CN2653708Y - Grouped hair pin structure microstrip filter for microwave communication - Google Patents
Grouped hair pin structure microstrip filter for microwave communication Download PDFInfo
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- CN2653708Y CN2653708Y CN 03258499 CN03258499U CN2653708Y CN 2653708 Y CN2653708 Y CN 2653708Y CN 03258499 CN03258499 CN 03258499 CN 03258499 U CN03258499 U CN 03258499U CN 2653708 Y CN2653708 Y CN 2653708Y
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Abstract
The utility model discloses a grouping type hairpin structure micro strip wave filter used in microwave communication. The micro strip wave filter is characterized in consists of an input micro strip and an output micro strip and first syntonizer and a last syntonizer accepting direct activation, as well as a hairpin type syntonizer group, which has reversed directions in the groups but the same amounts and directions in the groups as well as an effective length of a half wave length; wherein, the input micro strip and output micro strip of the wave filter are directly connected with the first syntonizer and the last syntonizer. The utility model has the advantages that the wave filter has better frequency selecting performance than the relatively traditional hairpin type wave filter; the directions of the syntonizers within the same group are the same one and the coupling performance is relatively low; the directions of the syntonizers with the adjacent groups are different with relatively high coupling performance. Therefore, the amount of the syntonizers within the same group can be flexibly adjusted to adapt to designing the wave filters with different widths of pass bands. The utility model not only can be used in the traditional plane type common metallic micro strip wave filter, more suitable for producing a high temperature super conductance wave filter with high quality of factor.
Description
(1) technical field:
The utility model relates to a kind of band pass filter that is applicable to that microwave communication is used, particularly a kind of microstrip filter that is applicable to the group hairpin structure that microwave communication is used.
(2) background technology:
For a long time, filter plays an important role in the processing of electronic signal always, and it has signal that filters frequency of utilization and the function that suppresses interference signal.Along with the fast development of microwave wireless communication, more and more higher requirement has been proposed for the electric property of filter.The high temperature superconduction wave filter technology that developed recently gets up has well adapted to this demand, because high-temperature superconducting thin film has very high quality factor (Q value), so microstrip type filter that adopts high-temperature superconducting thin film to make, have extremely low insertion loss and excellent frequency selective characteristic (upper passband edge steepness), make in its reception and emission system that is specially adapted to mobile communication base station.Mobile communication base station uses after the high temperature superconduction wave filter, can increase the area coverage of base station, the interference of reduction noise, improves speech quality; And can reduce the transmitting power of mobile phone, and significantly reduce the influence of electromagenetic wave radiation to human brain, reach requirements of green environmental protection.
The microwave filter that uses high-temperature superconducting thin film to make mostly is the planar structure of microstrip type, for half-wave resonator formula coupling filter, its circuit basic comprising is generally: the little band of the input of signal, export the micro-strip resonantor of little band, a plurality of generation resonance coupling, the effective length of resonator is the half-wavelength of centre frequency, and multipole resonator is to the electromagnetic excitation of corresponding frequencies and coupled transfer effect and finally reach filtration treatment to microwave signal.The project organization scheme that multiple maturation is arranged at present is to adapt to different specification requirements:
Accompanying drawing 2 is the band pass filter of typical hair clip formula half-wave resonator (hairpin-resonator), please refer to E.G.Cristal and S.Frankel, " Hairpin-line andHybrid Hairpin-Line/Half-Wave Parallel-Coupled-Line Filters ", IEEE Trams.MTT, vol.MTT-20, pp.719-728, (November 1972), this structure can be similar to the distortion of regarding structure shown in the accompanying drawing 1 as, and the effective length of its each resonator still is a half-wavelength.In this project organization, resonator direction in the filter is upper and lower replacing by turns, this structure makes very strong coupling effect between resonator, be fit to make the filter in broadband, if be used to make narrow band filter, then filter can need sizable space;
Accompanying drawing 3 is the filter construction of another kind of hair clip formula resonator, please see for details in M.Sagawa, K.Takahashi, and M.Makimoto, " Miniaturized Hairpin ResonatorFilters and their Application to Receiver Front-End MIC ' s ", IEEETrams.MTTvol.37, pp.1991-1997 (December 1998), in this kind project organization, the front end of resonator opening is shortened, and produce very strong capacity effect, resonator demonstrates half block shape (semi-lumped) character, promptly capacitive effects is showed in upper end (openend), and the inductive effect is showed in the lower end.The resonator direction of this filter construction all is in the same way, in order to shorten whole resonator length, the capacitive part of resonator can be increased and inductive part is dwindled, but its quality factor (Q value) will reduce along with such adjustment;
Accompanying drawing 4 is the filter of a kind of Hair pin comb type (Hairpin-Comb) half-wave resonator, the direction of this kind resonator that filter comprises is all identical, the effective total length of each resonator is a half-wavelength, the filter of this kind structure is fit to make arrowband (narrow-band) filter, and promptly the filter of relative bandwidth (filter passband width/filter center frequency) less than 1% please refer to George L.Matthaei, US Patent Number 5,888,942 (Mar.30,1999).
(3) summary of the invention:
The purpose of this utility model is to design a kind of microwave communication group hairpin structure microstrip filter, it is a kind of microwave band-pass filter, it is little that it has a volume, high passband selectivity, high noise suppresses the characteristics of ability, suitable use has the high-temperature superconducting thin film of high-quality-factor to be made, be particularly suitable for using high-temperature superconducting thin film make that mobile communication base station receives and emission system in filter.
The technical solution of the utility model: a kind of microwave communication group hairpin structure microstrip filter, it is characterized in that it be by the little band of input and output with accept direct-drive first with last resonator and many prescriptions in opposite, each group number, direction is identical and effective length is constituted by the hair clip formula resonator cohort of half-wavelength, the input of filter, output are little band and directly are connected with last resonator with first resonator in the filter.
Above-mentioned said many prescriptions in opposite, each group number, direction is identical and effective length is that the shape of each resonator in the hair clip formula resonator cohort of half-wavelength can identically also can have difference.
Above-mentioned said many prescriptions in opposite, each group number, direction is identical and effective length is that distance between each resonator in the hair clip formula resonator cohort of half-wavelength can identically also can have difference.
Above-mentioned said many prescriptions in opposite, each group number, direction is identical and effective length is that the spacing that the hair clip formula of half-wavelength is organized between the resonator cohort more can identically also can have difference.
The number of poles of resonator should be 2 utmost points at least in each resonator cohort of above-mentioned said filter, and direction is identical.
Resonator cohort in the above-mentioned said filter should be not less than 1 group, and the direction of the resonator of adjacent cohort must be opposite.
The direction of first that the input of above-mentioned said and filter, the little band of output directly are connected and last resonator can be equidirectional also can be in the other direction, but the resonator cohort that must be adjacent is reverse.
The turning point of the hair clip formula resonator in the above-mentioned said filter can be designed to different geometries according to need, can be rectangular-shaped, stepped, trapezoidal shape, semicircle shape etc.
Above-mentioned said filter available metal film is made, and is more suitable for using the high-temperature superconducting thin film with high-quality-factor to make.
Superiority of the present utility model is: 1, microwave communication has better frequency selectivity with the filter of the traditional typical hair clip formula resonator of group hairpin structure microstrip filter, promptly has higher passband edge steepness, improve the sensitivity of filter, 2, the resonator direction in the same cohort of group hairpin structure microstrip filter is identical, a little less than the coupling, the resonator direction of adjacent cohort is opposite, it is stronger to be coupled, therefore can be by adjusting the number of resonator in the same cohort flexibly, to adapt to the filter that designs different passband widths; 3, the utility model not only can be used for traditional plane common metal microstrip filter, more is applicable to make the high temperature superconduction wave filter with high-quality-factor, is applied in the various microwave communication system.
(4) description of drawings:
Accompanying drawing 2 is the filter construction schematic diagram of existing typical hair clip formula resonator, and wherein the direction of hair clip formula resonator alternately presents rightabout.
Accompanying drawing 3 is the filter construction schematic diagram of existing half block shape (semi-lumped) hair clip formula resonator.
Accompanying drawing 4 is existing hair clip formula comb filter structural representation, and the direction of its hair clip formula resonator all in the same way.
Accompanying drawing 5 is the structural representation of the related a kind of microwave communication of the utility model with group hairpin structure microstrip filter.
Accompanying drawing 6-1 is the frequency response chart of the related a kind of microwave communication of the utility model with group hairpin structure microstrip filter (as shown in Figure 5), and the number of poles of filter is designed to 14 utmost points, and every cohort is designed to 2 resonators;
Accompanying drawing 6-2 is the related a kind of microwave communication of the utility model with the low side frequency response comparison diagram of group hairpin structure 14 atomic band filters (as shown in Figure 5) with the filter of traditional 14 utmost point hair pin type structures (as shown in Figure 2);
Accompanying drawing 6-3 is the related a kind of microwave communication of the utility model with the high-end frequency response comparison diagram of group hairpin structure 14 atomic band filters (as shown in Figure 5) with the filter of traditional 14 utmost point hair pin type structures (as shown in Figure 2).
Wherein: 10 is the parallel coupled mode filter of resonator, 11 is coupled resonators, 12 import little band for signal, 13 are with 20 to be the filter of hair clip formula resonator for signal output is little, 21 is hair clip formula resonator, and 22 import little band for signal, and 23 export little band for signal, 24 is the openend of hair clip formula resonator, and 25 is the turning point of hair clip formula resonator; 30 is the filter of half block shape (semi-lumped) formula resonator, 31 is half block shape resonator, and 32 import little band for signal, and 33 export little band for signal, 34 is the openend (capacity effect end) of half block shape resonator, and 35 is the turning point (inductive effect end) of half block shape resonator; 40 is hair clip formula comb filter, and 41 is hair clip formula resonator, and 42 import little band for signal, and 43 export little band for signal, and 44 is the openend of hair clip formula resonator, and 45 is the turning point of hair clip formula resonator; 50 is group hairpin structure microstrip filter, 51 is a resonator cohort, 51a, 51b is two resonators in the resonator cohort, 52 import little band for signal, 53 export little band for signal, 54 is the openend of hair clip formula resonator, 55 is the turning point of hair clip formula resonator, 56 is first resonator, 57 is last resonator, and 58 is another resonator cohort adjacent with resonator cohort 51,58a, 58b is two resonators in the resonator cohort, L1 is the gap between resonator in the same resonator cohort, and L2 is the gap between adjacent two resonator cohorts; 60 for adopting the frequency response curve (S21) of group hairpin structure microstrip filter, 61 for adopting the frequency response curve (S11) of group hairpin structure microstrip filter, 62 for adopting the low side frequency response curve of group hairpin structure microstrip filter, 63 low side frequency response curves that adopt traditional hair clip formula filter construction, 64 for adopting the high-end frequency response curve of group hairpin structure microstrip filter, 65 high-end frequency response curves that adopt traditional hair clip formula filter construction.
(5) embodiment:
Embodiment: a kind of microwave communication group hairpin structure microstrip filter, it is characterized in that it be by input little with 52, output little with 53 with first resonator 56 of accepting direct-drive and last resonator 57 and many prescriptions in opposite, each group number, direction is identical and effective length is constituted by the hair clip formula resonator cohort 51 of half-wavelength, the input 52 of filter, output 53 are little band and directly are connected with last resonator 57 with first resonator 56 in the filter.
Above-mentioned said many prescriptions in opposite, each group number, direction is identical and effective length is that the shape of each resonator 51a, 51b in the hair clip formula resonator cohort 51 of half-wavelength can identically also can have difference.
Above-mentioned said many prescriptions in opposite, each group number, direction is identical and effective length is that distance L 1 between each resonator 51a, 51b in the hair clip formula resonator cohort 51 of half-wavelength can identically also can have difference.
Above-mentioned said many prescriptions in opposite, each group number, direction is identical and effective length is that the spacing that the hair clip formula of half-wavelength is organized between the adjacent cohort with other of spacing L2 of resonator cohort 51,58 more can identically also can have different.
The number of poles of resonator 51a, 51b should be 2 utmost points at least in each resonator cohort 51,58 of above-mentioned said filter, and direction is identical.
Above-mentioned said input with filter little with 52, the little direction with 53 first resonators 56 that directly are connected and last resonator 57 of output can be equidirectional also can be in the other direction, but the resonator cohort that must be adjacent is reverse.
The turning point 55 of the hair clip formula resonator in the above-mentioned said filter can be designed to different geometries according to need, can be rectangular-shaped, stepped, trapezoidal shape, semicircle shape etc.
Above-mentioned said filter available metal film is made, and is more suitable for using the high-temperature superconducting thin film with high-quality-factor to make.
Claims (9)
1, a kind of microwave communication group hairpin structure microstrip filter, it is characterized in that it be by the little band of input and output with accept direct-drive first with last resonator and many prescriptions in opposite, each group number, direction is identical and effective length is constituted by the hair clip formula resonator cohort of half-wavelength, the input of filter, output are little band and directly are connected with last resonator with first resonator in the filter.
2, according to the said a kind of microwave communication of claim 1 with group hairpin structure microstrip filter, it is characterized in that said many prescriptions in opposite, each group number, direction is identical and effective length is that the shape of each resonator in the hair clip formula resonator cohort of half-wavelength can identically also can have difference.
3, according to the said a kind of microwave communication of claim 1 with group hairpin structure microstrip filter, it is characterized in that said many prescriptions in opposite, each group number, direction is identical and effective length is that distance between each resonator in the hair clip formula resonator cohort of half-wavelength can identically also can have difference.
4, according to the said a kind of microwave communication of claim 1 with group hairpin structure microstrip filter, it is characterized in that said many prescriptions in opposite, each group number, direction is identical and effective length is that the spacing that the hair clip formula of half-wavelength is organized between the resonator cohort more can identically also can have difference.
5, according to the said a kind of microwave communication of claim 1 with group hairpin structure microstrip filter, it is characterized in that the number of poles of resonator in each resonator cohort of said filter should be 2 utmost points at least, and direction is identical.
6, according to the said a kind of microwave communication of claim 1 group hairpin structure microstrip filter, it is characterized in that the resonator cohort in the said filter should be not less than 1 group, and the direction of the resonator of adjacent cohort must be opposite.
7, according to the said a kind of microwave communication of claim 1 group hairpin structure microstrip filter, it is characterized in that the direction of the input of said and filter, the little band of output directly is connected first and last resonator can be equidirectional also can be in the other direction, but the resonator cohort that must be adjacent is reverse.
8, according to the said a kind of microwave communication of claim 1 group hairpin structure microstrip filter, the turning point that it is characterized in that the hair clip formula resonator in the said filter can be designed to different geometries according to need, can be rectangular-shaped, stepped, trapezoidal shape, semicircle shape etc.
9, according to the said a kind of microwave communication of claim 1 group hairpin structure microstrip filter, it is characterized in that said filter available metal film making, be more suitable for using high-temperature superconducting thin film to make with high-quality-factor.
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| CN 03258499 CN2653708Y (en) | 2003-09-24 | 2003-09-24 | Grouped hair pin structure microstrip filter for microwave communication |
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| CN 03258499 CN2653708Y (en) | 2003-09-24 | 2003-09-24 | Grouped hair pin structure microstrip filter for microwave communication |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107732382A (en) * | 2017-09-07 | 2018-02-23 | 南京理工大学 | A kind of Ku band filters |
| CN109088134A (en) * | 2018-07-04 | 2018-12-25 | 深圳三星通信技术研究有限公司 | A kind of microstrip bandpass filter |
| CN110994113A (en) * | 2019-12-27 | 2020-04-10 | 清华大学 | Microwave resonator |
| CN114824699A (en) * | 2022-04-22 | 2022-07-29 | 成都威频科技有限公司 | Capacitor and inductor loading hybrid resonant thin-film filter |
-
2003
- 2003-09-24 CN CN 03258499 patent/CN2653708Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107732382A (en) * | 2017-09-07 | 2018-02-23 | 南京理工大学 | A kind of Ku band filters |
| CN109088134A (en) * | 2018-07-04 | 2018-12-25 | 深圳三星通信技术研究有限公司 | A kind of microstrip bandpass filter |
| CN110994113A (en) * | 2019-12-27 | 2020-04-10 | 清华大学 | Microwave resonator |
| CN114824699A (en) * | 2022-04-22 | 2022-07-29 | 成都威频科技有限公司 | Capacitor and inductor loading hybrid resonant thin-film filter |
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| CF01 | Termination of patent right due to non-payment of annual fee |