CN103731175A - Antenna assembly and wireless communication device provided with antenna assembly - Google Patents
Antenna assembly and wireless communication device provided with antenna assembly Download PDFInfo
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- CN103731175A CN103731175A CN201210380934.3A CN201210380934A CN103731175A CN 103731175 A CN103731175 A CN 103731175A CN 201210380934 A CN201210380934 A CN 201210380934A CN 103731175 A CN103731175 A CN 103731175A
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- electric capacity
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Abstract
The invention provides an antenna assembly which comprises an antenna, a radio frequency circuit and a matching circuit. The matching circuit is electrically connected between the antenna and the radio frequency circuit. The matching circuit comprises a first matching subcircuit and a second subcircuit, and the first matching subcircuit and the second subcircuit are connected in parallel. The first matching subcircuit is used for matching antenna impedance so that the antenna can receive and send wireless signals covering a first frequency band. The second matching circuit is used for matching the antenna impedance so that the antenna can receive and send wireless signals covering a second frequency band. The invention further provides a wireless communication device provided with the antenna assembly. The antenna assembly can improve the frequency width of the antenna and is beneficial for miniaturized development of the wireless communication device.
Description
Technical field
The present invention relates to a kind of antenna module and there is the radio communication device of this antenna module.
Background technology
In radio communication device, be used for transmitting, reception radio wave to transmit, to exchange the antenna assembly of radio data signal, beyond doubt one of most important assembly in radio communication device.The communication system of various use different operating frequency bands and the continuous appearance of application in recent years, makes the design of antenna towards the broad-band antenna development of containing a plurality of band system band.In order to ensure radio communication device, in the various wireless communication system of using different operating frequency band, all can carry out signal transmission, this antenna assembly must be able to be received and dispatched the signal of multiple different frequency.On the other hand, broad-band antenna general structure is comparatively complicated, but because the outward appearance of Anneta module also trends towards frivolous and microminiaturization, makes Antenna Design except broadband, also needs to possess the feature that has miniaturization simultaneously.How under the prerequisite that does not increase radio communication device volume, to make antenna there is the characteristic in broadband, become the challenge of Ge Jia antenna manufacturer maximum.
Summary of the invention
In view of above situation, be necessary to provide the broad-band antenna assembly of the wider and small volume of a kind of frequency range.
Separately, be also necessary to provide a kind of radio communication device with above-mentioned antenna module.
A kind of antenna module, it comprises antenna, radio circuit and match circuit, this match circuit is electrically connected between antenna and radio circuit, this match circuit comprises the first coupling branch road parallel with one another and the second coupling branch road, this the first coupling branch road is used for mating antenna impedance, so that antenna receiving-sending is contained the wireless signal of the first frequency range, this second coupling branch road is used for mating antenna impedance, so that antenna receiving-sending is contained the wireless signal of the second frequency range.
A kind of radio communication device, it comprises carrier, is located at antenna, radio circuit and match circuit on carrier, this match circuit is electrically connected between antenna and radio circuit, this match circuit comprises the first coupling branch road parallel with one another and the second coupling branch road, this the first coupling branch road is used for mating antenna impedance, so that antenna receiving-sending is contained the wireless signal of the first frequency range, this second coupling branch road is used for mating antenna impedance, so that antenna receiving-sending is contained the wireless signal of the second frequency range.
Above-mentioned antenna module is by between antenna and radio circuit, match circuit being set, and to mate the impedance of antenna, thereby the size that promotes antenna bandwidth and dwindle antenna reaches and reduces antenna manufacturing cost, is convenient to the object of the miniaturization development of radio communication device.
Accompanying drawing explanation
Fig. 1 is the functional block diagram of the antenna module of better embodiment of the present invention;
Fig. 2 is the floor map of the antenna of the antenna module shown in Fig. 1;
Fig. 3 is the circuit diagram of the match circuit shown in Fig. 1.
Main element symbol description
| |
100 |
| |
10 |
| |
12 |
| |
20 |
| |
30 |
| |
40 |
| |
42 |
| The first Department of Radiation | 44 |
| The second Department of Radiation | 46 |
| |
50 |
| Share electric capacity | C |
| The first |
52 |
| The first electric capacity | C1 |
| The first inductance | L1 |
| The second |
54 |
| The second inductance | L2 |
| The second electric capacity | C2 |
| The 3rd inductance | L3 |
| The 3rd electric capacity | C3 |
| |
200 |
Following embodiment further illustrates the present invention in connection with above-mentioned accompanying drawing.
Embodiment
Refer to Fig. 1, better embodiment of the present invention provides a kind of antenna module 100, and it is applied in the radio communication devices such as mobile phone 200.
This antenna module 100 comprises carrier 10 and is arranged at mainboard 20, radio circuit 30, antenna 40 and the match circuit 50 on carrier 10.
In the present embodiment, this carrier 10 is the circuit board of radio communication device 200, and it adopts epoxy resin fiberglass (FR4) to make.One end of this carrier 10 arranges a headroom district 12, the region existing without conductor on these headroom district 12 finger carriers 10, in order to prevent in external environment that electronic building brick is as battery, vibrator, loudspeaker, CCD(Charge Coupled Device, charge coupled device) etc. antenna 40 is produced and disturbed, cause its operating frequency skew or radiation efficiency step-down.
This mainboard 20 is connected by the holding wire on carrier 10 (figure is mark not) with radio circuit 30, and this radio circuit 30 is for modulating baseband signal or demodulation radiofrequency signal.This mainboard 20 is for the radiofrequency signal decoding after radio circuit 30 demodulation is reduced to audio signal, or after audio-frequency signal coding is become to baseband signal, confession radio circuit 30 is modulated.
These antenna 40 available iron parts, flexible circuit board (FPC) or utilize laser direct forming (Laser Direct Structuring, LDS) conductor that technique is made is made, it is arranged at the headroom district 12 of carrier 10, and is electrically connected at successively match circuit 50 and radio circuit 30 by the holding wire on carrier 10.In the present embodiment, this antenna 40 is dual-band antenna, and it is shaped as T shape.This antenna 40 comprises a feeding portion 42, the first Department of Radiation 44 and the second Department of Radiation 46.This feeding portion 42 can pass through shell fragment, co-planar waveguide line (coplanar waveguide, CPW), band line (strip line), microstrip line (microstrip line) or coaxial cable (coaxial cable) be electrically connected with the holding wire on carrier 10, and then from match circuit 50 feed-in current signals.This first Department of Radiation 44 is arranged at the second Department of Radiation 46 both sides that feeding portion 42 is relative, and forms respectively a current path, and then the radiofrequency signal that makes this antenna 40 can receive and dispatch two kinds of different frequency ranges.The shape that is appreciated that this antenna 40 also can arrange according to the required concrete frequency range of radio communication device, for example, be set to irregular T shape, U-shaped or L shaped as shown in Figure 2.
Refer to Fig. 3, this match circuit 50 is electrically connected between radio circuit 30 and antenna 40, for mating the impedance of antenna 40.This match circuit 50 comprises shares capacitor C and the first coupling branch road 52 and the second coupling branch road 54 parallel with one another.
This shared capacitor C and antenna 40 are electrically connected.This first coupling branch road 52 comprises the first capacitor C 1 and the first inductance L 1, and this first capacitor C 1 and the first inductance L 1 are parallel between radio circuit 30 and shared capacitor C.By this first capacitor C 1 and the capacitance of shared capacitor C and the inductance value of the first inductance L 1 is set, can make the impedance of these the first coupling branch road 52 coupling antennas 40, and then make antenna 40 when the wireless signal of transmitting-receiving the first frequency range (as LTE700 or GSM850/900), there is wider frequency range.
This second coupling branch road 54 comprises the second inductance L 2, the second capacitor C 2, the 3rd inductance L 3 and the 3rd capacitor C 3.These the second inductance L 2 one end ground connection, the other end and radio circuit 30 are electrically connected.These the second capacitor C 2 one end ground connection, the other end and shared capacitor C are electrically connected.The 3rd inductance L 3 and the 3rd capacitor C 3 are series between radio circuit 30 and shared capacitor C, are series between the second inductance L 2 and the second capacitor C 2 simultaneously.By this second capacitor C 2, the 3rd capacitor C 3 and the capacitance of shared capacitor C and the inductance value of the second inductance L 2 and the 3rd inductance L 3 are set, can make the impedance of these the second coupling branch road 54 coupling antennas 40, and then make antenna 40 when the wireless signal of transmitting-receiving the second frequency range (as DCS/PCS/UMTS2100), there is wider frequency range.
Further illustrate the operation principle of this antenna module 100 below, first, when radio communication device 200 starts, antenna 40 process match circuits 50 and radio circuit 30 are from mainboard 20 feed-in electric currents, to receive and dispatch the wireless signal of containing the first frequency range and the second frequency range.Existence due to this match circuit 50, the impedance that can preferably mate antenna 40, improve the characteristic of antenna, and then effectively promoted the frequency range of this antenna 40 in the first frequency range and the second frequency range, make this antenna 40 there is wider frequency range without complicated structure and larger size simultaneously.
Claims (10)
1. an antenna module, it comprises antenna, it is characterized in that: this antenna module also comprises radio circuit and match circuit, this match circuit is electrically connected between antenna and radio circuit, this match circuit comprises the first coupling branch road parallel with one another and the second coupling branch road, and this first coupling branch road is used for mating antenna impedance, so that antenna receiving-sending is contained the wireless signal of the first frequency range, this the second coupling branch road is used for mating antenna impedance, so that antenna receiving-sending is contained the wireless signal of the second frequency range.
2. antenna module as claimed in claim 1, is characterized in that: described match circuit also comprises shared electric capacity, and this shared electric capacity and antenna are electrically connected.
3. antenna module as claimed in claim 2, is characterized in that: described the first coupling branch road comprises the first electric capacity and the first inductance, and this first electric capacity and the first inductance in parallel are between radio circuit and shared electric capacity.
4. antenna module as claimed in claim 2, it is characterized in that: described the second coupling branch road comprises the second inductance, the second electric capacity, the 3rd inductance and the 3rd electric capacity, this the second inductance one end ground connection, the other end and radio circuit are electrically connected, this the second electric capacity one end ground connection, the other end and shared electric capacity are electrically connected, and the 3rd inductance and the 3rd capacitances in series, between radio circuit and shared electric capacity, are series between the second inductance and the second electric capacity simultaneously.
5. antenna module as claimed in claim 1, is characterized in that: described antenna module also comprises carrier, and one end of described carrier arranges headroom district, and this antenna is arranged at headroom district, and is electrically connected by the holding wire on carrier and match circuit.
6. antenna module as claimed in claim 1, it is characterized in that: described antenna comprises feeding portion, the first Department of Radiation and the second Department of Radiation, this feeding portion is by shell fragment, co-planar waveguide line, be electrically connected with the holding wire on line, microstrip line or coaxial cable and carrier, this first Department of Radiation and the second Department of Radiation are connected on feeding portion, and form respectively a current path.
7. a radio communication device, it comprises carrier and is located at the antenna on carrier, it is characterized in that: this radio communication device also comprises radio circuit and match circuit, this match circuit is electrically connected between antenna and radio circuit, this match circuit comprises the first coupling branch road parallel with one another and the second coupling branch road, this the first coupling branch road is used for mating antenna impedance, so that antenna receiving-sending is contained the wireless signal of the first frequency range, this the second coupling branch road is used for mating antenna impedance, so that antenna receiving-sending is contained the wireless signal of the second frequency range.
8. radio communication device as claimed in claim 7, is characterized in that: described match circuit also comprises shared electric capacity, and this shared electric capacity and antenna are electrically connected.
9. radio communication device as claimed in claim 8, is characterized in that: described the first coupling branch road comprises the first electric capacity and the first inductance, and this first electric capacity and the first inductance in parallel are between radio circuit and shared electric capacity.
10. radio communication device as claimed in claim 8, it is characterized in that: described the second coupling branch road comprises the second inductance, the second electric capacity, the 3rd inductance and the 3rd electric capacity, this the second inductance one end ground connection, the other end and radio circuit are electrically connected, this the second electric capacity one end ground connection, the other end and shared electric capacity are electrically connected, and the 3rd inductance and the 3rd capacitances in series, between radio circuit and shared electric capacity, are series between the second inductance and the second electric capacity simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210380934.3A CN103731175A (en) | 2012-10-10 | 2012-10-10 | Antenna assembly and wireless communication device provided with antenna assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210380934.3A CN103731175A (en) | 2012-10-10 | 2012-10-10 | Antenna assembly and wireless communication device provided with antenna assembly |
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| Publication Number | Publication Date |
|---|---|
| CN103731175A true CN103731175A (en) | 2014-04-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210380934.3A Pending CN103731175A (en) | 2012-10-10 | 2012-10-10 | Antenna assembly and wireless communication device provided with antenna assembly |
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| Country | Link |
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| CN (1) | CN103731175A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108767443A (en) * | 2018-05-29 | 2018-11-06 | Oppo广东移动通信有限公司 | A kind of antenna assembly and electronic equipment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5375256A (en) * | 1991-09-04 | 1994-12-20 | Nec Corporation | Broadband radio transceiver |
| CN1773877A (en) * | 2004-11-08 | 2006-05-17 | 佛山市顺德区顺达电脑厂有限公司 | Impedance matching circuit of multi-frequency antenna |
| CN101212230A (en) * | 2006-12-26 | 2008-07-02 | 中兴通讯股份有限公司 | Device and method for implementing DVB-H antenna matching network for mobile telephone |
| CN201388196Y (en) * | 2009-03-13 | 2010-01-20 | 中兴通讯股份有限公司 | Mobile terminal realizing the multiband matching of antennas |
| CN102136847A (en) * | 2010-01-26 | 2011-07-27 | 宏达国际电子股份有限公司 | Wideband antenna matching device and method thereof |
| CN102377025A (en) * | 2010-08-24 | 2012-03-14 | 宏达国际电子股份有限公司 | Antenna module and impedance matching method thereof |
-
2012
- 2012-10-10 CN CN201210380934.3A patent/CN103731175A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5375256A (en) * | 1991-09-04 | 1994-12-20 | Nec Corporation | Broadband radio transceiver |
| CN1773877A (en) * | 2004-11-08 | 2006-05-17 | 佛山市顺德区顺达电脑厂有限公司 | Impedance matching circuit of multi-frequency antenna |
| CN101212230A (en) * | 2006-12-26 | 2008-07-02 | 中兴通讯股份有限公司 | Device and method for implementing DVB-H antenna matching network for mobile telephone |
| CN201388196Y (en) * | 2009-03-13 | 2010-01-20 | 中兴通讯股份有限公司 | Mobile terminal realizing the multiband matching of antennas |
| CN102136847A (en) * | 2010-01-26 | 2011-07-27 | 宏达国际电子股份有限公司 | Wideband antenna matching device and method thereof |
| CN102377025A (en) * | 2010-08-24 | 2012-03-14 | 宏达国际电子股份有限公司 | Antenna module and impedance matching method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108767443A (en) * | 2018-05-29 | 2018-11-06 | Oppo广东移动通信有限公司 | A kind of antenna assembly and electronic equipment |
| CN108767443B (en) * | 2018-05-29 | 2021-03-09 | Oppo广东移动通信有限公司 | Antenna device and electronic equipment |
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| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140416 |
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| RJ01 | Rejection of invention patent application after publication |