CN201204243Y - Dual band-pass spiral filter - Google Patents
Dual band-pass spiral filter Download PDFInfo
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- CN201204243Y CN201204243Y CNU2008200293820U CN200820029382U CN201204243Y CN 201204243 Y CN201204243 Y CN 201204243Y CN U2008200293820 U CNU2008200293820 U CN U2008200293820U CN 200820029382 U CN200820029382 U CN 200820029382U CN 201204243 Y CN201204243 Y CN 201204243Y
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Abstract
This utility model disclosed a dual band-pass spiral filter, from the job at two different frequency bands of many single-frequency spiral filter composition, described in single-frequency filter, respectively, through the spiral cavity divided into a number of vertical parallel resonator, two single-frequency filter coupled helix structure of different polarity and phase into a conjugate match, one of a coupling structure for coupling electric window, and another coupling structure for the magnetic coupling window; single-frequency spiral filter separately by entering the spiral resonator, middle-class spiral resonator, the output of spiral resonators and every two resonator coupling structure between the respective channel, type spiral resonator then input port, output spiral resonator output port access. The utility model is compact and easy circuit design, anti-interference ability, high reliability and large capacity and power for single-input single-output, two pass-band at each other achieve isolation, but also to enable duplex channel to save a port.
Description
Technical field
The utility model relates to a kind of filter, especially relates to a kind of dual band pass screw-filter that is applicable in the field of aerospace technology.
Background technology
In space communication system, need a kind ofly can in the broad frequency band of VHF frequency range, leach two useful channels and also be synthesized, output to the filter of receiver or amplifier simultaneously with a port.This filter not only can be realized the mutual isolation of two passbands, and certain decay is provided in other frequency ranges, thereby has improved antijamming capability.In addition,, thereby make duplex channel save a port, saved one pair of antenna, Receiver And Transmitter, simplified system design, improved reliability for whole system because this kind filter is the single output of single input.But at present, employed duplexer is two ports mostly, and a common cavity must be set, and adopts the mode at the outside matching network of filter to realize two-frequency operation, thereby the design circuit complexity, and volume weight is big and reliability is lower.
The utility model content
Technical problem to be solved in the utility model is at above-mentioned deficiency of the prior art, a kind of dual band pass screw-filter is provided, its compact conformation, design circuit is simple, antijamming capability is strong, reliability is high and be the single output of single input, when realizing that two passbands are isolated mutually, also make duplex channel save a port.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of dual band pass screw-filter, it is characterized in that: form by two multistage single-frequency screw-filters that are operated in different frequency, described single-frequency screw-filter is separated into a plurality of vertically resonant cavitys arranged side by side by cavity respectively, the coupled structure polarity difference and the phase place of the two of described two single-frequency screw-filters become conjugate impedance match, one of them coupled structure is the electric coupling window, and another coupled structure is the magnetic coupling window; Described single-frequency screw-filter forms passage separately by the middle coupling window between input helical resonator, intergrade helical resonator, output helical resonator and per two resonators respectively, described input helical resonator connects input port, and described output helical resonator connects output port.
Described input helical resonator, intergrade helical resonator and output helical resonator are formed by medium skeleton and the blister copper lead helix that is wrapped in its outside.
Described medium skeleton is the PTFE medium skeleton.
Described electric coupling window is different with the size of magnetic coupling window.
Described input helical resonator connects input port by the input coupling feed, and described output helical resonator connects output port by the output coupling feed, and described input port and output port all are connected to SMA type joint.
The feed placement of described two single-frequency screw-filters input coupling feed is different with shape, and the feed placement of described two single-frequency screw-filters output coupling feed is different with shape.
Described input coupling feed and output coupling feed are passed the wall-through hole that is opened on the cavity and are joined with input port and output port respectively.
Described two single-frequency screw-filters are three rank filters.
Described electric coupling window is opened in the cavity top that is positioned between per two described resonant cavitys, and described magnetic coupling window is opened in the cavity bottom that is positioned between per two described resonant cavitys.
The utility model compared with prior art has the following advantages, and 1, compact conformation, processing and fabricating is convenient, and power capacity is big; 2, the simple and reliable property of circuit design height with two polarity differences, single-frequency screw-filter that coupled structure is different, connects and forms certain conjugate impedance match by input, the output feeder with appropriate phase, realizes that finally the dual band pass screw-filter is integrated; 3, be the single output of single input, when realizing that two passbands are isolated mutually, also make duplex channel save a port, for whole system has been saved one pair of antenna, Receiver And Transmitter; 4, can not only in VHF frequency range broad frequency band, leach two useful channels and be synthesized and output to receiver or amplifier, and in other frequency ranges, provide certain decay, improve antijamming capability with a port; 5, saved volume weight, adopt inner couplings parameter conjugate impedance match technology, make two passages can realize the double frequency screw-filter of the single output of single input, adopt the outside matching network realization of filter two-frequency operation to compare with routine, volume weight reduces greatly, and does not need to use common cavity; 6, applied widely, can not only be widely used in the spacecraft return capsule payload, can be complementary with the manned spaceship antenna, but also can be widely used in other satellite payload and the Ground Communication System; 7, can be simply and easily with other screw-filters carry out integrated, final duplexer or the multiplexer of forming with transmit-receive sharing function.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Description of drawings
Fig. 1 is a circuit theory schematic diagram of the present utility model.
Fig. 2 is a structural representation of the present utility model.
Fig. 3 is the A-A cutaway view of Fig. 2.
Fig. 4 is the B-B cutaway view of Fig. 2.
Description of reference numerals:
1-cavity; 2-single-frequency screw-filter one; 3-single-frequency screw-filter two;
4-SMA type joint; 5-PTFE medium bone, 6-blister copper lead helix;
Frame;
7-input helical resonator, 8-intergrade helical resonator, 9-output helical resonator two;
Two; Two;
10-output helical resonator, 11-intergrade helical resonator, 12-input helical resonator
One; One; One;
13-input coupling feed two; 14-output coupling feed two; 15-input coupling feed one;
16-output coupling feed one; 17-electric coupling window one; 18-electric coupling window two;
19-magnetic coupling window one; 20-magnetic coupling window two; 21-wall-through hole;
22-input port; 23-output port.
Embodiment
As shown in Figure 1, the utility model is made up of two multistage single-frequency screw-filters that are operated in different frequency, and described single-frequency screw-filter is separated into a plurality of vertically resonant cavitys arranged side by side by cavity 1 respectively, is provided with a resonator in each resonant cavity; And the coupled structure polarity of two single-frequency screw-filters is different and the phase place of the two becomes conjugate impedance match, and one of them coupled structure is the electric coupling window, and another coupled structure is the magnetic coupling window.In addition, described single-frequency screw-filter forms passage separately by the middle coupling window between input helical resonator, intergrade helical resonator, output helical resonator and per two resonators respectively, and the input helical resonator connects input port 22, and the output helical resonator connects output port 23.That is to say that the utility model adopts inner couplings parameter conjugate impedance match technology, make two passages can realize the double frequency screw-filter of the single output of single input.
In conjunction with Fig. 2, in this specific embodiment, form by single-frequency screw-filter 1 and 23 two single-frequency screw-filters of single-frequency screw-filter, and above-mentioned two single-frequency screw-filters mate with the output coupling feed by the input coupling feed and link to each other, and the input coupling feed connects input port 22, and the output coupling feed connects output port 23.The feed placement of the input coupling feed of described single-frequency screw-filter 1 and single-frequency screw-filter 23 is different with shape, the feed placement of the output coupling feed of described single-frequency screw-filter 1 and single-frequency screw-filter 23 is different with shape, and is thin copper conductor.Specifically: single-frequency screw-filter 1 connects input port 22 and output port 23 respectively by input coupling feed 1 and output coupling feed 1, and single-frequency screw-filter 23 connects input port 22 and output port 23 respectively by input coupling feed 2 13 and output coupling feed 2 14, realized the single output of single input like this, when realizing that two passbands are isolated mutually, also make duplex channel save a port.Thereby the utility model is integrated in the filter by two input coupling feed and two output coupling feed, and does not need common cavity, and its structure and circuit design and general spiral duplexer or the dual band pass filter of being made up of circulator are different.And single-frequency screw-filter 1 is different with the operating frequency of the resonator of single-frequency screw-filter 23, and the size dimension difference of the coupled structure of the two is that described electric coupling window is different with the size of magnetic coupling window.Described input port 22 and output port 23 all are connected to SMA type joint 4.
In addition, described single-frequency screw-filter 1 and single-frequency screw-filter 23 are three rank filters, and it includes three vertical resonant cavitys arranged side by side, is provided with a resonator in each resonant cavity, and each resonator coil bottom ground connection.Wherein, single-frequency screw-filter 1 is made up of input helical resonator 1, intergrade helical resonator 1 and output helical resonator 1, and the coupled structure of single-frequency screw-filter 1 is the magnetic coupling structure.As shown in Figure 4, middle coupling window between input helical resonator 1 and the intergrade helical resonator 1 is a magnetic coupling window 1, and the middle coupling window between intergrade helical resonator 1 and the output helical resonator 1 is a magnetic coupling window 2 20.And single-frequency screw-filter 23 is made up of input helical resonator 1, intergrade helical resonator 1 and output helical resonator 1, and the coupled structure of single-frequency screw-filter 23 is the electric coupling structure.As shown in Figure 3, the middle coupling window between input helical resonator 1 and the intergrade helical resonator 1 is an electric coupling window 1, and is electric coupling window 2 18 between intergrade helical resonator 1 and the output helical resonator 1.
That is to say, adopt the magnetic field coupling between the resonator of single-frequency screw-filter 1, and adopt field coupled between the resonator of single-frequency screw-filter 23, and make that two single-frequency screw-filter phase places can conjugate impedance match when integrated.Two described electric coupling windows are opened in cavity 1 top that is positioned between per two described resonant cavitys, and two described magnetic coupling windows are opened in cavity 1 bottom that is positioned between per two described resonant cavitys.
And three resonators of single-frequency screw-filter 1 and single-frequency screw-filter 23 are formed by medium skeleton and the blister copper lead helix 6 that is wrapped in its outside, and described medium skeleton is a PTFE medium skeleton 5, and the resonator of being formed is installed on the internal backplane of cavity 1.The structure of above-mentioned six described resonant cavitys of resonator mainly is according to power capacity, inserts the size dimension that loss requires to design and select each cavity, its concrete choice criteria is: if power requirement is low, then the size of the cavity length of side can be less, if and the power requirement height, then the size of the cavity length of side is bigger; The welding position of each resonator coil of cavity choice of location of while resonant cavity of living in; And select the height dimension of resonator separately according to the operating frequency of each single-frequency screw-filter, generally be about 0.05 operation wavelength; In the present embodiment, the diameter of used blister copper lead helix 6 is 2mm, and pitch is 4mm.
In addition, in the present embodiment, single-frequency screw-filter 1 is positioned at the left side of single-frequency screw-filter 23, and input port 22 and output port 23 all are opened in the right side of single-frequency screw-filter 23.Thereby, the input coupling feed 2 13 of joining with the input helical resonator 1 of single-frequency screw-filter 23 directly connects input port 22, and directly connects output port 23 with output coupling feed 2 14 that the output helical resonator 1 of single-frequency screw-filter 23 joins.And connect input port 22 by the wall-through hole 21 that is opened on the cavity 1 with input coupling feed 1 that the input helical resonator 1 of single-frequency screw-filter 1 joins, the output coupling feed 1 of joining with the output helical resonator 1 of single-frequency screw-filter 1 connects output port 23 by the wall-through hole 21 that is opened on the cavity 1, because input coupling feed 1 and output coupling feed 1 are passed through wall-through hole 21 in narrow space, thereby noiseless coupling.
In the actual application, the F01 passage of single-frequency screw-filter 1 is made of input coupling feed 15, input helical resonator 12, magnetic coupling window 1, intergrade helical resonator 11, magnetic coupling window 2 20, output helical resonator 10 and output coupling feed 16; The F02 passage of single-frequency screw-filter 23 is made of input coupling feed 13, input helical resonator 7, electric coupling window 1, intergrade helical resonator 8, electric coupling window 2 18, output helical resonator 9 and output coupling feed 14.That is to say that the utility model is operated in double frequency-band, have two passages.To sum up, two single-frequency screw-filters form passage separately by three resonators and inner electric coupling window or magnetic coupling window thereof respectively, finish coupling with external circuit by importing coupling feed or output coupling feed separately again.In the processing and making process, main also the need is optimized the input coupling feed of two single-frequency screw-filters and the size parameter of location parameter, electric coupling structure and the magnetic coupling structure of output coupling feed, makes two interchannels not have mutual interference; And respectively import coupling feed or output coupling feed is to be welded on respectively on the input resonator and output resonator separately, the location parameter of its welding and length parameter design mainly are according to the external circuit quality factor Q value and the installation site of formation bilateral band screw-filter response function, have also considered mutual parasitic effects in addition.In the practice, for making each passage of duplexer have high transmit-receive sharing function of isolating, to reduce to the energy that is coupled to this passage by input coupling feed or output coupling feed between each passage minimum: the one, correctly select the position of wall-through hole 21, avoid in the strength of electric field; The 2nd, make the input coupling feed of other passages as far as possible and export the resonator of coupling feed away from this passage.In this specific embodiment, the operating frequency of the F01 passage of single-frequency screw-filter 1 is 240MHz, and bandwidth is 3MHz, and the center Insertion Loss is less than 0.6dB; And the operating frequency of the F02 passage of single-frequency screw-filter 23 is 280MHz, and bandwidth is 11MHz, and the center Insertion Loss is less than 0.4dB.Voltage standing wave ratio is all below 1.2 in the band of two single-frequency screw-filters, and F01 passage and F02 interchannel are isolated mutually greater than 30dB.
The above; it only is preferred embodiment of the present utility model; be not that the utility model is imposed any restrictions; everyly any simple modification that above embodiment did, change and equivalent structure are changed, all still belong in the protection range of technical solutions of the utility model according to the utility model technical spirit.
Claims (9)
1. dual band pass screw-filter, it is characterized in that: form by two multistage single-frequency screw-filters that are operated in different frequency, each described single-frequency screw-filter is separated into a plurality of vertically resonant cavitys arranged side by side by cavity (1) respectively, the coupled structure polarity difference and the phase place of the two of described two single-frequency screw-filters become conjugate impedance match, one of them coupled structure is the electric coupling window, and another coupled structure is the magnetic coupling window; Described single-frequency screw-filter forms passage separately by the middle coupling window between input helical resonator, intergrade helical resonator, output helical resonator and per two resonators respectively, described input helical resonator connects input port (22), and described output helical resonator connects output port (23).
2. according to the described dual band pass screw-filter of claim 1, it is characterized in that: described input helical resonator, intergrade helical resonator and output helical resonator are formed by medium skeleton and the blister copper lead helix (6) that is wrapped in its outside.
3. according to the described dual band pass screw-filter of claim 2, it is characterized in that: described medium skeleton is PTFE medium skeleton (5).
4. according to claim 1,2 or 3 described dual band pass screw-filters, it is characterized in that: described electric coupling window is different with the size of magnetic coupling window.
5. according to claim 2 or 3 described dual band pass screw-filters, it is characterized in that: described input helical resonator connects input port (22) by the input coupling feed, described output helical resonator connects output port (23) by the output coupling feed, and described input port (22) and output port (23) all are connected to SMA type joint (4).
6. according to the described dual band pass screw-filter of claim 5, it is characterized in that: the feed placement of described two single-frequency screw-filters input coupling feed is different with shape, and the feed placement of described two single-frequency screw-filters output coupling feed is different with shape.
7. according to the described dual band pass screw-filter of claim 5, it is characterized in that: described input coupling feed and output coupling feed are passed the wall-through hole (21) that is opened on the cavity (1) and are joined with input port (22) and output port (23) respectively.
8. according to claim 1,2 or 3 described dual band pass screw-filters, it is characterized in that: described two single-frequency screw-filters are three rank filters.
9. according to claim 1,2 or 3 described dual band pass screw-filters, it is characterized in that: described electric coupling window is opened in cavity (1) top that is positioned between per two described resonant cavitys, and described magnetic coupling window is opened in cavity (1) bottom that is positioned between per two described resonant cavitys.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200293820U CN201204243Y (en) | 2008-06-18 | 2008-06-18 | Dual band-pass spiral filter |
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| Application Number | Priority Date | Filing Date | Title |
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| CNU2008200293820U CN201204243Y (en) | 2008-06-18 | 2008-06-18 | Dual band-pass spiral filter |
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| CN201204243Y true CN201204243Y (en) | 2009-03-04 |
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| CNU2008200293820U Expired - Lifetime CN201204243Y (en) | 2008-06-18 | 2008-06-18 | Dual band-pass spiral filter |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101964434A (en) * | 2009-07-23 | 2011-02-02 | 大富（深圳）科技有限公司 | Input/output structure of cavity filter |
| CN102176526A (en) * | 2010-12-31 | 2011-09-07 | 深圳市大富科技股份有限公司 | Cavity filter and manufacturing method thereof |
| CN102324601A (en) * | 2011-08-29 | 2012-01-18 | 摩比天线技术（深圳）有限公司 | Tunable filter |
| CN103457008A (en) * | 2013-08-31 | 2013-12-18 | 西安电子科技大学 | Filter with back cavity resonators |
| CN104934669A (en) * | 2015-06-15 | 2015-09-23 | 华南理工大学 | Double-frequency helical cavity filter with controllable bandwidth |
| CN106025466A (en) * | 2016-06-08 | 2016-10-12 | 上海华为技术有限公司 | Filter and duplexer |
| CN107681237A (en) * | 2017-10-20 | 2018-02-09 | 成都美数科技有限公司 | Adjustable type composite filter cavity |
| CN108183292A (en) * | 2017-11-30 | 2018-06-19 | 成都华为技术有限公司 | Dielectric filter and communication equipment |
| CN108512517A (en) * | 2018-06-15 | 2018-09-07 | 成都九洲迪飞科技有限责任公司 | High-power sugarcoated haws string data bandpass filter |
| CN109687073A (en) * | 2019-03-01 | 2019-04-26 | 江苏德是和通信科技有限公司 | A kind of star-like duplexer of DTV adjacent channel |
-
2008
- 2008-06-18 CN CNU2008200293820U patent/CN201204243Y/en not_active Expired - Lifetime
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101964434A (en) * | 2009-07-23 | 2011-02-02 | 大富（深圳）科技有限公司 | Input/output structure of cavity filter |
| CN102176526A (en) * | 2010-12-31 | 2011-09-07 | 深圳市大富科技股份有限公司 | Cavity filter and manufacturing method thereof |
| CN102176526B (en) * | 2010-12-31 | 2013-08-14 | 深圳市大富科技股份有限公司 | Cavity filter and manufacturing method thereof |
| CN102324601A (en) * | 2011-08-29 | 2012-01-18 | 摩比天线技术（深圳）有限公司 | Tunable filter |
| CN103457008B (en) * | 2013-08-31 | 2016-03-02 | 西安电子科技大学 | A kind of filter with back of the body chamber resonator |
| CN103457008A (en) * | 2013-08-31 | 2013-12-18 | 西安电子科技大学 | Filter with back cavity resonators |
| CN104934669A (en) * | 2015-06-15 | 2015-09-23 | 华南理工大学 | Double-frequency helical cavity filter with controllable bandwidth |
| CN104934669B (en) * | 2015-06-15 | 2018-02-27 | 华南理工大学 | A kind of controllable double frequency spiral cavity filter of bandwidth |
| CN106025466A (en) * | 2016-06-08 | 2016-10-12 | 上海华为技术有限公司 | Filter and duplexer |
| CN107681237A (en) * | 2017-10-20 | 2018-02-09 | 成都美数科技有限公司 | Adjustable type composite filter cavity |
| CN108183292A (en) * | 2017-11-30 | 2018-06-19 | 成都华为技术有限公司 | Dielectric filter and communication equipment |
| CN108512517A (en) * | 2018-06-15 | 2018-09-07 | 成都九洲迪飞科技有限责任公司 | High-power sugarcoated haws string data bandpass filter |
| CN109687073A (en) * | 2019-03-01 | 2019-04-26 | 江苏德是和通信科技有限公司 | A kind of star-like duplexer of DTV adjacent channel |
| CN109687073B (en) * | 2019-03-01 | 2024-04-12 | 江苏德是和通信科技有限公司 | Digital television adjacent channel star-shaped duplexer |
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Granted publication date: 20090304 |