CN206293622U - A kind of antenna with impedance matching circuit - Google Patents
A kind of antenna with impedance matching circuit Download PDFInfo
- Publication number
- CN206293622U CN206293622U CN201621486365.0U CN201621486365U CN206293622U CN 206293622 U CN206293622 U CN 206293622U CN 201621486365 U CN201621486365 U CN 201621486365U CN 206293622 U CN206293622 U CN 206293622U
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- China
- Prior art keywords
- antenna
- impedance matching
- matching circuit
- antenna body
- point
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Abstract
The utility model discloses a kind of antenna with impedance matching circuit, impedance matching circuit including antenna body, switch module and for changing antenna body original impedance, the antenna body includes distributing point and earth point, the earth point is grounded after being connected with switch module, the distributing point is connected with impedance matching circuit, and the impedance matching circuit other end is used to be connected with radio circuit.The utility model adjusts the original antenna impedance of antenna body by increasing impedance matching circuit in antenna body, to improve the frequency deviation problem that duplexer occurs when frequency range is switched, antenna is changed its cabling form or its structure can improve frequency deviation problem.
Description
Technical field
The utility model is related to wireless transmission field, more particularly to a kind of antenna with impedance matching circuit.
Background technology
Now with the development of 4G, the frequency range of antenna requirement is more and more, causes antenna for mobile phone needs less and less
Spatially meet frequency band increasingly wider.Duplexer is exactly a good solution for solving low frequency bandwidth problem, is led to
Cross the Antenna Operation state that switching is connected between antenna and rf processing circuitry（Frequency range, reception state, emission state）To reach
In the use of different frequency bands, but in practical application duplexer, switch is difficult to be displaced in preferable frequency band antenna, and its is inclined
Move on to inefficient in preferable bandwidth.Current solution is the shape and position by adjusting PIFA antennas, PIFA
The structure design of antenna and antenna holder, antenna holder and on printed circuit board the design of installation site change the original of antenna
Beginning impedance, is allowed to after frequency range is switched, and antenna frequency is displaced in preferable bandwidth, but this kind of solution is in different equipment
On, because space structure is different, it is required to redesign, it is unfavorable for actual use.
Utility model content
Main purpose of the present utility model is to provide a kind of antenna with impedance matching circuit, it is intended to allow antenna straight
Connect and be used in different device structures, the structure without redesigning antenna.
To achieve the above object, the utility model provides a kind of antenna with impedance matching circuit, including antenna body, opens
Module and the impedance matching circuit for changing antenna body original impedance are closed, the antenna body includes distributing point and ground connection
Point, the earth point is grounded after being connected with switch module, and the distributing point is connected with impedance matching circuit, the impedance matching electricity
The road other end is used to be connected with radio circuit.
Preferably, the impedance matching circuit include inductance and electric capacity, the distributing point respectively with inductance and capacitance connection,
The other end ground connection of the inductance, the other end of the electric capacity is used to be connected with radio circuit.
Preferably, the inductance is 10-20nh, and the electric capacity is 2.2-5.6pf.
Preferably, the antenna body is PIFA antennas, and the PIFA antennas also include open circuit point.
Preferably, the antenna body is slot antenna.
Preferably, the switch module is four-way switch module.
The utility model adjusts the original antenna impedance of antenna body by increasing impedance matching circuit in antenna body,
To improve duplexer frequency deviation problem for occurring when frequency range is switched, make that antenna need not change its cabling form or its structure is equal
Frequency deviation problem can be improved.
Brief description of the drawings
Fig. 1 is the structural representation of the embodiment of the utility model PIFA antennas one；
Fig. 2 is the circuit diagram of Fig. 1 breaker in middle modules；
Description of reference numerals：1 is antenna body, and 11 is earth point, and 12 is distributing point, and 13 is open circuit point, and 2 is switching molding
Block, 3 is impedance matching circuit.
The realization of the utility model purpose, functional characteristics and advantage will be described further referring to the drawings in conjunction with the embodiments.
Specific embodiment
It should be appreciated that specific embodiment described herein is only used to explain the utility model, it is not used to limit this
Utility model.
A kind of antenna with impedance matching circuit of the utility model offer, reference picture 1, in the first embodiment, the antenna
Impedance matching circuit including antenna body, switch module and for changing antenna body original impedance, the antenna body bag
Distributing point and earth point are included, the earth point is grounded after being connected with switch module, and the distributing point is connected with impedance matching circuit,
The impedance matching circuit other end is used to be connected with radio circuit.
Before not connected impedance matching circuit, switch module is over the ground and electric in antenna body equivalent circuit on the ground
Sense or simultaneously electric capacity, not substantially, specially antenna body is over the ground and inductance can be toward low frequency partially, and antenna body is over the ground for reflectance factor change
And electric capacity can just be not easy to fall in preferable bandwidth toward frequency deviation high, so switch in switching, it is therefore desirable to change original day
The impedance of line, changes switch module in antenna body equivalent circuit on the ground.The present embodiment is by the feed in antenna body
End increases impedance matching circuit to adjust the impedance of antenna body, and then changes antenna body equivalent circuit on the ground for over the ground
The form of string inductance and electric capacity.
Reference picture 1, based on first embodiment, in a second embodiment, a kind of implementation method of impedance matching circuit can be：
Impedance matching circuit include inductance and electric capacity, distributing point respectively with inductance and capacitance connection, another termination of inductance
Ground, the other end of electric capacity is used to be connected with radio circuit.By the impedance matching circuit adjust after, antenna body it is on the ground etc.
Effect circuit is string inductance and electric capacity over the ground, and the reflectance factor change of antenna is obvious, in the easy frequency deviation of antenna to preferable frequency band.
Above-mentioned inductance is 10-20nh, and electric capacity is 2.2-5.6pf, and antenna body can be PIFA antennas or slot antenna, the same day
When line body is PIFA antennas, open circuit point is additionally provided with.
Reference picture 2, based on above-described embodiment, in the third embodiment, above-mentioned switch module is four-way switch module, is passed through
Processor sends the on off state in instruction control four-way switch module.
Preferred embodiment of the present utility model is these are only, the scope of the claims of the present utility model is not thereby limited, it is every
The equivalent structure or equivalent flow conversion made using the utility model specification and accompanying drawing content, or be directly or indirectly used in
Other related technical fields, are similarly included in scope of patent protection of the present utility model.
Claims (6)
1. a kind of antenna with impedance matching circuit, it is characterised in that including antenna body, switch module and for changing antenna
The impedance matching circuit of body original impedance, the antenna body includes distributing point and earth point, the earth point and switching molding
It is grounded after block connection, the distributing point is connected with impedance matching circuit, the impedance matching circuit other end is used for and radio frequency electrical
Road connects.
2. antenna as claimed in claim 1, it is characterised in that the impedance matching circuit includes inductance and electric capacity, the feedback
Electricity point respectively with inductance and capacitance connection, the other end of the inductance is grounded, and the other end of the electric capacity is used for and radio circuit
Connection.
3. antenna as claimed in claim 2, it is characterised in that the inductance is 10-20nh, the electric capacity is 2.2-5.6pf.
4. antenna as claimed in claim 1, it is characterised in that the antenna body is PIFA antennas, and the PIFA antennas are also
Including open circuit point.
5. antenna as claimed in claim 1, it is characterised in that the antenna body is slot antenna.
6. antenna as claimed in claim 1, it is characterised in that the switch module is four-way switch module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621486365.0U CN206293622U (en) | 2016-12-31 | 2016-12-31 | A kind of antenna with impedance matching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621486365.0U CN206293622U (en) | 2016-12-31 | 2016-12-31 | A kind of antenna with impedance matching circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206293622U true CN206293622U (en) | 2017-06-30 |
Family
ID=59097257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621486365.0U Expired - Fee Related CN206293622U (en) | 2016-12-31 | 2016-12-31 | A kind of antenna with impedance matching circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206293622U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107819199A (en) * | 2017-09-28 | 2018-03-20 | 上海传英信息技术有限公司 | Antenna attachment structure and terminal |
| CN108063307A (en) * | 2017-12-14 | 2018-05-22 | 广东欧珀移动通信有限公司 | Antenna tuning circuit and mobile terminal |
| CN109560364A (en) * | 2017-09-27 | 2019-04-02 | 深圳富泰宏精密工业有限公司 | Antenna structure and wireless communication device with the antenna structure |
| CN109962329A (en) * | 2017-12-22 | 2019-07-02 | 华为技术有限公司 | A kind of antenna and communication device |
| WO2019184748A1 (en) * | 2018-03-31 | 2019-10-03 | Oppo广东移动通信有限公司 | Electronic device |
| CN111224221A (en) * | 2020-01-14 | 2020-06-02 | 宇龙计算机通信科技(深圳)有限公司 | Antenna structure and terminal |
| CN111355015A (en) * | 2018-12-24 | 2020-06-30 | 北京小米移动软件有限公司 | Mobile terminal |
-
2016
- 2016-12-31 CN CN201621486365.0U patent/CN206293622U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109560364A (en) * | 2017-09-27 | 2019-04-02 | 深圳富泰宏精密工业有限公司 | Antenna structure and wireless communication device with the antenna structure |
| CN107819199A (en) * | 2017-09-28 | 2018-03-20 | 上海传英信息技术有限公司 | Antenna attachment structure and terminal |
| CN108063307A (en) * | 2017-12-14 | 2018-05-22 | 广东欧珀移动通信有限公司 | Antenna tuning circuit and mobile terminal |
| CN109962329A (en) * | 2017-12-22 | 2019-07-02 | 华为技术有限公司 | A kind of antenna and communication device |
| WO2019184748A1 (en) * | 2018-03-31 | 2019-10-03 | Oppo广东移动通信有限公司 | Electronic device |
| CN111355015A (en) * | 2018-12-24 | 2020-06-30 | 北京小米移动软件有限公司 | Mobile terminal |
| CN111224221A (en) * | 2020-01-14 | 2020-06-02 | 宇龙计算机通信科技(深圳)有限公司 | Antenna structure and terminal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170630 Termination date: 20201231 |