CN110112543A - A novel WLAN planar inverted F dual-band antenna based on photovoltaic solar energy - Google Patents

Abstract

The invention discloses a novel WLAN (wireless local area network) planar inverted-F dual-frequency antenna based on photovoltaic solar energy, which is characterized in that a photovoltaic solar cell panel is added on the basis of the novel WLAN planar inverted-F dual-frequency antenna, and belongs to the fusion of two technical fields of new energy and electronic information. The antenna consists of a radiation element and a grounding plate, and then the solar cell panel and the antenna are integrated to save space, and the solar cell is used for supplying power to active devices in other communication equipment. The invention adopts 50 omega coaxial cable to directly feed to the radiation patch, and the antenna with good bandwidth and impedance matching can be obtained by adjusting the position of the short-circuit needle and the length of the open end of the radiation patch. The invention has the characteristics of small volume, energy conservation, light weight and the like, and can be easily placed at the corners of display panels of various wireless local area network devices such as notebook computers and the like.

Description

A novel WLAN planar inverted F dual-band antenna based on photovoltaic solar energy

technical field

The invention relates to a novel WLAN planar inverted F dual-frequency antenna based on photovoltaic solar energy, which belongs to the integration of two major technical fields of new energy and electronic information.

Background technique

With the introduction of IEEE802.11a (5.15～5.35GHz, 5.725～5.825GHz) and IEEE802.11b (2.4～2.48GHz) standards, wireless local area network (WLAN) communication technology has been developed rapidly. At the same time, the demand for WLAN antennas is gradually increasing. Whether it is a mobile phone, a microcomputer, a wireless network card of a personal computer or a variety of remote sensing devices, miniaturized antennas with small size and light weight are required. At the same time, in order to adapt to various complex environments, the antenna is also required to have good omnidirectional performance.

Planar Inverted F Antenna (PIFA) is an antenna with both horizontal and vertical polarization characteristics. It has the advantages of miniaturization, compact structure, easy built-in, processing, simple fabrication, low cost, small backward radiation, and specific absorption rate (SAR) Therefore, it is widely used in current mobile communication systems, especially in mobile terminals. At the same time, the functions of PIFA antennas are increasingly diversified, and PIFA antennas applied to WLAN have become a research hotspot. The present invention will propose a novel WLAN planar inverted F dual-frequency antenna based on solar energy.

Contents of the invention

The technical problem to be solved by the present invention is to solve the problem of increasing the impedance bandwidth of the PIFA antenna in the Bluetooth frequency band and the WLAN frequency band, and the whole device breaks the traditional grid or battery power supply and adopts photovoltaic solar power supply. A new WLAN planar inverted F dual-band antenna based on photovoltaic solar energy is proposed. The antenna has the characteristics of small size, wide bandwidth, light weight, simple structure, easy to manufacture and environmental protection.

The present invention adopts above technical scheme, has following technical effect:

A novel WLAN planar inverted F dual-frequency antenna based on photovoltaic solar energy, including a ground plate, a radiation patch arranged on the ground plate, and a solar panel integrated with the ground plate, between the radiation patch and the ground plate There is no medium other than air, the radiation patch is jointly supported by coaxial cables and short-circuit pins, and the solar cell panel is integrated into the ground plate as a parasitic unit to become the same circuit unit.

As a further preferred solution of the novel WLAN planar inverted-F dual-frequency antenna based on photovoltaic solar energy in the present invention, the ground plate is rectangular, and the radiation patch is inverted-F, supported on the ground plate by a coaxial cable and a short-circuit pin , keeping the radiating patch parallel to the ground plane with no medium other than air in between.

As a further preferred solution of the novel WLAN planar inverted F dual-frequency antenna based on photovoltaic solar energy in the present invention, the photovoltaic solar panel is laid on the upper part of the ground plate, and forms a circuit unit with the antenna, and uses solar energy as an active component in other communication devices. device power.

As a further preferred solution of the novel WLAN planar inverted F dual-frequency antenna based on photovoltaic solar energy in the present invention, the coaxial cable is directly fed by a 50Ω coaxial cable.

As a further preferred solution of the novel WLAN planar inverted F dual-frequency antenna based on photovoltaic solar energy in the present invention, the ground plate and the radiation patch are both made of copper sheet with a thickness of 0.2 mm.

As a further preferred solution of the novel WLAN planar inverted-F dual-frequency antenna based on photovoltaic solar energy in the present invention, the radiation patch has an F-shaped slot.

As a further preferred solution of the novel WLAN planar inverted F dual-frequency antenna based on photovoltaic solar energy of the present invention, the height H between the ground plate and the radiation patch is 7 mm, that is, the length of the coaxial cable and the shorting pin is 7 mm.

As a further preferred solution of the novel WLAN planar inverted F dual-frequency antenna based on photovoltaic solar energy in the present invention, the radiation patch is divided into two radiation units by a short-circuit pin, and the position of the short-circuit pin is located at 12 mm from the left edge of the radiation patch and radiates The length of the patch open end is 16mm.

As a further preferred solution of the novel WLAN planar inverted F dual-frequency antenna based on photovoltaic solar energy of the present invention, the ground plate is rectangular, its length a is 200mm, and its width b is 200mm; the length c of the radiation patch is 27.5mm, The width d is 11 mm.

As a further preferred solution of the novel WLAN planar inverted F dual-frequency antenna based on photovoltaic solar energy in the present invention, the size of an F-shaped slot in the radiation patch is: c=27.5mm, d=11mm, e=5mm, f=6mm , g=12.5mm, h=5mm, i=16mm.

In the present invention, by adjusting the position of the short-circuit patch and the length of the open end of the radiation patch, the two resonant frequency points of the antenna are respectively 2.4GHz and 5GHz; The position of the chip and the length of the open end of the radiating unit are adopted to open an "F" slot to obtain an antenna with good bandwidth and impedance matching, and has the advantages of economy, environmental protection, simple structure, small size, low manufacturing cost and easy processing. Advantages, suitable for current wireless communication systems and has broad application prospects.

Description of drawings

Figure 1 is a schematic diagram of the three-dimensional structure and reference coordinates of the antenna;

Figure 2 is a schematic diagram of the front structure and reference coordinates of the antenna;

Figure 3 is the simulated antenna input impedance;

Fig. 4 is the simulated antenna return loss characteristic curve;

Fig. 5 is the antenna pattern of simulation;

Among them: 1-ground plate, 2-radiation patch, 3-solar panel, 4-coaxial cable, 5-short circuit pin.

Detailed ways

Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

Those skilled in the art can understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It should also be understood that terms such as those defined in commonly used dictionaries should be understood to have a meaning consistent with the meaning in the context of the prior art, and will not be interpreted in an idealized or overly formal sense unless defined as herein explain.

The present invention relates to a novel WLAN planar inverted F dual-frequency antenna based on photovoltaic solar energy, comprising a ground plate 1 and a radiation unit 2 arranged above the ground plate 1 and a front photovoltaic solar cell panel 3, characterized in that:

The radiating unit includes a short-circuit pin and a feeding unit, and the radiating patch is divided into two radiating units by the short-circuiting pin; the feeding unit is a coaxial cable; The high-frequency antenna is directly fed by a 50Ω coaxial cable.

The grounding plate 1 is rectangular, and the radiation unit 2 is located above the grounding plate 1 and is made of 2 mm thick copper sheet. The feed unit and the shorting pin connect and support the grounding plate and the radiating unit to keep them parallel.

The solar panel 3 is laid on the front surface of the ground plate 1 to supply power for active components in the communication equipment.

The length of the short-circuit pin 5 is a metal sheet of 7 mm, and the position of the short-circuit pin can be adjusted.

The ground plate is made of copper sheet with a thickness of 0.2mm.

There is no medium other than air between the ground plate 1 and the radiation patch 2 .

Both the short-circuit pin 5 and the coaxial cable 4 are 7 mm long, and the supporting radiation patch and the ground plate are kept parallel to each other.

An "F"-shaped slot is opened on the radiation patch to increase the electrical length of the antenna, thereby meeting the miniaturization requirement and increasing the impedance bandwidth of the antenna.

The position of the short-circuit pin and the length of the open-circuit end of the radiation patch can be adjusted to change the lengths of the current path A and the current path B, thereby changing the resonant frequency point. Finally, the position of the short-circuit pin is selected as 12mm, and the length of the open-circuit end of the radiation patch is 16mm. .

The length a of the ground plate 1 is 200 mm, and the width b is 200 mm; the length c of the radiation patch is 27.5 mm, and the width d is 11 mm.

Embodiment one

As shown in Figure 1 and Figure 2, the structure of the present invention is: the antenna is made on the grounding plate 1 of 200mm×200mm, the radiation unit is completed by a copper radiation patch of 27.5mm×11mm, and the photovoltaic solar panel is laid on the grounding plate The positive surface of the communication equipment supplies power to the active devices in the communication equipment; there is only air as the medium between the radiating unit and the grounding plate; the shorting pin and the coaxial cable connect the radiating patch and the grounding plate, and support the radiating patch so that it is in contact with the grounding plate The ground planes are kept parallel and both have a length of 7mm. The length a of the ground plate is 200mm, the width b is 200mm, the length c of the radiation patch is 27.5mm, and the width d is 11mm. The antenna impedance bandwidth increases.

Accompanying drawing 3 is the graph of antenna input impedance result. According to the results in Figure 3, it can be seen that the antenna works in two frequency bands of 2.4GHz and 5GHz, and the bandwidth meets the standard when the voltage standing wave ratio VWSR<2 (2.4GHz frequency band: 2.3-2.4GHz; 5GHz frequency band: 5.3-5.4GHz).

Accompanying drawing 4 is the result report of antenna input impedance. According to the results in Figure 4, it can be seen that when the frequency of the antenna is 2.4GHz, the input impedance of the antenna is (53+j13)Ω; when the frequency of the antenna is 5.3GHz, the input impedance of the antenna is (54+j)Ω.

In summary, the new WLAN planar inverted F dual-frequency antenna based on photovoltaic solar energy realizes the adjustment of the resonant frequency and the corresponding bandwidth by adjusting the length of the short-circuit pin and the open end of the radiating unit; due to the addition of solar panels, the antenna realizes the use of solar power. , to avoid environmental pollution caused by battery replacement, and to prolong the working time. Therefore, the antenna can be widely used in current wireless local area networks. The antenna is simple in structure, light in size, easy to manufacture, low in cost, green and economical, and is a PIFA antenna with better performance.

The above descriptions are only part of the embodiments of the present invention. It should be pointed out that those skilled in the art can make some improvements and modifications without departing from the principles of the present invention. It should be regarded as the protection scope of the present invention.

Claims (10)

1. A new WLAN planar inverted F dual-frequency antenna based on photovoltaic solar energy, including a ground plate (1), a radiation patch (2) set on the ground plate, and a solar panel integrated with the ground plate (3) , characterized in that there is no medium other than air between the radiation patch (2) and the grounding plate (1), and the radiation patch is jointly supported by a coaxial cable (4) and a short-circuit pin (5) , the solar cell panel (3) is integrated into the ground plate as a parasitic unit to become the same circuit unit. 2. the novel WLAN planar inverted F dual-frequency antenna based on photovoltaic solar energy according to claim 1, is characterized in that: the ground plate (1) is rectangular, and the radiation patch (2) is an inverted F type, by The coaxial cable (4) and the shorting pin (5) are jointly supported on the grounding plate (1), so that the radiation patch (2) is kept parallel to the grounding plate (1) and there is no medium other than air between them . 3. The novel WLAN planar inverted F dual-frequency antenna based on photovoltaic solar energy according to claim 1, characterized in that: the photovoltaic solar cell panel (3) is laid on the top of the grounding plate (1), and becomes a circuit with the antenna A unit that uses solar energy to power active components in other communications equipment. 4. The novel WLAN planar inverted F dual-frequency antenna based on photovoltaic solar energy according to claim 1, characterized in that: the coaxial cable (4) adopts a 50Ω coaxial cable for direct feeding. 5. The novel WLAN planar inverted F dual-frequency antenna based on photovoltaic solar energy according to claim 2, characterized in that: the ground plate (1) and the radiation patch (2) are made of copper sheets with a thickness of 0.2mm . 6. The novel WLAN planar inverted F dual-frequency antenna based on photovoltaic solar energy according to claim 2, characterized in that: the radiation patch (2) has an F-shaped slot. 7. the novel WLAN planar inverted F dual-frequency antenna based on photovoltaic solar energy according to claim 2, is characterized in that: the height H between the ground plate (1) and the radiation patch (2) is 7mm, that is The length of the coaxial cable (4) and the shorting pin (5) is 7mm. 8. the novel WLAN planar inverted F dual-frequency antenna based on photovoltaic solar energy according to claim 2, is characterized in that: described radiation patch (2) is divided into two radiation units by short-circuit pin (5), short-circuit pin ( 5) The position is located 12mm away from the left edge of the radiation patch and the length of the open end of the radiation patch is 16mm. 9. the novel WLAN planar inverted F dual-frequency antenna based on photovoltaic solar energy according to claim 1, is characterized in that: the ground plate (1) is rectangular, its length a is 200mm, and width b is 200mm; The length c of the patch (2) is 27.5 mm, and the width d is 11 mm. 10. The novel WLAN planar inverted F dual-frequency antenna based on photovoltaic solar energy according to claim 6, characterized in that: the radiation patch (2) has an F-shaped slot with a size of: c=27.5mm, d=11mm, e=5mm, f=6mm, g=12.5mm, h=5mm, i=16mm.