CN202797196U - Duplexer - Google Patents
Duplexer Download PDFInfo
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- CN202797196U CN202797196U CN 201220365443 CN201220365443U CN202797196U CN 202797196 U CN202797196 U CN 202797196U CN 201220365443 CN201220365443 CN 201220365443 CN 201220365443 U CN201220365443 U CN 201220365443U CN 202797196 U CN202797196 U CN 202797196U
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- 238000010521 absorption reaction Methods 0.000 claims abstract description 7
- 230000005540 biological transmission Effects 0.000 claims description 39
- 230000008878 coupling Effects 0.000 claims description 7
- 238000010168 coupling process Methods 0.000 claims description 7
- 238000005859 coupling reaction Methods 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 2
- 238000002955 isolation Methods 0.000 abstract description 9
- 238000004891 communication Methods 0.000 abstract description 4
- 230000005764 inhibitory process Effects 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000006880 cross-coupling reaction Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
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Abstract
The utility model is applied to the communication technology field and provides a duplexer, comprising an emission channel, a receiving channel and an absorption resonant cavity arranged on an antenna interface of the duplexer. According to the duplexer provided by the utility model, improving a mutual inhibition condition of the emission channel and the receiving channel of the duplexer is realized and emission and receiving port isolation of the duplexer is raised.
Description
Technical field
The utility model relates to communication technical field, relates in particular to a kind of duplexer.
Background technology
Duplexer is requisite device in the communication system.Referring to Fig. 1, duplexer is by receive path and transmission channel and (Receive receives) band pass filter 2 of RX wherein and TX (Transmit sends) band pass filter 3 compositions.One end of RX band pass filter 2 and TX band pass filter 3 is connected in ANT (antennal interface) port one, and the other end is connected to RX port 4 and TX port 5.The isolation that port is is namely received and dispatched in mutual inhibition between transceiver channel is its important technical indicator, and filter with low insertion loss, high inhibition, miniaturization, lightweight are the current development trends of duplexer.For this reason, extensively adopt cross-couplings to introduce transmission zero in the present duplexer, improve the performance of duplexer.
Along with the day of frequency spectrum resource is becoming tight, communication system also improves constantly the requirement of the mutual inhibition between the duplexer transceiver channel, and the mode of traditional cross-couplings introducing transmission zero will be highlighted by the shortcoming of filter order and topological structure restriction day by day.
In summary, existing duplexer technology obviously exists inconvenience and defective in actual use, so be necessary to be improved.
The utility model content
For above-mentioned defective, the purpose of this utility model is to provide a kind of duplexer, and situation about mutually suppressing to improve the duplexer transceiver channel improves duplexer transmitting-receiving interport isolation.
In order to realize the foregoing invention purpose, the utility model provides a kind of duplexer, comprises transmission channel and receive path, and described duplexer also comprises:
Absorb resonant cavity, be arranged at the antennal interface of described duplexer.
According to described duplexer, described absorption resonant cavity is arranged between described transmission channel and the receive path.
According to described duplexer, the transmission means of the antennal interface of described duplexer is T-shaped coupled transmission line or public resonant cavity.
According to described duplexer, be provided with resonant rod in the described absorption resonant cavity.
According to described duplexer, on the corresponding cover plate of described resonant rod the resonance tuning screw is set.
According to described duplexer, described resonant rod is the metal resonant rod.
According to described duplexer, be provided with the coupling tuning screw between described absorption resonant cavity and the described public resonant cavity.
According to described duplexer, be provided with transmit band pass filter on the described transmission channel; Be provided with reception bandpass filter on the described receive path.
According to described duplexer, described duplexer is the coaxial resonant cavity duplexer.
The utility model absorbs resonant cavity by add one at duplexer antenna end common port place, strong and weak by resonance frequency and the coupling of regulating this chamber, respectively generate a transmission zero at the duplexer transceiver channel, all on the frequency range between two passbands, thereby reach and improve transceiver channel and mutually suppress, improve the purpose of transmitting-receiving interport isolation.Compare with the method for passing through cross-couplings introducing transmission zero of present extensive use, the method of the utility model introducing transmission zero is not subjected to the restriction of exponent number and the topological structure of filter, and once can introduce two transmission zeros, has flexible, efficient advantage, can be used as effectively replenishing of conventional method, improving the duplexer isolation performance and avoiding the aspect such as tower amplifier self-excitation that larger application prospect is arranged.
Description of drawings
Fig. 1 is the principle schematic of duplexer of the prior art;
Fig. 2 is the principle schematic that adopts the utility model duplexer;
Fig. 3 is the application schematic diagram of the duplexer that provides of the utility model the first embodiment;
Fig. 4 is the application schematic diagram of the duplexer that provides of the utility model the second embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
Referring to Fig. 2～Fig. 4, in the utility model, provide a kind of duplexer 100, comprise transmission channel 10 and receive path 20, duplexer 100 also comprises:
Absorb resonant cavity 30, be arranged at the antennal interface 40 of duplexer 100.
Compare with existing diplexer structure, this embodiment proposes a kind of diplexer structure that mutually suppresses between duplexer two passbands that improves.Add one by antennal interface 40 parts at duplexer 100 and absorb resonant cavity 30, be arranged between transmission channel 10 and the receive path 20, be provided with transmit band pass filter 102 on the transmission channel 10; Be provided with reception bandpass filter 202 on the receive path 20.Absorb resonant cavity 30 and can respectively introduce a transmission zero at transmission channel 10 and receive path 20 simultaneously, two transmission zeros are in equal frequency ranges between transmission channel 10 and receive path 20, thereby reach and improve transceiver channel and mutually suppress, improve the purpose of receiving port 201 and emission port 101 isolations.
Corresponding with the coupled modes of duplexer antenna opening, the utility model has two kinds of embodiments, the execution mode when being respectively the T-shaped transmission line of antennal interface 40 employings, as shown in Figure 3; And the execution mode of the public resonant cavity of antennal interface 40 employings, as shown in Figure 4.
Referring to Fig. 3, in the first embodiment of the present utility model, duplexer 100 antennal interfaces 40 adopt T-shaped transmission line to realize the execution mode of public port coupling.The antennal interface 40 of duplexer 100 is connected with receive path by T-shaped coupled transmission line 51 and transmission channel 10 and is connected.Absorb in the resonant cavity 30 and be provided with resonant rod 60.Resonant rod 60 is connected by coupled transmission line 50 with T-shaped coupled transmission line 51, on the resonant rod 60 corresponding cover plates resonance tuning screw 70 is set.Regulate resonance tuning screw 70 and can control the frequency of transmission zero, change shape or the wire diameter of coupled transmission line 50, can control the power of transmission zero, thereby realize Out-of-band rejection that flexible is required or the purpose of isolation.
Referring to Fig. 4, in the second embodiment of the present utility model, duplexer 100 antennal interfaces 40 adopt the execution mode of public resonant cavity; Different from a upper embodiment is, adopts coupling tuning screw 90 to replace coupled transmission line 50 among this embodiment, and this coupling tuning screw 90 is arranged at and absorbs between resonant cavity 30 and the public resonant cavity 80, by its power of tuning transmission zero more easily.。
In sum, the utility model absorbs resonant cavity by add one at duplexer antenna end common port place, strong and weak by resonance frequency and the coupling of regulating this chamber, respectively generate a transmission zero at the duplexer transceiver channel, all on the frequency range between two passbands, thereby reach and improve transceiver channel and mutually suppress, improve the purpose of transmitting-receiving interport isolation.Compare with the method for passing through cross-couplings introducing transmission zero of present extensive use, the method of the utility model introducing transmission zero is not subjected to the restriction of exponent number and the topological structure of filter, and once can introduce two transmission zeros, has flexible, efficient advantage, can be used as effectively replenishing of conventional method, improving the duplexer isolation performance and avoiding the aspect such as tower amplifier self-excitation that larger application prospect is arranged.
Certainly; the utility model also can have other various embodiments; in the situation that does not deviate from the utility model spirit and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the utility model, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the utility model.
Claims (9)
1. a duplexer comprises transmission channel and receive path, it is characterized in that, described duplexer also comprises:
Absorb resonant cavity, be arranged at the antennal interface of described duplexer.
2. duplexer according to claim 1 is characterized in that, described absorption resonant cavity is arranged between described transmission channel and the receive path.
3. duplexer according to claim 1 is characterized in that, the transmission means of the antennal interface of described duplexer is T-shaped coupled transmission line or public resonant cavity.
4. duplexer according to claim 3 is characterized in that, is provided with resonant rod in the described absorption resonant cavity.
5. duplexer according to claim 4 is characterized in that, on the corresponding cover plate of described resonant rod the resonance tuning screw is set.
6. duplexer according to claim 4 is characterized in that, described resonant rod is the metal resonant rod.
7. duplexer according to claim 3 is characterized in that, is provided with the coupling tuning screw between described absorption resonant cavity and the described public resonant cavity.
8. duplexer according to claim 1 is characterized in that, is provided with transmit band pass filter on the described transmission channel; Be provided with reception bandpass filter on the described receive path.
9. duplexer according to claim 1 is characterized in that, described duplexer is the coaxial resonant cavity duplexer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220365443 CN202797196U (en) | 2012-07-26 | 2012-07-26 | Duplexer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220365443 CN202797196U (en) | 2012-07-26 | 2012-07-26 | Duplexer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202797196U true CN202797196U (en) | 2013-03-13 |
Family
ID=47824393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220365443 Expired - Fee Related CN202797196U (en) | 2012-07-26 | 2012-07-26 | Duplexer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202797196U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020093881A1 (en) * | 2018-11-07 | 2020-05-14 | 阿里巴巴集团控股有限公司 | Internet of things duplexer |
-
2012
- 2012-07-26 CN CN 201220365443 patent/CN202797196U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020093881A1 (en) * | 2018-11-07 | 2020-05-14 | 阿里巴巴集团控股有限公司 | Internet of things duplexer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20130313 Termination date: 20210726 |