CN105789764A - Multi-mode resonator based ultra-wide-band tri-band band-pass filter - Google Patents
Multi-mode resonator based ultra-wide-band tri-band band-pass filter Download PDFInfo
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- CN105789764A CN105789764A CN201410809754.1A CN201410809754A CN105789764A CN 105789764 A CN105789764 A CN 105789764A CN 201410809754 A CN201410809754 A CN 201410809754A CN 105789764 A CN105789764 A CN 105789764A
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Abstract
The invention discloses a multi-mode resonator based ultra-wide-band tri-band band-pass filter. The filter comprises a dual-mode resonator (101) loaded by a first middle short-circuit stub, a dual-mode resonator (102) loaded by a second middle short-circuit stub, two built-in half-wavelength resonators (103), and input and output ports (104) which are arranged on the surface of a dielectric substrate, the dielectric substrate (105), and a metal grounding plate (106) below the dielectric substrate. According to the filter, three independent and controllable resonant modes can be realized through the short-circuit-stub-loaded dual-mode resonators, and the half-wavelength resonator; the passing band characteristics of the three passing bands of the filter are independent and controllable; and meanwhile, the filter is simple in design, compact in structure, convenient to manufacture and low in cost.
Description
Technical field
The present invention relates to ultra broadband three band-pass filter based on multimode resonator, this wave filter is respectively provided with independent end coupling and Incoupling structure at three passbands, ensureing on the undersized basis of wave filter, it is achieved that there are three band connection frequencies and all individually controllable three 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 is likely to 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 solving 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.
Occurring in that some mentalities of designing in recent years, existing multifrequency microstrip filter prevailing design approach mainly has two kinds, and the first is to utilize multiple single-pass band filter modular design multiband filter.The second is to utilize dual-mode resonator to design multiband filter, including step electric impedance resonator multiband filter, loaded type resonator multiband filter.Wave filter overall dimensions designed by first method is big, cost is high, is unfavorable for the miniaturization of Multi-Frequency Signaling System.Multiband filter designed by second method is easy to control, but can only basically reach each band connection frequency of multiband filter, and the bandwidth of achieved passband is too small.So design multiband filter can realize big bandwidth and UWB tri-that dual-passband is controlled frequency wave filter have great importance.
Summary of the invention
The UWB tri-frequency wave filter that it is an object of the invention to structure dual-passband controlled has two groups of resonators, the dual-mode resonator of namely peripheral middle short circuit minor matters loading and embedded two half-wave resonator, input/output port is joined directly together respectively by tap coupler and two resonators.
The technical solution adopted in the present invention:
A kind of novel ultra broadband three band-pass filter based on multimode resonator, this wave filter includes the dual-mode resonator (101) that in the middle of the first of dielectric-slab surface, short circuit minor matters load, the dual-mode resonator (102) that in the middle of second, 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.
Described novel ultra broadband three band-pass filter based on multimode resonator is characterized in that, the dual-mode resonator (101) that in the middle of first, short circuit minor matters load, the dual-mode resonator (102) that in the middle of second, short circuit minor matters load, two embedded half-wave resonator (103), input/output port (103) is symmetrical about the grounding through hole at center.
Described novel ultra broadband three band-pass filter based on multimode resonator, the dual-mode resonator (101) loaded by middle short circuit minor matters 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.
Described novel ultra broadband three band-pass filter based on multimode resonator, with in short circuit minor matters load in the middle of second dual-mode resonator (102) control 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.
Described novel ultra broadband three band-pass filter based on multimode resonator, the characteristic of the 3rd passband is controlled with two embedded 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.
This invention wave filter has following characteristic and advantage relative to existing wave filter:
Design is simple, 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 wave filter is operated in the first passband.Even mould fundamental frequency can be independently controlled by middle short circuit minor matters, such that it is able to coupling size when controlling passband 1.
During dual-mode resonator (102) work that in the middle of second, short circuit minor matters load, this wave 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 introducing-load coupling of two adjacent opening resonators.
During opening resonator works, when wave filter is operated in three passbands, input port output port directly and connects between opening resonator, forms tap feed.
Accompanying drawing explanation
Fig. 1 is the basic structure top view of the invention process example；
Fig. 2 is the basic structure side view of the invention process example；
Fig. 3 is the frequency response characteristic figure of the invention process example；
Detailed description of the invention
The present invention devises bandwidth compact controllable multi-frequency band filter, and wave filter trap is adjustable, passband is adjustable for this, and both adjustment are not interfere with each other.
Below in conjunction with accompanying drawing distance, invention is described in more detail:
An example of the present invention is as in figure 2 it is shown, medium substrate (105) is K dielectric constant is the ArlonDiClad880 of 2.2.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 invention, dual-mode resonator (102), embedded two half-wave resonator (103) and input/output port (104) that in the middle of the middle dual-mode resonator (101) of short circuit minor matters loading, the first of inner side, short circuit minor matters load adopt copper product.
As shown in Figure 2, controlled three band-pass filters of bandwidth compact of the present invention, the length of dual-mode resonator (101) each microstrip line wherein loaded by short circuit minor matters in the middle of regulating adjusts the bandpass characteristics of the first passband, regulates the bandpass characteristics of the second passband by regulating the length of each microstrip line of embedded two half-wave resonator (102).
nullThe design parameter of the UWB wave filter of the double; two trap characteristic of this invention: the following L=0.48mm of size of parameters，L1=5.90mm，L2=L3=0.60mm，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 two embedded half-wave resonator (102), between the microstrip line that two opening resonators are adjacent, form parallel coupling.During opening resonator works, wave filter is operated in the 3rd passband.By coupling the design in gap and tap position, it is possible to freely control the end coupling size under three passbands, it is achieved the design of three pass band widths.
Fig. 3 provides the frequency response characteristic of wave filter and includes transmission characteristic i.e. | S21 | amplitude response, and reflection characteristic is | S11 | amplitude response, it addition, also require to have in passband smooth delay character for ultra-wide band filter.Three transmission zeros lay respectively at 2.04GHz, 5.06GHz, 6.83GHz；Decay between the three frequency each passbands of wave filter is all higher than 20dB, and each passband has good selectivity.
Claims (5)
1. bandwidth compact controlled UWB tri-band-pass filter, this wave filter includes the dual-mode resonator (101) that in the middle of the first of dielectric-slab surface, short circuit minor matters load, the dual-mode resonator (102) that in the middle of second, 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 is characterized in that, the dual-mode resonator (101) that in the middle of first, short circuit minor matters load, the dual-mode resonator (102) that in the middle of second, 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 described in, the dual-mode resonator (101) loaded by middle short circuit minor matters 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.
4. ultra broadband three band-pass filter based on multimode resonator described in, with in short circuit minor matters load in the middle of second dual-mode resonator (102) control 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 described in, controls the characteristic of the 3rd passband with two embedded 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.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410809754.1A CN105789764A (en) | 2014-12-23 | 2014-12-23 | Multi-mode resonator based ultra-wide-band tri-band band-pass filter |
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| CN201410809754.1A CN105789764A (en) | 2014-12-23 | 2014-12-23 | Multi-mode resonator based ultra-wide-band tri-band band-pass filter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107910623A (en) * | 2017-10-26 | 2018-04-13 | 上海海事大学 | The controllable low-loss compact quad-band bandpass filter of passband |
| CN110021803A (en) * | 2019-03-26 | 2019-07-16 | 西安理工大学 | There are three the ultra-wide band filters of trap frequency point for tool |
| CN110600842A (en) * | 2019-10-21 | 2019-12-20 | 合肥师范学院 | Four-frequency-band microstrip band-pass filter with trapped wave characteristic and design method thereof |
-
2014
- 2014-12-23 CN CN201410809754.1A patent/CN105789764A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107910623A (en) * | 2017-10-26 | 2018-04-13 | 上海海事大学 | The controllable low-loss compact quad-band bandpass filter of passband |
| CN110021803A (en) * | 2019-03-26 | 2019-07-16 | 西安理工大学 | There are three the ultra-wide band filters of trap frequency point for tool |
| CN110021803B (en) * | 2019-03-26 | 2020-12-18 | 西安理工大学 | Ultra-wideband filter with three trapped wave frequency points |
| CN110600842A (en) * | 2019-10-21 | 2019-12-20 | 合肥师范学院 | Four-frequency-band microstrip band-pass filter with trapped wave characteristic and design method thereof |
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Application publication date: 20160720 |