CN204706614U - Based on ultra broadband three band-pass filter of multimode resonator - Google Patents
Based on ultra broadband three band-pass filter of multimode resonator Download PDFInfo
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- CN204706614U CN204706614U CN201420826078.4U CN201420826078U CN204706614U CN 204706614 U CN204706614 U CN 204706614U CN 201420826078 U CN201420826078 U CN 201420826078U CN 204706614 U CN204706614 U CN 204706614U
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Abstract
The utility model discloses ultra broadband three band-pass filter based on multimode resonator.The dual-mode resonator (101) that the first middle short circuit minor matters that this filter comprises dielectric-slab surface load, the dual-mode resonator (102) that second middle short circuit minor matters load, two embedded half-wave resonator (103), input/output port (104), medium substrate (105), the metal ground plate (106) under medium substrate.The utility model utilizes short circuit minor matters to load dual-mode resonator and half-wave resonator realizes the controlled mode of resonance of three independence.The pass-band performance of three passbands of this filter is independent controlled, simplicity of design, compact conformation, easy to process, with low cost.
Description
Technical field
The utility model relates to ultra broadband three band-pass filter based on multimode resonator, this filter has independently end coupling and Incoupling structure respectively at three passbands, on the guarantee undersized basis of filter, achieve and there are three band connection frequencies and all independent three controlled band-pass filters of bandwidth.
Background technology
In February, 2002, FCC (FCC) ratifies 3.1-10.6GHz frequency range for business telecommunication, and therefore UWB is widely used.But in the commercial scope of FCC definition, UWB signal may be subject to the interference of the signals such as such as WiAX (3.5-GHz), WLAN (5.15-5.825GHz), RFID (6.8GHz).How to solve co-channel interference and become UWB research important content, multiband filter is as one of Primary Component indispensable in Multi-Frequency Signaling System, and UWB tri-band-pass filter obtains extensive concern and research.
Occurred some mentalities of designing in recent years, existing multifrequency microstrip filter prevailing design approach mainly contains two kinds, and the first utilizes multiple single-pass band filter Combination Design multiband filter.The second utilizes dual-mode resonator to design multiband filter, comprises step electric impedance resonator multiband filter, loaded type resonator multiband filter.Overall filter size designed by first method is large, cost is high, is unfavorable for the miniaturization of Multi-Frequency Signaling System.Multiband filter designed by second method is easy to control, but substantially can only reach each band connection frequency of multiband filter, and the bandwidth of achieved passband is too small.So design multiband filter can realize large bandwidth and the UWB tri-that dual-passband is controlled frequently filter have great importance.
Utility model content
The purpose of this utility model is that the UWB tri-frequency filter constructing dual-passband controlled has two groups of resonators, namely the dual-mode resonator that peripheral middle short circuit minor matters load and embedded two half-wave resonator, input/output port is directly connected with two resonators respectively by tap coupler.
The technical scheme that the utility model adopts:
A kind of novel ultra broadband three band-pass filter based on multimode resonator, the dual-mode resonator (101) that the first middle short circuit minor matters that this filter comprises dielectric-slab surface load, the dual-mode resonator (102) that second middle short circuit minor matters load, two embedded half-wave resonator (103), input/output port (104), medium substrate (105), the metal ground plate (106) under medium substrate.
The dual-mode resonator (101) of the first middle short circuit minor matters loading of this utility model filter, the dual-mode resonator (102) that second middle short circuit minor matters load, two embedded half-wave resonator (103), input/output port (103) is symmetrical about the grounding through hole at center.
This utility model filter dual-mode resonator (101) that middle short circuit minor matters load controls the characteristic of the first passband, by changing the length sum of each several part microstrip line of the dual-mode resonator (101) that middle short circuit minor matters load, change the band connection frequency of the first passband.
The dual-mode resonator (102) that in this utility model filter use, the second middle short circuit minor matters load controls the characteristic of the second passband, by changing the length sum of each several part microstrip line of the dual-mode resonator (102) that middle short circuit minor matters load, change the band connection frequency of the second passband.
This utility model filter controls the characteristic of the 3rd passband with embedded two half-wave resonator (103), by changing the length sum of its each several part microstrip line, changes the band connection frequency of the 3rd passband.
This utility model filter has following characteristic and advantage relative to existing filter:
Simplicity of design, compact conformation, easy to process, with low cost, passband is adjustable, and bandpass characteristics is adjustable.
When peripheral short circuit minor matters load dual-mode resonator work, this filter is operated in the first passband.Even mould fundamental frequency independently can be controlled by middle short circuit minor matters, thus coupling size when can control passband 1.
During dual-mode resonator (102) work that the second middle short circuit minor matters load, this filter is operated in the second passband.Opening resonator does not work and as the part of input port output port, by adjusting the coupling space source of the introducing-load coupling of two adjacent opening resonators.
During opening resonator works, when filter is operated in the 3rd passband, input port output port directly and between opening resonator connects, and forms tap feed.
Accompanying drawing explanation
Fig. 1 is the basic structure vertical view of the utility model embodiment;
Fig. 2 is the basic structure end view of the utility model embodiment;
Fig. 3 is the frequency response characteristic figure of the utility model embodiment;
Embodiment
The utility model devises bandwidth compact controllable multi-frequency band pass filter, and this filter trap is adjustable, passband is adjustable, and both adjustment do not interfere with each other.
Below in conjunction with accompanying drawing distance, utility model is described in more detail:
An example of the present utility model as shown in Figure 2, medium substrate (105) to be K dielectric constant be 2.2 Arlon DiClad 880.The thickness of this medium substrate is 0.508mm, and the thickness of this medium substrate is that 0.508mm meets required intensity, and the metal ground plate (105) under medium substrate adopts copper product.
As shown in Figure 1, controlled three band-pass filters of bandwidth compact of the present utility model, the dual-mode resonator (102) that the dual-mode resonator (101) that middle short circuit minor matters load, first of inner side the middle short circuit minor matters load, embedded two half-wave resonator (103) and input/output port (104) adopt copper product.
As shown in Figure 2, controlled three band-pass filters of bandwidth compact of the present utility model, wherein adjusted the bandpass characteristics of the first passband by the length of dual-mode resonator (101) each microstrip line regulating middle short circuit minor matters to load, regulated the bandpass characteristics of the second passband by the length of each microstrip line regulating two embedded half-wave resonator (102).
The design parameter of the UWB filter of the two trap characteristic of this utility model: size following L=0.48mm, L1=5.90mm, the L2=L3=0.60mm of parameters, L4=4.28mm, L5=12.32mm, L6=17.3mm, L7=4.11mm, L8=1.62mm, L9=2.36mm, L10=2.32mm, L11=4.12mm, L12=10.64mm, W1=2.00mm, W2=W3=0.50mm, W4=0.60mm, W5=1.00mm, S=0.64mm, d=3.48mm, g1=0.32mm, g2=0.38mm, g3=0.36mm, g4=0.36mm, R=0.30mm.
The design of multimode resonator: the dual-mode resonator (101) that middle short circuit minor matters load controls the characteristic of the first passband, by adjusting the coupling space source of the introducing-load coupling of two adjacent opening resonators.Control the characteristic of the second passband with embedded two half-wave resonator (102), between the microstrip line that two opening resonators are adjacent, form parallel coupling.During opening resonator works, filter is operated in the 3rd passband.By the design in be coupled gap and tap position, freely can control the end coupling size under three passbands, realize the design of three pass band widths.
Namely the frequency response characteristic that Fig. 3 provides filter comprises transmission characteristic | S21| amplitude response, reflection characteristic namely | S11| amplitude response, in addition, also requires to have smooth delay character in passband for ultra-wide band filter.Three transmission zeros lay respectively at 2.04GHz, 5.06GHz, 6.83GHz; Decay between each passband of three frequency filters is all greater than 20dB, and each passband has good selectivity.
Claims (5)
1. novel ultra broadband three band-pass filter based on multimode resonator, the dual-mode resonator (101) that the first middle short circuit minor matters that this filter comprises dielectric-slab surface load, the dual-mode resonator (102) that second middle short circuit minor matters load, two embedded half-wave resonator (103), input/output port (104), medium substrate (105), the metal ground plate (106) under medium substrate.
2. ultra broadband three band-pass filter based on multimode resonator according to claim 1, it is characterized in that the dual-mode resonator (101) that the first middle short circuit minor matters load, the dual-mode resonator (102) that second middle short circuit minor matters load, two embedded half-wave resonator (103), input/output port (103) is symmetrical about the grounding through hole at center.
3. ultra broadband three band-pass filter based on multimode resonator according to claim 1, it is characterized in that the characteristic controlling the first passband with the dual-mode resonator (101) that middle short circuit minor matters load, by changing the length sum of each several part microstrip line of the dual-mode resonator (101) that middle short circuit minor matters load, change the band connection frequency of the first passband.
4. ultra broadband three band-pass filter based on multimode resonator according to claim 1, it is characterized in that the dual-mode resonator (102) of the second middle short circuit minor matters loading in using controls the characteristic of the second passband, by changing the length sum of each several part microstrip line of the dual-mode resonator (102) that middle short circuit minor matters load, change the band connection frequency of the second passband.
5. ultra broadband three band-pass filter based on multimode resonator according to claim 1, it is characterized in that the characteristic controlling the 3rd passband with embedded two half-wave resonator (103), by changing the length sum of its each several part microstrip line, change the band connection frequency of the 3rd passband.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420826078.4U CN204706614U (en) | 2014-12-23 | 2014-12-23 | Based on ultra broadband three band-pass filter of multimode resonator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420826078.4U CN204706614U (en) | 2014-12-23 | 2014-12-23 | Based on ultra broadband three band-pass filter of multimode resonator |
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| CN204706614U true CN204706614U (en) | 2015-10-14 |
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| CN201420826078.4U Expired - Fee Related CN204706614U (en) | 2014-12-23 | 2014-12-23 | Based on ultra broadband three band-pass filter of multimode resonator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107895829A (en) * | 2017-12-07 | 2018-04-10 | 电子科技大学 | A kind of microstrip filter with the accurate oval bandpass response of three ranks |
-
2014
- 2014-12-23 CN CN201420826078.4U patent/CN204706614U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107895829A (en) * | 2017-12-07 | 2018-04-10 | 电子科技大学 | A kind of microstrip filter with the accurate oval bandpass response of three ranks |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151014 Termination date: 20151223 |
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| EXPY | Termination of patent right or utility model |