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 PDF

Info

Publication number
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
Authority
CN
China
Prior art keywords
symmetrical
microstrip line
pass filter
band pass
filter based
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
Application number
CN201120111144U
Other languages
Chinese (zh)
Inventor
赵春喜
李九生
宋美静
许瑞旭
张秋实
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Jiliang University
Original Assignee
China Jiliang University
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by China Jiliang University filed Critical China Jiliang University
Priority to CN201120111144U priority Critical patent/CN202134640U/en
Application granted granted Critical
Publication of CN202134640U publication Critical patent/CN202134640U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Landscapes

  • Control Of Motors That Do Not Use Commutators (AREA)

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

A kind of symmetrical T-shape band pass filter based on microstrip line construction
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.
CN201120111144U 2011-04-15 2011-04-15 Symmetrical T-type band pass filter based on microstrip line structure Expired - Fee Related CN202134640U (en)

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

Applications Claiming Priority (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

Publications (1)

Publication Number Publication Date
CN202134640U true CN202134640U (en) 2012-02-01

Family

ID=45523402

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201120111144U Expired - Fee Related CN202134640U (en) 2011-04-15 2011-04-15 Symmetrical T-type band pass filter based on microstrip line structure

Country Status (1)

Country Link
CN (1) CN202134640U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
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

Cited By (4)

* Cited by examiner, † Cited by third party
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

Similar Documents

Publication Publication Date Title
CN103762404B (en) Double-frequency-band filter
CN102509821A (en) Dual-mode bi-pass filter based on capacitance loading square resonant rings
CN108539336B (en) HMSIW dual-mode dual-band filter with independently controllable bandwidth
CN202134640U (en) Symmetrical T-type band pass filter based on microstrip line structure
CN103187600A (en) Dual-mode three-way wide-band filter based on multi-branch loaded square resonance ring
CN202084619U (en) Band-pass filter based on microstrip line structure
CN203644915U (en) Double-trap frequency-band UWB (ultra wide band) band-pass filter based on cross resonator
CN105024119A (en) Dual-mode micro-strip band-pass filter with stepped impedance resonator center being loaded with folding-type stepped impedance stub
CN104241797A (en) Resonant cavity for coaxial resonant diplexer, and coaxial resonant diplexer thereof
CN102299394B (en) Supernormal medium ultrahigh frequency band pass filter
CN204067532U (en) A kind of double frequency band-pass filter based on defect microstrip line
CN102881972A (en) Miniaturized UWB filter based on interdigital capacitor
CN201025627Y (en) A novel coupling structure
CN102593559A (en) T-shaped micro-strip dual-mode band-pass filter
CN205828610U (en) A kind of miniaturization cavity duplexer being applied to digital high-frequency amplification station
CN105048031B (en) The micro band superwide band wave filter realized using UC PBG and interdigital structure
CN103545584A (en) Broadband band-pass filter low in insertion loss
CN202534756U (en) Compact type dual mode open circuit loop band pass filter
CN202721248U (en) Asymmetric branch line-loaded resonator unit-based microstrip band-pass filter
CN207910037U (en) A kind of miniaturization LTE cavity body filters applied to diversity reception digital optical fiber direct station
CN204333184U (en) Based on the compact bimodulus microstrip filter of E type resonator and T-shaped feeder line
CN206564316U (en) A kind of POI combiners module
CN206259470U (en) A kind of three port combiners of seven frequency
CN204333182U (en) Based on the double-mode double-band narrow band filter of E type resonator and T-shaped feeder line
CN204333183U (en) Based on the compact bimodulus Wide stop bands filter of E type resonator and T-shaped feeder line

Legal Events

Date Code Title Description
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