CN2292330Y - Band-pass diplexer composed of band-pass band-reject filter - Google Patents
Band-pass diplexer composed of band-pass band-reject filter Download PDFInfo
- Publication number
- CN2292330Y CN2292330Y CN 97209479 CN97209479U CN2292330Y CN 2292330 Y CN2292330 Y CN 2292330Y CN 97209479 CN97209479 CN 97209479 CN 97209479 U CN97209479 U CN 97209479U CN 2292330 Y CN2292330 Y CN 2292330Y
- Authority
- CN
- China
- Prior art keywords
- band
- filter
- low frequency
- pass
- band pass
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The utility model relates to a band pass diplexer composed of band pass filters and band stop filters. A high frequency band pass filter (2), a low frequency band pass filter (4), a high frequency band stop filter (3), and a low frequency band stop filter (5) are arranged on a machine frame (1). The two band pass filters connected by a concentric cable (9) are connected in parallel with an antenna jack (10). The two band stop filters connected by a concentric cable (6) are respectively connected to a high frequency input terminal (7) and a low frequency input terminal (8). The utility model has small volume. The performance of the utility model can meet the requirements of small inner insertion damage, outside interference of the stop band, and wide passband.
Description
The utility model relates to a kind of band general formula duplexer.
Be divided into band resistance formula and be with two kinds of general formulas with the duplexer that firmly is used for the radio duplex signaling.The passband broad of band resistance formula duplexer, stopband is narrower, and is very poor to dried inhibition of scratching signal.Though the band general formula can suppress dried scratching, stopband can not satisfy the requirement of isolation again.Though can improve isolation by strengthening cavity volume, but the narrow problem of pass band width occur.Therefore, application number is that 972093923 utility model " a kind of microstrip-type band passband resistance duplexer " has been made improvement to this, promptly connect cavity and the low pass filter of being furnished with high frequency filter with microstrip line, form a kind of microstrip-type band passband resistance duplexer, both reduced volume, again can the inhibition zone external signal is dried have scratched.But band resistance formula filter or band general formula filter that the front end of above-mentioned duplexer and low frequency end are made up of microstrip line and discrete component respectively still are difficult to satisfy modern communication to the high standard requirement with interior Insertion Loss and attenuation outside a channel.
The purpose of this utility model provides a kind of band general formula duplexer that all adopts bandpass and band-rejection filter at front end and low frequency end.The filter that this band general formula duplexer is adopted be examine please number be described in 972093915 " improving the bandpass and band-rejection filter of bandpass filtering inhibitions degree " and, thereby the volume of duplexer is further dwindled and can satisfy on the performance in the band that Insertion Loss is little, driedly outside the inhibition zone scratch and solve common bandwidth problem.For achieving the above object, the technical solution of the utility model is:
Go up device in frame (1) high freguency bandpass filter (2), band stop filter (3) and low frequency bandpass filter (4), band stop filter (5) are arranged.Every group of band pass filter links to each other by coaxial cable (6) with band stop filter.The high frequency band stop filter links to each other with high frequency input terminal (7), and the low frequency band stop filter links to each other with low frequency input terminal (8), and the band pass filter at two ends links to each other with connection socket for antenna (10) by coaxial cable (9).Thereby constitute the band general formula duplexer of forming by bandpass and band-rejection filter.
As an embodiment, the described frame of scheme (1) is a drawer shape brandreth, and cavity is all done with aluminium alloy in band pass filter (2), (4) and band stop filter (3), (5), built-in screw type or calandria filter.Coaxial cable (6)), (9) all adopt 50 Europe coaxial cables, output plug terminal and socket (7), (8), (10) all are the special-purpose sockets of brass porcelain core nickel plating coaxial cable.
Claims (1)
1, a kind of band general formula duplexer of being made up of bandpass and band-rejection filter is characterized in that being equipped with high freguency bandpass filter (2) and high frequency band stop filter (3), low frequency bandpass filter (4) and low frequency band stop filter (5) on frame (1); Band pass filter all has coaxial cable (6) to link to each other with band stop filter; After linking to each other with coaxial cable (9), two band pass filters connect connection socket for antenna (10); Two band stop filters connect high frequency input terminal (7) and low frequency input terminal (8) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97209479 CN2292330Y (en) | 1997-03-24 | 1997-03-24 | Band-pass diplexer composed of band-pass band-reject filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97209479 CN2292330Y (en) | 1997-03-24 | 1997-03-24 | Band-pass diplexer composed of band-pass band-reject filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2292330Y true CN2292330Y (en) | 1998-09-23 |
Family
ID=33928659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97209479 Expired - Fee Related CN2292330Y (en) | 1997-03-24 | 1997-03-24 | Band-pass diplexer composed of band-pass band-reject filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2292330Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106711555A (en) * | 2016-12-08 | 2017-05-24 | 江苏贝孚德通讯科技股份有限公司 | AWS/PCS duplexer realized by bandpass and band stop |
-
1997
- 1997-03-24 CN CN 97209479 patent/CN2292330Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106711555A (en) * | 2016-12-08 | 2017-05-24 | 江苏贝孚德通讯科技股份有限公司 | AWS/PCS duplexer realized by bandpass and band stop |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |