CN202134640U - Symmetrical T-type band pass filter based on microstrip line structure - Google Patents
Symmetrical T-type band pass filter based on microstrip line structure Download PDFInfo
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- CN202134640U CN202134640U CN201120111144U CN201120111144U CN202134640U CN 202134640 U CN202134640 U CN 202134640U CN 201120111144 U CN201120111144 U CN 201120111144U CN 201120111144 U CN201120111144 U CN 201120111144U CN 202134640 U CN202134640 U CN 202134640U
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- microstrip line
- pass filter
- band pass
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Abstract
The utility model discloses a symmetrical T-type band pass filter based on a microstrip line structure, including a signal input terminal, a signal output terminal, a uniform transmission line, a symmetrical T-type coupling structure and a substrate. A transmission line is uniformly provided at the periphery of the substrate to form a closed loop; the centers at the upper and lower sides of the substrate are respectively provided with a T-type coupling structure; and the left and right sides of the substrate are respectively provided with a signal input terminal and a signal output terminal. In the utility model, the frequency selectivity is various; the structure is simple; the dimension is small; the volume is small; the weight is light; the material is saved; the symmetrical T-type band pass filter based on a microstrip line structure is easy to produce and integrate; and the frequency band scope is from 2 GHz to 3 GHz.
Description
Technical field
The utility model relates to filter, relates in particular to a kind of symmetrical T-shape band pass filter based on microstrip line construction.
Background technology
Filter is the important devices in the communication engineering, and its major function is to suppress unwanted signal.Microwave filter plays a part in radio communication and signal processing and is important, and it has signal that filters frequency of utilization and the function that suppresses interference signal.Along with radio communication to the more development of high band; Be operated in the effect that the microwave filter of a plurality of frequency ranges seems more and more important in communication system; Well behaved filter has extremely low insertion loss, excellent frequency selective characteristic, can make full use of frequency resource, the expanding system capacity, well suppress out of band signal interference, improve communication quality.Band pass filter is that the signal in the frequency band of being confirmed by upper side frequency and lower side frequency is passed through, and the critical function device that the signal beyond the frequency band is suppressed.Transmitting and receiving quality of signals is mainly determined by the characteristic of filter.Generally speaking, microwave filter must possess certain bandwidth and higher filter quality.
In recent years, along with the continuous increase of wireless communication needs, the multifrequency communication equipment progressively enters into people's life.In traditional Multi-Frequency Signaling System, each communication system all has its independently device such as antenna, filter, causes whole system volume and loss all bigger.The method for designing of bilateral band mainly contains filter combination and constitutes the bilateral band, needs to introduce extra match circuit, has not only increased the volume of whole filter, and has caused extra loss; Utilize the Zolotarev Function Synthesis to constitute the bilateral band, but the degree of decay between uncontrollable two passbands of this method; Utilize the parasitic passband of filter, this method is specially adapted to 2.4GHz and the 5.2GHz frequency range of WLAN (Wireless Local Area Network) and uses; Zero limit synthesis, these methods all are based on the numerical optimization algorithm, and its convergence possibly can not get guaranteeing, and when the higher double-passband filter of design performance, its validity will receive serious challenge.
Summary of the invention
The purpose of the utility model is the deficiency that overcomes prior art, and a kind of symmetrical T-shape band pass filter based on microstrip line construction is provided.
Symmetrical T-shape band pass filter based on microstrip line construction comprises signal input part, signal output part, uniform transmission line, symmetrical T-shape coupled structure, matrix; Around matrix, be provided with uniform transmission line and form the closed-loop path; Matrix is arranged with the T-shape coupled structure in the center, both sides up and down, and the left and right sides of matrix is respectively equipped with signal input part and signal output part.
The total length of the microstrip line of described uniform transmission line (3) is 358mm～362mm.The length of the microstrip line closed-loop path of described uniform transmission line (3) is 99mm～101mm.The width of the microstrip line closed-loop path of described uniform transmission line (3) is 80mm～81mm.The width of the microstrip line of described uniform transmission line (3) is 1mm～2mm.The width of the microstrip line of described symmetrical T-shape coupled structure (4) is 1mm～2mm.The symmetrical spacing of described symmetrical T-shape coupled structure (4) is 10mm～12mm.The T-shape total height of described symmetrical T-shape coupled structure (4) is 44mm～45mm.The equivalent resistance of described symmetrical T-shape coupled structure (4) is 50 Ω.Said matrix (5) material is Taconic TLT-6, and its dielectric constant is 2.65, and matrix thickness is 3mm.
The utlity model has the frequency multi-selection, simple in structure, size is little, volume is little, in light weight, economical with materials, to be convenient to make and to be easy to integrated, frequency band range be 2GHz～3GHz.
Description of drawings
Fig. 1 is based on the symmetrical T-shape bandpass filter structures sketch map of microstrip line construction;
Fig. 2 is based on the symmetrical T-shape band pass filter performance curve of microstrip line construction.
Embodiment
As shown in Figure 1; Symmetrical T-shape band pass filter based on microstrip line construction comprises signal input part 1, signal output part 2, uniform transmission line 3, symmetrical T-shape coupled structure 4, matrix 5; Around matrix 5, be provided with uniform transmission line 3 formation closed-loop paths; Matrix is arranged with T-shape coupled structure 4 in the center, both sides about in the of 5, and the left and right sides of matrix 5 is respectively equipped with signal input part 1 and signal output part 2.
The length of the microstrip line closed-loop path of described uniform transmission line 3 is 99mm～101mm.The width of the microstrip line closed-loop path of described uniform transmission line 3 is 80mm～81mm.The width of the microstrip line of described uniform transmission line 3 is 1mm～2mm.The width of the microstrip line of described symmetrical T-shape coupled structure 4 is 1mm～2mm.The symmetrical spacing of described symmetrical T-shape coupled structure 4 is 10mm～12mm.The T-shape total height of described symmetrical T-shape coupled structure 4 is 44mm～45mm.The equivalent resistance of described symmetrical T-shape coupled structure 4 is 50 Ω.Said matrix 5 materials are TaconicTLT-6, and its dielectric constant is 2.65, and matrix thickness is 3mm.
Embodiment
The selection dielectric constant is 2.65 Taconic TLT-6 (Tai Kangli material) making matrix, and thickness is 3.0mm.The length of the microstrip line closed-loop path of uniform transmission line 3 is 100mm, and the width of the microstrip line closed-loop path of uniform transmission line is 80mm, and the width of the microstrip line of uniform transmission line is 1mm.The width of the microstrip line of symmetry T-shape coupled structure is 1mm.The symmetrical spacing of symmetry T-shape coupled structure is 10mm; The T-shape total height of symmetry T-shape coupled structure is 44mm; The equivalent resistance of symmetry T-shape coupled structure 4 is 50 Ω, and the overall dimensions of the symmetrical T-shape band pass filter of microstrip line construction is 100 * 80mm
2, as shown in Figure 2 based on the symmetrical T-shape band pass filter performance curve of microstrip line construction, be symmetrical T-shape band pass filter based on the filter of microstrip line construction, when frequency was 2.038GHz, inserting loss was-0.015dB that bandwidth is 0.147GHz; In frequency is 2.965 o'clock, and inserting loss is-0.01dB that bandwidth is 0.261GHz.
Claims (10)
1. symmetrical T-shape band pass filter based on microstrip line construction; It is characterized in that comprising signal input part (1), signal output part (2), uniform transmission line (3), symmetrical T-shape coupled structure (4), matrix (5); Be provided with uniform transmission line (3) all around at matrix (5) and form the closed-loop path; Matrix (5) center, both sides up and down is arranged with T-shape coupled structure (4), and the left and right sides of matrix (5) is respectively equipped with signal input part (1) and signal output part (2).
2. a kind of symmetrical T-shape band pass filter based on microstrip line construction according to claim 1 is characterized in that the total length of the microstrip line of described uniform transmission line (3) is 358mm～362mm.
3. a kind of symmetrical T-shape band pass filter based on microstrip line construction according to claim 1 is characterized in that the length of the microstrip line closed-loop path of described uniform transmission line (3) is 99mm～101mm.
4. a kind of symmetrical T-shape band pass filter based on microstrip line construction according to claim 1 is characterized in that the width of the microstrip line closed-loop path of described uniform transmission line (3) is 80mm～81mm.
5. a kind of symmetrical T-shape band pass filter based on microstrip line construction according to claim 1 is characterized in that the width of the microstrip line of described uniform transmission line (3) is 1mm～2mm.
6. a kind of symmetrical T-shape band pass filter based on microstrip line construction according to claim 1 is characterized in that the width of the microstrip line of described symmetrical T-shape coupled structure (4) is 1mm～2mm.
7. a kind of symmetrical T-shape band pass filter based on microstrip line construction according to claim 1 is characterized in that the symmetrical spacing of described symmetrical T-shape coupled structure (4) is 10mm～12mm.
8. a kind of symmetrical T-shape band pass filter based on microstrip line construction according to claim 1 is characterized in that the T-shape total height of described symmetrical T-shape coupled structure (4) is 44mm～45mm.
9. a kind of symmetrical T-shape band pass filter based on microstrip line construction according to claim 1 is characterized in that the equivalent resistance of described symmetrical T-shape coupled structure (4) is 50 Ω.
10. a kind of symmetrical T-shape band pass filter based on microstrip line construction according to claim 1 is characterized in that said matrix (5) material is Taconic TLT-6, and its dielectric constant is 2.65, and matrix thickness is 3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120111144U CN202134640U (en) | 2011-04-15 | 2011-04-15 | Symmetrical T-type band pass filter based on microstrip line structure |
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| CN201120111144U CN202134640U (en) | 2011-04-15 | 2011-04-15 | Symmetrical T-type band pass filter based on microstrip line structure |
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| CN202134640U true CN202134640U (en) | 2012-02-01 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103337679A (en) * | 2013-05-30 | 2013-10-02 | 华东交通大学 | Three-passband high-temperature superconductor (HTS) filter based on T-shaped branch loading stepped impedance resonator |
| KR101583015B1 (en) * | 2014-10-10 | 2016-01-06 | 광운대학교 산학협력단 | Dual mode bandpass filter with isolated coupling paths |
| KR101607497B1 (en) | 2014-10-15 | 2016-04-01 | 광운대학교 산학협력단 | Microstrip Bandpass Filters Using Window Hairpin Resonator and T-Feeder Coupling LinesDual mode bandpass filter with isolated coupling paths |
-
2011
- 2011-04-15 CN CN201120111144U patent/CN202134640U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103337679A (en) * | 2013-05-30 | 2013-10-02 | 华东交通大学 | Three-passband high-temperature superconductor (HTS) filter based on T-shaped branch loading stepped impedance resonator |
| CN103337679B (en) * | 2013-05-30 | 2015-10-28 | 华东交通大学 | A kind of three passband high temperature superconduction wave filters based on T-shaped minor matters loading stepped-impedance resonator |
| KR101583015B1 (en) * | 2014-10-10 | 2016-01-06 | 광운대학교 산학협력단 | Dual mode bandpass filter with isolated coupling paths |
| KR101607497B1 (en) | 2014-10-15 | 2016-04-01 | 광운대학교 산학협력단 | Microstrip Bandpass Filters Using Window Hairpin Resonator and T-Feeder Coupling LinesDual mode bandpass filter with isolated coupling paths |
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Legal Events
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120201 Termination date: 20120415 |