CN201466181U - Low noise electrically tunable filter - Google Patents
Low noise electrically tunable filter Download PDFInfo
- Publication number
- CN201466181U CN201466181U CN2009201039751U CN200920103975U CN201466181U CN 201466181 U CN201466181 U CN 201466181U CN 2009201039751 U CN2009201039751 U CN 2009201039751U CN 200920103975 U CN200920103975 U CN 200920103975U CN 201466181 U CN201466181 U CN 201466181U
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- cavity
- electrically tunable
- main body
- low noise
- tunable filter
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Abstract
The utility model discloses a low noise electrically tunable filter, relating to a microwave filter in the communication field. The low noise electrically tunable filter comprises a filter main body (4), a tuning bar (9) and a stepper motor (2); the filter main body (4) is composed of a cavity body (6) and a cover board (7); the filter main body (4) is internally provided with a resonant cavity and a coupling structure (8); the lateral side of the filter main body (4) is provided with a coaxial interface (5) for inputting and outputting signals; the stepper motor (2) is controlled by a drive circuit (1) and is connected with one end of the tuning bar (9) by a driving mechanism (3). The utility model is characterized by low drive noise, easy processing and high tuning preciseness, can realize wide range tuning of frequency after receiving the control signals, and is especially suitable for electrically tunable filter of microwave low frequency channel.
Description
Technical field
The utility model relates to the microwave filter in the communications field, mainly is applicable to the electrically tunable filter that can change operating frequency arbitrarily that uses in the communication system.
Background technology
At present in communication system successful Application a kind of electrically tunable filter, adopt devices such as stepping motor, gear drive on its structure, realize to change the function of operating frequency.But the utility model has certain weak point relatively, and is big as rotational noise, processes loaded down with trivial details.This mainly is because different situations such as the gear-driven accuracy of manufacture, rigidity can produce in various degree vibrations and noise, becomes the main root of parts noise.On the other hand, the processing of the main body of traditional electrically tunable filter is silver soldering technology, and the particularity that the machinery electricity is transferred, the machining accuracy of having relatively high expectations makes production process various, demands strict technology, and is unfavorable for the mass production of product.Therefore the raising day by day that whole set equipment is required along with system reduces machinery noise, shortens production life cycle, simplifies to be processed into inevitable problem.
The utility model content
Technical problem to be solved in the utility model provide a kind of rotational noise little, process easy electrically tunable filter.
For solving the problems of the technologies described above, technical solution adopted in the utility model is:
A kind of low noise electrically tunable filter, comprise filter main body, tuning plug, filter main body is made up of cavity, cover plate, be provided with resonant cavity and coupled structure in the filter main body, the main body side is provided with the coaxial interface of input, output signal, comprise that also stepping motor is connected with an end of tuning plug by transmission mechanism by the stepping motor of drive circuit control.
As improvement of the present utility model, described resonant cavity is 4, is respectively square cavity, becomes matrix pattern to arrange.
As improvement of the present utility model, cavity and coupled structure are processed into integrative-structure, and coupled structure is the rectangular window of offering on the cavity madial wall.
As improvement of the present utility model, cavity and coupled structure are processed into integrative-structure, and coupled structure is the rectangular window of offering on the sidewall of cavity interior resonance chamber.
As improvement of the present utility model, tuning plug is 4, and an end inserts each resonant cavity respectively, becomes matrix pattern to distribute, and direction is parallel with cover plate.
As improvement of the present utility model, transmission mechanism comprises guide plate, support, the wherein integrated processing of cavity in support and the main body in the transmission mechanism.
As improvement of the present utility model, described stepping motor is vertical with guide plate to be installed, and sliding conductor is connected with guide plate is vertical.
As improvement of the present utility model, cover plate is installed on the cavity with securing member.
Owing to adopted technique scheme, the obtained technological progress of the utility model is:
1. the utility model has adopted novel stepping motor, has cancelled gear drive, transmission return difference and the noise effect of having avoided gear drive to bring, improve the frequency tuning precision of electrically tunable filter, and prevent noise pollution, and build the works fine environment, reach system's low noise requirement.
2. the utility model is simplified the annexation in the worm drive, and utilizes ripe now numerical control to mill technology generation for traditional silver soldering when process chamber, has simplified processing technology and drawing, saves operation, has reduced difficulty of processing.
Description of drawings
Fig. 1 is the structural representation of the utility model electrically tunable filter.
Fig. 2 is the structural representation of the utility model main body.
Fig. 3 is the structural representation of the utility model transmission mechanism.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further details:
Fig. 1 is a structural representation of the present utility model, comprises drive circuit 1, stepping motor 2, transmission mechanism 3, filter main body 4 and coaxial interface 5 etc.; The output termination Stepping Motor Control mouth of drive circuit 1, stepping motor 2 is installed on the transmission mechanism 3, and coaxial interface 5 is installed on the filter main body 4.
Fig. 2 is the structural representation of the utility model main body, and filter main body 4 comprises cavity 6, cover plate 7, coupled structure 8, tuning plug 9.Cover plate 7 usefulness securing members are installed on the cavity 6, and tuning plug 9 one ends insert in the filter main body 4, play airtight quarter-wave coaxial resonator effect jointly.Cavity 6, coupled structure 8 are processed into integrative-structure with the support of part transmission mechanism.Each resonant cavity adopts square structure, is 4 resonant cavitys, and fold arrangement becomes matrix pattern.Radiofrequency signal is by one on the filter main body 4 coaxial mouthful of input, and coupled signal by 8 couplings of different coupled structures, enters each resonant cavity successively in filter main body 4, again by another coaxial mouthful of output.Filter main body 4 becomes a kind of microwave band-pass filter with frequency selection function, can transmit the signal in the resonant frequency range, and curb other unwanted signal.
Fig. 3 is the structural representation of the utility model transmission mechanism, and stepping motor 2 links to each other with guide plate 10 in the transmission mechanism 3, and tuning plug 9 one ends are installed on the guide plate 10, and the other end inserts in the main body 4.The effect of transmission mechanism is to make the angular turn of stepping motor 2 directly be converted into the length variations of tuning plug 9 in filter main body 4 inside, regulates resonance frequency.
The utility model mounting structure is as follows: the input of filter, delivery outlet are coaxial mouthful, are connected with input, the delivery outlet of outer relay part with coaxial cable.There is screw filter main body 4 bottom surfaces, are installed in equipment cabinets inside with screw.
Claims (8)
1. low noise electrically tunable filter, comprise filter main body (4), tuning plug (9), filter main body (4) is made up of cavity (6), cover plate (7), be provided with resonant cavity and coupled structure (8) in the filter main body (4), main body (4) side is provided with the coaxial interface (5) of input, output signal, it is characterized in that: comprise that also stepping motor (2) is connected by the end of transmission mechanism (3) with tuning plug (9) by the stepping motor (2) of drive circuit (1) control.
2. a kind of low noise electrically tunable filter according to claim 1, it is characterized in that: described resonant cavity is 4, is respectively square cavity, becomes matrix pattern to arrange.
3. a kind of low noise electrically tunable filter according to claim 2 is characterized in that: cavity (6) is processed into integrative-structure with coupled structure (8), the rectangular window of coupled structure (8) for offering on cavity (6) madial wall.
4. a kind of low noise electrically tunable filter according to claim 3 is characterized in that: cavity (6) is processed into integrative-structure with coupled structure (8), the rectangular window of coupled structure (8) for offering on the sidewall of cavity (6) interior resonance chamber.
5. a kind of low noise electrically tunable filter according to claim 2 is characterized in that: tuning plug (9) is 4, and an end inserts each resonant cavity respectively, becomes matrix pattern to distribute, and direction is parallel with cover plate (7).
6. a kind of low noise electrically tunable filter according to claim 1 is characterized in that: transmission mechanism (3) comprises guide plate (10), supports (11), wherein supports the integrated processing of cavity (6) in (11) and the main body (4) in the transmission mechanism (3).
7. a kind of low noise electrically tunable filter according to claim 6 is characterized in that: described stepping motor (2) and the vertical installation of guide plate (10), sliding conductor (9) and vertical connection of guide plate (10).
8. a kind of low noise electrically tunable filter according to claim 1 is characterized in that: cover plate (7) is installed on the cavity (6) with securing member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201039751U CN201466181U (en) | 2009-08-03 | 2009-08-03 | Low noise electrically tunable filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201039751U CN201466181U (en) | 2009-08-03 | 2009-08-03 | Low noise electrically tunable filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201466181U true CN201466181U (en) | 2010-05-12 |
Family
ID=42393528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201039751U Expired - Fee Related CN201466181U (en) | 2009-08-03 | 2009-08-03 | Low noise electrically tunable filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201466181U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101894993A (en) * | 2010-07-14 | 2010-11-24 | 深圳市大富科技股份有限公司 | Communication equipment, cavity filter and tuning post thereof |
| CN104393383A (en) * | 2014-12-09 | 2015-03-04 | 中国电子科技集团公司第五十四研究所 | Broad tuning coaxial electrically tunable filter and debugging method thereof |
-
2009
- 2009-08-03 CN CN2009201039751U patent/CN201466181U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101894993A (en) * | 2010-07-14 | 2010-11-24 | 深圳市大富科技股份有限公司 | Communication equipment, cavity filter and tuning post thereof |
| CN104393383A (en) * | 2014-12-09 | 2015-03-04 | 中国电子科技集团公司第五十四研究所 | Broad tuning coaxial electrically tunable filter and debugging method thereof |
| CN104393383B (en) * | 2014-12-09 | 2017-09-29 | 中国电子科技集团公司第五十四研究所 | A kind of coaxial electrically tunable filter of broad tuning and its adjustment method |
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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: 20100512 Termination date: 20180803 |