefill spiral antenna structure, And a feeder substrate part (19, 29) connected to the first radiating element (13, 23) automatically or manually by an L shape (73A) and connected to the first radiating element (13, 23). The method according to any one of claims 1 to 20, The quadrefill spiral antenna structure, A feeder substrate portion 79 connected to the first radiating element and formed of a multilayer substrate; Quadrefill spiral antenna structure is configured to further include. The method according to claim 33, The feeder substrate portion 79, A ground portion 79A including a contact portion 74 connected to the first radiating element; A feeder circuit portion 79B connected to a lower layer of the ground portion 79A; An LNA ground portion 79C formed under the feeder circuit portion 79B; And An LNA circuit portion 79D formed under the LNA ground portion 79C; Quadrefill spiral antenna structure is configured to include. The method according to claim 33, The feeder substrate portion 79, Quad refiller spiral antenna structure, characterized in that consisting of one of the PCB, LTCC, semiconductor. The method according to any one of claims 21 to 28 or 30, The quadrefill spiral antenna structure, A secondary feeder unit 88 connected to the second radiating element and formed of a multilayer substrate in the middle of the pillar; Quadrefill spiral antenna structure is configured to further include. The method of claim 36, The secondary feeder unit 88, A first feed point 88A connected to the primary feeder unit 89; And A second feed point 88B connected to the second radiating element; Quadrefill spiral antenna structure is configured to include. The method of claim 36, The secondary feeder unit 88, Quad refiller spiral antenna structure, characterized in that consisting of one of the PCB, LTCC, semiconductor. delete delete delete delete delete The method according to any one of claims 1 to 28 or 30, The quadrefill spiral antenna structure, Quadrefill spiral antenna structure, characterized in that applied to one of the mobile phone, RFID, GPS, satellite receiver DMB, PDA, PC, LCD, navigation terminal.

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