CN102208713A - Mobile communication device - Google Patents

Abstract

A mobile communication device. The mobile communication device is provided with a dielectric substrate and an antenna, wherein the dielectric substrate is provided with a ground plane, a first non-ground-plane interval and a second non-ground-plane interval, the ground plane comprises a main ground plane and a protruding ground plane, the protruding ground plane is electrically connected with the main ground plane, the protruding ground plane extends between the first non-ground-plane interval and the second non-ground-plane interval to separate the first non-ground-plane interval and the second non-ground-plane interval, and one edge of the protruding ground plane is aligned with one edge of the dielectric substrate; the antenna is of a plane structure, is positioned on the dielectric substrate and is provided with a feed-in part and a radiation part, the feed-in part is positioned in a first non-grounding surface area, the radiation part crosses over the protruding grounding surface, one end of the radiation part is positioned in the first non-grounding surface area and is electrically connected to the grounding surface, the other end of the radiation part is positioned in a second non-grounding surface area and is electrically connected to the grounding surface, a coupling interval is arranged between the radiation part and the feed-in part in the first non-grounding surface area, and the radiation part is capacitively coupled and excited by the feed. The invention increases the degree of freedom of design.

Description

mobile communication device

technical field

The invention relates to a mobile communication device, in particular to a mobile communication device whose built-in antenna is integrated with a ground plane of a configurable data transmission component.

Background technique

With the rapid evolution of wireless communication technology, the vigorous development of the wireless communication industry has been driven, making the mobile communication device light, thin, short, small and the integration of multi-band operation become very important design goals. In the mobile communication device, in order to obtain the reduced size of the antenna while obtaining broadband operation, the known technology is to directly arrange the antenna radiator in the non-ground plane area of the system circuit board in the mobile communication device to reduce the Q of the antenna. Value, providing enough operating bandwidth to cover the broadband work of wireless wide area network (WWAN, wireless wide area network). However, generally such wireless wide area network antennas are mostly configured in a single section without a ground plane.

For example, U.S. Patent No. US 7,623,074B2 "Multi-band antenna (multi-frequency antenna)", the antenna is configured in a single area without a ground plane to achieve broadband work, but this antenna configuration makes the antenna assembly It cannot be integrated with the data transmission components in the mobile communication device, such as the universal serial bus (USB, universal serial bus) connector component, so that the internal space of the mobile communication device cannot be configured most effectively.

Therefore, it is necessary to provide a mobile communication device to improve the problems of the prior art.

Contents of the invention

The purpose of the present invention is to provide a mobile communication device to solve the problem of integration between the built-in antenna and the data transmission components, and increase the design freedom of the internal space configuration of the mobile communication device.

In order to achieve the above object, the mobile communication device of the present invention includes a dielectric substrate and an antenna, the dielectric substrate has a ground plane, a first section without a ground plane, and a second section without a ground plane, wherein the ground plane includes a main a ground plane and a protruding ground plane, the protruding ground plane is electrically connected to the main ground plane, and the protruding ground plane extends between the first non-ground plane interval and the second non-ground plane interval, so that the first non-ground plane The ground section and the second non-ground plane section are separated, and an edge of the protruding ground plane is aligned with an edge of the dielectric substrate; the antenna is a planar structure, the antenna is located on the dielectric substrate, and the antenna has a feeder An input portion and a radiation portion, wherein the feed-in portion is located in the first non-ground plane interval, the radiation portion straddles the protruding ground plane, and one end of the radiation portion is located in the first non-ground plane interval and is electrically connected to the ground plane , the other end of the radiating part is located in the second non-ground plane interval and is electrically connected to the ground plane, there is a coupling distance between the radiating part and the feed-in part in the first non-ground plane space, by the coupling distance , the radiating part is excited by the capacitive coupling of the feeding part.

In addition to achieving the five-band broadband operation of the wireless wide area network, the present invention also solves the integration problem of the data transmission component and the built-in antenna, and increases the design freedom of the internal space configuration of the mobile communication device.

Description of drawings

FIG. 1 is a structural diagram of the first embodiment of the mobile communication device of the present invention.

FIG. 2 is a graph showing the antenna return loss measurement results of the first embodiment of the mobile communication device of the present invention.

FIG. 3 is a structural diagram of the second embodiment of the mobile communication device of the present invention.

FIG. 4 is a structural diagram of a third embodiment of the mobile communication device of the present invention.

Description of main component symbols:

Mobile communication device 1, 3, 4 Antenna feed points 141, 341

Dielectric substrate 10 Radiation section 15, 35, 45

Ground plane 11 Short-circuit points 151, 152, 351, 352, 451, 452

Main ground plane 111 Through holes 153, 154, 353, 354, 453, 454

Protruding ground plane 112 Coupling spacing 16, 36

Edge 113 Data Transfer Component 17

The first interval without ground plane 12 The first working frequency band 21

The second non-ground plane interval 13 The second working frequency band 22

Feed-in part 14, 34

Detailed ways

In order to make the above and other objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention are listed below and described in detail in conjunction with the accompanying drawings.

FIG. 1 is a structural diagram of the first embodiment of the mobile communication device of the present invention. The mobile communication device 1 includes a dielectric substrate 10 and an antenna, wherein the dielectric substrate 10 has a ground plane 11, a first ground plane-free section 12 and a second ground plane-free section 13, wherein the ground plane 11 includes a main A ground plane 111 and a protruding ground plane 112 , the protruding ground plane 112 is electrically connected to the main ground plane 111 , and the protruding ground plane 112 extends between the first non-ground plane area 12 and the second ground plane-free area 13 , to separate the first ground plane-free zone 12 and the second ground plane-free zone 13 , and an edge 113 of the protruding ground plane 112 is aligned with an edge of the dielectric substrate 10 .

The antenna is a planar structure, which is located on the dielectric substrate 10. The antenna has a feed-in portion 14 and a radiation portion 15, wherein the feed-in portion 14 is located in the first ground-free section 12, and the radiation portion 15 straddles the Protruding from the ground plane 112, and one end of the radiating part 15 is located in the first non-ground plane area 12 and is electrically connected to the ground plane 11, and the other end of the radiation part is located in the second non-ground plane area 13 and is electrically connected to the The ground plane 11 , the radiation part 15 and the feeding part 14 have a coupling distance 16 in the first ground-free zone 12 , and the radiation part 15 is capacitively coupled and excited by the feeding part 14 through the coupling distance 16 .

In this embodiment, the dielectric substrate 10 is a system circuit board of a mobile communication handset. The antenna has a first working frequency band covering at least 824-960MHz, and a second working frequency band covering at least 1710-2170MHz. The antenna is formed on the dielectric substrate 10 by printing or etching technology. The radiating portion 15 of the antenna is a metal wire of equal width, and the radiating portion 15 is bent seven times. The feeding portion 14 is T-shaped. Two ends of the radiation portion 15 are electrically connected to the main ground plane 111 and the protruding ground plane 112 respectively.

In addition, the protruding ground plane 112 can be configured with a data transmission component 17 to provide a data transmission interface between the mobile communication device 1 and an external device.

FIG. 2 is a measured return loss diagram of the first embodiment 1 of the mobile communication device of the present invention. In the first embodiment, the following dimensions are selected for experimentation: the length of the dielectric substrate 10 is about 115 mm, the width is about 60 mm, and the thickness is about 0.8 mm; the length of the main ground plane 111 is about 100 mm, and the width is about 60 mm; the length of the protruding ground plane 112 It is about 15mm and the width is about 10mm. The length of the first non-ground plane section 12 is about 15mm and the width is about 25mm; the length of the second non-ground plane section 13 is about 15mm and the width is about 25mm.

According to the experimental results, under the definition of 6dB return loss (design specifications for mobile communication device antennas), the first working frequency band 21 can cover the second-frequency work of GSM850/900, and the second working frequency band 22 can cover GSM1800/1900/UMTS Three-band work, so the antenna can meet the WWAN five-band work requirements, and at the same time, the size of the protruding ground plane 112 is enough to configure a universal serial bus connector component to achieve the integration problem between the antenna and the data transmission component.

FIG. 3 is a structural diagram of the second embodiment of the mobile communication device of the present invention. The mobile communication device 3 includes a dielectric substrate 10 and an antenna, wherein the dielectric substrate 10 has a ground plane 11, a first ground plane-free section 12 and a second ground plane-free section 13, and the ground plane 11 includes a main The ground plane 111 and a protruding ground plane 112 . The antenna has a feed-in portion 34 and a radiation portion 35, wherein the feed-in portion 34 is located in the first ground-free zone 12, the radiation portion 35 straddles the protruding ground plane 112, and one end of the radiation portion 35 is located in the first A non-ground plane section 12 is electrically connected to the ground plane 11, the other end of the radiating part 35 is located in the second non-ground plane section 13 and is electrically connected to the ground plane 11, the radiating part 35 and the feed-in part 34 There is a coupling distance 36 between the first ground plane-free section 12 .

The main difference between the second embodiment and the above-mentioned first embodiment is that the feed-in portion 34 uses a shape different from that of the feed-in portion 14 (the feed-in portion 34 is L-shaped), and both ends of the radiation portion 35 are electrically connected to the main ground plane 111, The radiating portion 35 is bent eight times. The other antenna structures of the second embodiment are similar to those of the first embodiment 1 above, and under this similar structure, the second embodiment can also have functions similar to those of the first embodiment above.

FIG. 4 is a structural diagram of a third embodiment of the mobile communication device of the present invention. The mobile communication device 4 includes a dielectric substrate 10 and an antenna, wherein the dielectric substrate 10 has a ground plane 11, a first ground plane-free section 12 and a second ground plane-free section 13, and the ground plane 11 includes a main The ground plane 111 and a protruding ground plane 112 . The antenna has a feed-in portion 14 and a radiation portion 45, wherein the feed-in portion 14 is located in the first ground-free zone 12, the radiation portion 45 straddles the protruding ground plane 112, and one end of the radiation portion 45 is located in the second A non-ground plane section 12 is electrically connected to the ground plane 11, the other end of the radiating part 45 is located in the second non-ground plane section 13 and is electrically connected to the ground plane 11, the radiating part 45 and the feeding part 14 There is a coupling distance 16 between the first ground plane-free intervals 12 .

The main difference between the third embodiment and the above-mentioned first embodiment is that the radiation portion 45 is a metal wire with unequal width. In FIG. 4 , a bent line segment in the radiation portion 45 is wider, and its purpose is to adjust the impedance matching of the antenna. Other antenna structures of the third embodiment are similar to those of the first embodiment above, and under this similar structure, the second embodiment can also have functions similar to those of the first embodiment above.

In summary, since an edge 113 of the protruding ground plane 112 is aligned with an edge of the dielectric substrate 10, a data transmission component 17 can be disposed on the protruding ground plane 112 to provide the mobile communication devices 1, 3, 4. A data transmission interface with an external device. The antenna also has a first working frequency band covering at least 824～960MHz (GSM850/900) and a second working frequency band covering at least 1710～2170MHz (GSM1800/1900/UMTS). Therefore, the mobile communication device 1, 3, The 4 antenna can not only achieve the five-band broadband operation of the wireless wide area network, but also solve the integration problem of the data transmission component and the built-in antenna, and increase the design freedom of the internal space configuration of the mobile communication device.

To sum up, the present invention, regardless of its purpose, means, and efficacy, shows its characteristics that are completely different from the known technology. I urge the examiner to be aware of it and grant a patent as soon as possible to benefit the society. I really appreciate it. However, it should be noted that the above-mentioned embodiments are examples only for the convenience of description, and the scope of rights claimed in the present invention should naturally be determined by the scope of the claims, rather than limited to the above-mentioned embodiments.

Claims (10)

1. mobile communications device, this mobile communications device comprises:

One medium substrate, this medium substrate has a ground plane, the interval and one second no ground plane interval of one first no ground plane, wherein this ground plane comprises a main ground plane and an outstanding ground plane, being somebody's turn to do outstanding ground plane and this main ground plane is electrically connected, should extend between this first no ground plane interval and this second no ground plane interval by outstanding ground plane, make the interval and interval separation of this second no ground plane of this first no ground plane, the edge in this outstanding ground plane aligns with a edge in this medium substrate; And

One antenna, this antenna is a planar structure, this antenna is positioned on this medium substrate, this antenna has a feeding portion and a Department of Radiation, wherein this feeding portion is positioned at this first no ground plane interval, this Department of Radiation strides across this outstanding ground plane, and an end of this Department of Radiation is positioned at this first no ground plane interval and is electrically connected to this ground plane, the other end of this Department of Radiation is positioned at this second no ground plane interval and is electrically connected to this ground plane, has a coupling spacing between this Department of Radiation and this feeding portion in this first no ground plane interval, by this coupling spacing, this Department of Radiation is excited by this feeding portion capacitive coupling.

2. mobile communications device as claimed in claim 1, wherein this medium substrate is the system circuit board of a mobile communication mobile phone.

3. mobile communications device as claimed in claim 1, wherein this antenna has one first working band, and this first working band is contained 824～960MHz at least, and one second working band, and this second working band is contained 1710～2170MHz at least.

4. mobile communications device as claimed in claim 1, wherein this Department of Radiation of this antenna is a wide or not metal wire of metal wire or.

5. mobile communications device as claimed in claim 4, wherein this Department of Radiation of this antenna is for bending seven times or bending eight times.

6. mobile communications device as claimed in claim 1, wherein this antenna is formed on this medium substrate with printing or etching technique.

7. mobile communications device as claimed in claim 1 wherein should be used to dispose a data transfer components by outstanding ground plane, and the data transmission interface of this mobile communications device and an external device (ED) is provided.

8. described mobile communications device as claimed in claim 1, wherein this feeding portion is the T font or is the L font.

9. mobile communications device as claimed in claim 1, wherein the two ends of this Department of Radiation are electrically connected to this main ground plane respectively and should give prominence to ground plane.

10. mobile communications device as claimed in claim 1, wherein the two ends of this Department of Radiation all are electrically connected to this main ground plane.

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