CN102694238A - Multiband antenna - Google Patents
Multiband antenna Download PDFInfo
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- CN102694238A CN102694238A CN2012101630362A CN201210163036A CN102694238A CN 102694238 A CN102694238 A CN 102694238A CN 2012101630362 A CN2012101630362 A CN 2012101630362A CN 201210163036 A CN201210163036 A CN 201210163036A CN 102694238 A CN102694238 A CN 102694238A
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- frequency range
- inductance
- analog switch
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Abstract
The invention provides a multiband antenna. The multiband antenna comprises an antenna feeder point, a multiband antenna oscillator and a frequency band switching circuit, wherein the antenna feeder point is connected with an active circuit on a PCB (Printed Circuit Board), and the frequency band switching circuit is connected between the antenna oscillators on each band in series. According to the multiband antenna, the frequency band switching is performed by the frequency band switching circuit, so that the space occupied by the multiband antenna is greatly reduced, and the performances of the antenna are greatly improved; simultaneously, the multiband antenna has the advantages of being simple in structure and easy to realize.
Description
Technical field
The present invention relates to the antenna for mobile phone field, relate in particular to a kind of multifrequency antenna.
Background technology
In recent years; Along with mechanics of communication is maked rapid progress; Become a part indispensable in the modern life like wireless communication apparatus such as mobile phones, added the frequent dealing between the people's business of countries in the world, become one of indispensable function of mobile phone so can receive/transmit the multiband radio signal.
Yet because the various places wireless communication standards is different, existing mobile phone reception antenna adopts a plurality of frequency range branch, the corresponding working frequency range of each branch when the reply multifrequency is used.
But more its shared spaces of frequency range are just many more, are unfavorable for the product miniaturization, and problem is more outstanding in end product.
The present invention demand urgently seeking a kind of solution multifrequency antenna take up room many, the way that small product size is big.
Summary of the invention
The object of the present invention is to provide a kind of multifrequency antenna, carry out frequency range through the frequency range commutation circuit and switch, make multifrequency antenna take up space and significantly reduce.
Another object of the present invention is to provide a kind of multifrequency antenna, its have simple in structure, be easy to advantages such as realization.
The objective of the invention is to realize through following technical scheme.
A kind of multifrequency antenna comprises: be used for pcb board on the active circuit antenna feed point, the multistage antenna oscillator that are connected, and be connected on the frequency range commutation circuit between each section antenna oscillator.
Preferably, said frequency range commutation circuit comprises the LC shunt circuit of being made up of inductance and electric capacity.
Preferably, said frequency range commutation circuit is made up of electric capacity, analog switch and the electric capacity of series connection successively.
Preferably, said frequency range commutation circuit comprises: first electric capacity, diode, second electric capacity, first inductance, second inductance, analog switch, resistance; The one termination radio frequency input of first electric capacity, the other end links to each other with the anode of diode, and the negative electrode of diode connects radio frequency output through second electric capacity; The anode of first inductance, one terminating diode, another termination first power end; The negative electrode of second inductance, one terminating diode, another termination analog switch, the first gating termination second source end of analog switch, its second gating end resistance grounded.
Preferably, said analog switch is a single-pole double-throw switch (SPDT).
Preferably, said second source end is the direct voltage that is higher than the first power end amplitude.
The embodiment of the invention compared with prior art, the present invention carries out frequency range through the frequency range commutation circuit and switches, and makes the multifrequency antenna significantly reduction that takes up space, and has improved antenna performance; Simultaneously, its have simple in structure, be easy to advantages such as realization.
Description of drawings
Fig. 1 is that multifrequency antenna of the present invention is formed sketch map.
Fig. 2 is first kind of frequency range commutation circuit schematic diagram.
Fig. 3 is second kind of frequency range commutation circuit schematic diagram.
Fig. 4 is the third frequency range commutation circuit schematic diagram.
Embodiment
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
See also shown in Figure 1ly, multifrequency antenna of the present invention comprises: be used for pcb board on the active circuit antenna feed point, first antenna oscillator, second antenna oscillator that are connected, and be connected on the frequency range commutation circuit between first antenna oscillator and second antenna oscillator.
Among the present invention, antenna oscillator is divided into two sections (situation of multistage is similar, does not give unnecessary details) by the frequency range commutation circuit, and when the conducting of frequency range commutation circuit, antenna is operated in certain frequency range; And when the frequency range commutation circuit was ended, antenna was operated in another frequency range, and the oscillator cabling of high and low frequency has partial common.
Concrete frequency range commutation circuit realizes that following three kinds of modes are arranged, and sees also shown in Fig. 2-4.
See also shown in Figure 2ly, comprising: inductance L 1, capacitor C 1, inductance L 1 and capacitor C 1 parallelly connected back one termination, first antenna oscillator, another termination second electric wire oscillator.
Among Fig. 2, the frequency range commutation circuit constitutes with the LC shunt circuit, and resonance frequency is positioned near the center frequency point of certain frequency range of antenna work.Resonant tank is equivalent to open circuit at the resonance frequency, and is short circuit in the frequency equivalence away from resonance point.
See also shown in Figure 3ly, comprising: capacitor C 1, analog switch S1 and the capacitor C 2 of series connection successively, its two ends, series connection back connect first antenna oscillator and second antenna oscillator respectively.
Among Fig. 3, the frequency range commutation circuit realizes that with analog switch the different strobe state decision antenna of analog switch is operated in different frequency range.
See also shown in Figure 4ly, comprising: capacitor C 1, diode D1, capacitor C 2, inductance L 1, inductance L 2, analog switch S1, resistance R 1; One termination, first antenna oscillator of capacitor C 1, the other end links to each other with the anode of diode D1, and the negative electrode of diode D1 connects second antenna oscillator through capacitor C 2; The anode of inductance L 1 one terminating diode D1, another termination power end V1; The negative electrode of inductance L 2 one terminating diode D1, another termination analog switch S1, the first gating termination power end V2 of analog switch S1, its second gating end is through resistance R 1 ground connection.
Among Fig. 3, the frequency range commutation circuit constitutes with diode, the auxiliary completion logic control of active auxiliary circuit.Diode current flow and closed condition be the different operating frequency range of respective antenna respectively, and under this embodiment, for guaranteeing that diode reliably ends, the present invention takes diode is applied the method for negative pressure biasing, promptly with applying reverse voltage.During switch S 1 gating R1, V1, L1, L2 and R1 make its conducting for diode D1 provides suitable biasing; V2 is the direct voltage that is higher than the V1 amplitude, and when S1 gating V2, D1 is reverse biased and ends.
Above-mentioned analog switch is single-pole double-throw switch (SPDT) or the switch with same function.
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. a multifrequency antenna is characterized in that, comprising: be used for pcb board on the active circuit antenna feed point, the multistage antenna oscillator that are connected, and be connected on the frequency range commutation circuit between each section antenna oscillator.
2. multifrequency antenna as claimed in claim 1 is characterized in that, said frequency range commutation circuit comprises the LC shunt circuit of being made up of inductance and electric capacity.
3. multifrequency antenna as claimed in claim 1 is characterized in that, said frequency range commutation circuit is made up of electric capacity, analog switch and the electric capacity of series connection successively.
4. multifrequency antenna as claimed in claim 1 is characterized in that, said frequency range commutation circuit comprises: first electric capacity, diode, second electric capacity, first inductance, second inductance, analog switch, resistance; The one termination radio frequency input of first electric capacity, the other end links to each other with the anode of diode, and the negative electrode of diode connects radio frequency output through second electric capacity; The anode of first inductance, one terminating diode, another termination first power end; The negative electrode of second inductance, one terminating diode, another termination analog switch, the first gating termination second source end of analog switch, its second gating end resistance grounded.
5. like claim 3 or 4 described multifrequency antennas, it is characterized in that said analog switch is a single-pole double-throw switch (SPDT).
6. multifrequency antenna as claimed in claim 4 is characterized in that, said second source end is the direct voltage that is higher than the first power end amplitude.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101630362A CN102694238A (en) | 2012-05-24 | 2012-05-24 | Multiband antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101630362A CN102694238A (en) | 2012-05-24 | 2012-05-24 | Multiband antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102694238A true CN102694238A (en) | 2012-09-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101630362A Pending CN102694238A (en) | 2012-05-24 | 2012-05-24 | Multiband antenna |
Country Status (1)
| Country | Link |
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| CN (1) | CN102694238A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103401081A (en) * | 2013-08-09 | 2013-11-20 | 上海华勤通讯技术有限公司 | Synthetic antenna system and mobile phone employing same |
| CN104716432A (en) * | 2015-03-13 | 2015-06-17 | 昆山睿翔讯通通信技术有限公司 | Frequency-band-switchable antenna with switch |
| CN110739534A (en) * | 2018-07-19 | 2020-01-31 | 华硕电脑股份有限公司 | Antenna device and control method thereof |
| WO2021129734A1 (en) * | 2019-12-24 | 2021-07-01 | 中兴通讯股份有限公司 | Half-wave oscillator, half-wave oscillator assembly and antenna |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001326502A (en) * | 2000-05-18 | 2001-11-22 | Mitsubishi Electric Corp | Circuit and method for pin diode switch |
| CN1866619A (en) * | 2005-05-16 | 2006-11-22 | 中兴通讯股份有限公司 | PIFA antenna with LC resonant circuit and implementing method thereof |
| CN101123325A (en) * | 2007-07-27 | 2008-02-13 | 深圳华为通信技术有限公司 | Multi-frequency band antenna and method for realizing multi-frequency band antenna |
-
2012
- 2012-05-24 CN CN2012101630362A patent/CN102694238A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001326502A (en) * | 2000-05-18 | 2001-11-22 | Mitsubishi Electric Corp | Circuit and method for pin diode switch |
| CN1866619A (en) * | 2005-05-16 | 2006-11-22 | 中兴通讯股份有限公司 | PIFA antenna with LC resonant circuit and implementing method thereof |
| CN101123325A (en) * | 2007-07-27 | 2008-02-13 | 深圳华为通信技术有限公司 | Multi-frequency band antenna and method for realizing multi-frequency band antenna |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103401081A (en) * | 2013-08-09 | 2013-11-20 | 上海华勤通讯技术有限公司 | Synthetic antenna system and mobile phone employing same |
| CN104716432A (en) * | 2015-03-13 | 2015-06-17 | 昆山睿翔讯通通信技术有限公司 | Frequency-band-switchable antenna with switch |
| CN110739534A (en) * | 2018-07-19 | 2020-01-31 | 华硕电脑股份有限公司 | Antenna device and control method thereof |
| WO2021129734A1 (en) * | 2019-12-24 | 2021-07-01 | 中兴通讯股份有限公司 | Half-wave oscillator, half-wave oscillator assembly and antenna |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120926 |