CN204029959U - A kind of L-X wave band high degree of suppression cavity duplexer - Google Patents
A kind of L-X wave band high degree of suppression cavity duplexer Download PDFInfo
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- CN204029959U CN204029959U CN201420348244.4U CN201420348244U CN204029959U CN 204029959 U CN204029959 U CN 204029959U CN 201420348244 U CN201420348244 U CN 201420348244U CN 204029959 U CN204029959 U CN 204029959U
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- pass filter
- duplexer
- band pass
- type band
- high degree
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- 230000001629 suppression Effects 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 3
- 238000012360 testing method Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005764 inhibitory process Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000013100 final test Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
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Abstract
The utility model provides a kind of L-X wave band high degree of suppression cavity duplexer, and this duplexer comprises: broadband type band pass filter, an arrowband type band pass filter and a low pass filter.The duplexer that the utility model provides, by introducing the low pass filter of a high degree of suppression, making it be connected with broadband type band pass filter, being namely connected with low-frequency filter, in order to reach the object suppressing high frequency.
Description
Technical field
The utility model relates to electronic technology field, is specifically related to a kind of L-X wave band high degree of suppression cavity duplexer.
Background technology
Microwave diplexer a kind ofly specially shares the problem of an antenna and the microwave passive component that designs for solving sending and receiving, is generally divided into two types: transmit-receive switch and frequency range duplexer.The former is mainly used in time-multiplexed radar system, and when launching, it connects antenna and transmitter, and disconnects receiver; When receiving, it connects antenna and receiver, and disconnects transmitter.The radiofrequency signal of two frequency ranges transmits and receives by same portion antenna by the latter respectively, and there is between different frequency range good isolation characteristic, can reliability be improved in radar and the communication technology, improve anti-interference and improve confidentiality, acting on more outstanding.Therefore the range of application of frequency range duplexer is more extensive, can be used for microwave radio relay communication, satellite communication, microwave measurement etc.
Compared with the filter that design one is independent, the impedance matching of common port during design duplexer, should be considered.This is because the some filters in duplexer and T connector can introduce larger reactance in another filter passband, destroys the original pass-band performance of filter, can cause common port impedance mismatch after two filters are connected.This common port impedance mismatch characteristic two filters frequency relatively far apart time performance particularly evident.
Therefore, for the duplexer of frequency two filter compositions relatively far apart, the parasitic passband of its low-frequency filter likely falls in the passband of high frequency filter, and this adds certain difficulty to realizing high degree of suppression between passband.
Utility model content
(1) technical problem solved
For the deficiencies in the prior art, the utility model provides a kind of L-X wave band high degree of suppression cavity duplexer, by introducing the low pass filter of a high degree of suppression in limited volume, such that its degree of suppression is high, integrated level good.
(2) technical scheme
In order to reach above object, the utility model is achieved by the following technical programs:
A kind of L-X wave band high degree of suppression cavity duplexer, the circuit structure of this duplexer comprises: broadband type band pass filter, an arrowband type band pass filter and a low pass filter;
One end of described broadband type band pass filter is connected with one end of described low pass filter, the other end of described broadband type band pass filter is connected with one end of described arrowband type band pass filter, the indirect common port of described broadband type band pass filter and described arrowband type band pass filter, another termination low frequency output of described low pass filter, another termination high frequency output end of described arrowband type band pass filter.
Wherein, described circuit structure is arranged in a housing.
Wherein, described common port, described low frequency output and described high frequency output end are arranged on housing.
Wherein, described housing is metal shell.
Wherein, silver-plated process is carried out to the described housing except terminal.
Wherein, two passbands of described duplexer all adopt the cavity body structure of coaxial type
(3) beneficial effect
The utility model has following beneficial effect at least:
Duplexer provided by the invention, by introducing the low pass filter of a high degree of suppression, making it be connected with broadband type band pass filter, being namely connected with low-frequency filter, suppresses the object of high frequency in order to reach low-frequency filter.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these figure.
Fig. 1 is the circuit diagram of a kind of L-X wave band high degree of suppression cavity duplexer that the embodiment of the present invention provides;
Fig. 2 is vertical view and the end view of the contour structures of a kind of L-X wave band high degree of suppression cavity duplexer that the embodiment of the present invention provides;
Fig. 3 is the technical parameter of duplexer in Practical Project;
Fig. 4 is the test curve of passband 1 in the embodiment of the present invention;
Fig. 5 is the test curve of passband 2 in the embodiment of the present invention;
Fig. 6 is the suppression curve of passband 1 pair of passband 2 in the embodiment of the present invention;
Fig. 7 is the suppression curve of passband 2 pairs of passbands 1 in the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
See Fig. 1, embodiments provide a kind of circuit structure of L-X wave band high degree of suppression cavity duplexer, this duplexer comprises: broadband type band pass filter 101, low pass filter 102 and arrowband type band pass filter 103.
Wherein, one end of broadband type band pass filter 101 is connected with one end of low pass filter 102, the other end of broadband type band pass filter 101 is connected with one end of arrowband type band pass filter 103, and the indirect common port of broadband type band pass filter 101 and arrowband type band pass filter 103, another termination low frequency output of low pass filter 102, another termination high frequency output end of arrowband type band pass filter 103.
Belong to low-frequency filter due to broadband type band pass filter 101, then introduce low pass filter at the output of low-frequency filter, suppress the object of high frequency in order to reach low-frequency filter.For the consideration to duplexer Insertion Loss and isolation, two passbands all adopt the cavity body structure of coaxial type.
By foregoing circuit structure installment in metal shell as described in Figure 2, and described common port is drawn by an installation terminal on housing, a terminal is installed on the housing described low frequency output is drawn, at described housing, a terminal is installed outward and described high frequency output end is drawn.And can silver-plated process be carried out to the described housing except terminal, can loss be reduced.
As shown in Figure 3, be the technical parameter of duplexer in Practical Project.The effect of the embodiment of the present invention can be embodied by the final testing result of duplexer, as shown in Figure 4, for the test curve of passband in the embodiment of the present invention 1, Fig. 5 is the test curve of embodiment of the present invention passband 2, Fig. 6 is the suppression curve of passband 1 pair of passband 2, can find out that low-frequency filter is fine to the inhibition of high frequency, Fig. 7 is the suppression curve of passband 2 pairs of passbands 1, can find out that the inhibition of high frequency filter to low frequency is fine.Then as can be seen from test result, the performance test of the duplexer that the embodiment of the present invention provides can meet set quota in Fig. 3 and require the instructions for use with user.
Above embodiment only in order to the technical solution of the utility model to be described, is not intended to limit; Although be described in detail the utility model with reference to previous embodiment, those of ordinary skill in the art has been to be understood that; It still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of each embodiment technical scheme of the utility model.
Claims (6)
1. a L-X wave band high degree of suppression cavity duplexer, it is characterized in that, the circuit structure of this duplexer comprises: broadband type band pass filter, an arrowband type band pass filter and a low pass filter;
One end of described broadband type band pass filter is connected with one end of described low pass filter, the other end of described broadband type band pass filter is connected with one end of described arrowband type band pass filter, the indirect common port of described broadband type band pass filter and described arrowband type band pass filter, another termination low frequency output of described low pass filter, another termination high frequency output end of described arrowband type band pass filter.
2. duplexer according to claim 1, is characterized in that, described circuit structure is arranged in a housing.
3. duplexer according to claim 2, is characterized in that, described common port, described low frequency output and described high frequency output end are arranged on housing.
4. duplexer according to claim 3, is characterized in that, described housing is metal shell.
5. duplexer according to claim 4, is characterized in that, carries out silver-plated process to the described housing except terminal.
6. duplexer according to claim 1, is characterized in that, two passbands of described duplexer all adopt the cavity body structure of coaxial type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420348244.4U CN204029959U (en) | 2014-06-26 | 2014-06-26 | A kind of L-X wave band high degree of suppression cavity duplexer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420348244.4U CN204029959U (en) | 2014-06-26 | 2014-06-26 | A kind of L-X wave band high degree of suppression cavity duplexer |
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| Publication Number | Publication Date |
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| CN204029959U true CN204029959U (en) | 2014-12-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420348244.4U Expired - Lifetime CN204029959U (en) | 2014-06-26 | 2014-06-26 | A kind of L-X wave band high degree of suppression cavity duplexer |
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| CN (1) | CN204029959U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110061757A (en) * | 2018-01-18 | 2019-07-26 | 中兴通讯股份有限公司 | A kind of microwave broadband duplexer and microwave transmitting and receiving T unit |
-
2014
- 2014-06-26 CN CN201420348244.4U patent/CN204029959U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110061757A (en) * | 2018-01-18 | 2019-07-26 | 中兴通讯股份有限公司 | A kind of microwave broadband duplexer and microwave transmitting and receiving T unit |
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