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CN105789765A - Dual-mode resonator based controllable UWB (ultra-wide-band) dual-band band-pass filter - Google Patents

Dual-mode resonator based controllable UWB (ultra-wide-band) dual-band band-pass filter Download PDF

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Publication number
CN105789765A
CN105789765A CN201410809755.6A CN201410809755A CN105789765A CN 105789765 A CN105789765 A CN 105789765A CN 201410809755 A CN201410809755 A CN 201410809755A CN 105789765 A CN105789765 A CN 105789765A
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China
Prior art keywords
dual
band
mode resonator
resonator
passband
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Pending
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CN201410809755.6A
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Chinese (zh)
Inventor
郑学梅
孟祥余
张兰超
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Harbin Heishi Technology Co Ltd
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Harbin Heishi Technology Co Ltd
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Priority to CN201410809755.6A priority Critical patent/CN105789765A/en
Publication of CN105789765A publication Critical patent/CN105789765A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a dual-mode resonator based controllable UWB (ultra-wide-band) dual-band band-pass filter. The filter comprises the dual-mode resonator (101) loaded by a middle short-circuit stub, two half-wavelength resonators (102), input and output ports (103), a dielectric substrate (104), and a metal grounding plate (105) below the dielectric substrate. According to the filter, two independent resonant modes can be realized through the short-circuit-stub-loaded dual-mode resonator; and meanwhile, the filter is simple in design, compact in structure, convenient to manufacture, low in cost, and capable of realizing an adjustable dual-band passing band performance.

Description

Controlled UWB double frequency band-pass filter based on dual-mode resonator
Technical field
The present invention relates to the controlled UWB double frequency band-pass filter based on dual-mode resonator, this wave filter is a kind of double mode resonator, and realizes the lowpass band of source load coupling.Two passbands of double frequency filter are respectively provided with the coupling of independent end and Incoupling structure, have dual-passband frequency and all individually controllable double frequency band-pass filter of bandwidth ensureing to achieve on the undersized basis of wave filter.
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 double frequency band-pass filter obtains extensive concern and research.
Occurring in that some mentalities of designing in recent years, existing module double-frequency micro-strip filter prevailing design approach mainly has two kinds, and the first is to utilize multiple single-pass band filter modular design dual frequency filter.The second is to utilize dual-mode resonator to design double frequency filter, including step electric impedance resonator double frequency filter, loaded type resonator double frequency filter.Wave filter overall dimensions designed by first method is big, cost is high, is unfavorable for the miniaturization of Multi-Frequency Signaling System.Double frequency filter designed by second method is easy to control, but can only basically reach each band connection frequency of double frequency filter, and the bandwidth of achieved passband is too small.So design double frequency filter can realize big bandwidth and double frequency UWB wave filter that dual-passband is controlled have great importance.
Summary of the invention
The double frequency UWB 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 controlled UWB double frequency band-pass filter based on dual-mode resonator, including the dual-mode resonator (101) that short circuit minor matters in the middle of dielectric-slab surface load, two embedded half-wave resonator (102), the input/output port (103) being joined directly together by tap coupler mode with two resonators, medium substrate (104), the metal ground plate (105) under medium substrate.
The described novel controlled UWB double frequency band-pass filter based on dual-mode resonator, it is characterized in that the dual-mode resonator (101) that the middle short circuit minor matters on dielectric-slab surface load, two embedded half-wave resonator (102) are symmetrical about the grounding through hole at center with the input/output port (103) that resonator is joined directly together by tap coupler mode.
The described novel controlled UWB double frequency band-pass filter based on dual-mode resonator, it is characterized in that 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 3 part microstrip lines of the dual-mode resonator (101) that middle short circuit minor matters load, change the band connection frequency of the first passband.
The described novel controlled UWB double frequency band-pass filter based on dual-mode resonator, it is characterized in that two half-wave resonator (102) with embedded control the characteristic of the second passband, by changing the length sum of its each several part microstrip line, change the band connection frequency of the second 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.During embedded resonator works, this wave filter is operated in the second passband.
When wave filter is operated in the first passband, U-shaped 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 U-shaped opening resonators, improves the first passband selectivity.
When wave filter is operated in the second passband, connect between the direct and U-shaped opening resonator of input port output port, form tap feed, it is possible to respectively introduce a transmission zero in passband 2 both sides, be effectively improved the selectivity of the 3rd passband.
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 of the invention process example;
Detailed description of the invention
The present invention devises the controlled double frequency band-pass filter of bandwidth compact, 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 (104) is K dielectric constant is the ArlonDiClad880 of 2.2.The thickness of this medium substrate is 0.508mm, and the metal ground plate (105) under medium substrate adopts copper product.
As shown in Figure 1, the controlled double frequency band-pass filter of bandwidth compact of the present invention, dual-mode resonator (101), embedded two half-wave resonator (102) and input/output port (103) that middle short circuit minor matters load adopt copper product.
As shown in Figure 2, the controlled double frequency band-pass filter 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 first passband by regulating the length of each microstrip line of embedded two half-wave resonator (102).
The design parameter of the UWB wave filter of the double; two trap characteristic of this invention: size following L=0.48mm, L1=5.90mm, L2=L3=0.60mm, the L4=4.28mm of parameters, L5=12.32mm, L6=17.3mm, L7=4.11mm, L8=2.78mm, L9=10.64mm, L10=6.16mm, W1=2.00mm, W2=W3=0.50mm, W4=1.28mm, W5=1.00mm, S=0.64mm, d=3.48mm, g1=0.22mm, g2=0.52mm, R=0.60mm.
The selection of medium substrate: dielectric constant is the ArlonDiClad880 of 2.2.The dielectric constant of general medium substrate is between 2--9.8, and the present invention adopts the substrate of 2.2.The thickness of this medium substrate is that 0.508mm meets required intensity.
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 U-shaped opening resonators, improves the first passband selectivity.Control the characteristic of the second passband with two embedded half-wave resonator (102), between the microstrip line that two U-shaped opening resonators are adjacent, form parallel coupling, it is possible between two passbands, produce a zero point, be effectively improved the stopband attenuation between passband.
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.As seen from the figure, this wave filter achieves two passbands in 2.45GHz frequency range and 5.27GHz frequency range, and the isolation effect between the selectivity of passband and passband is very good.

Claims (4)

1. based on the controlled UWB double frequency band-pass filter of dual-mode resonator, including the dual-mode resonator (101) that short circuit minor matters in the middle of dielectric-slab surface load, two embedded half-wave resonator (102), the input/output port (103) being joined directly together by tap coupler mode with two resonators, medium substrate (104), the metal ground plate (105) under medium substrate.
2. the controlled UWB double frequency band-pass filter based on dual-mode resonator according to claim 1, it is characterized in that the dual-mode resonator (101) that the middle short circuit minor matters on dielectric-slab surface load, two embedded half-wave resonator (102) are symmetrical about the grounding through hole at center with the input/output port (103) that resonator is joined directly together by tap coupler mode.
3. the controlled UWB double frequency band-pass filter based on dual-mode resonator described in, it is characterized in that 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 3 part microstrip lines of the dual-mode resonator (101) that middle short circuit minor matters load, change the band connection frequency of the first passband.
4. the controlled UWB double frequency band-pass filter based on dual-mode resonator described in, it is characterized in that two half-wave resonator (102) with embedded control the characteristic of the second passband, by changing the length sum of its each several part microstrip line, change the band connection frequency of the second passband.
CN201410809755.6A 2014-12-23 2014-12-23 Dual-mode resonator based controllable UWB (ultra-wide-band) dual-band band-pass filter Pending CN105789765A (en)

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CN201410809755.6A CN105789765A (en) 2014-12-23 2014-12-23 Dual-mode resonator based controllable UWB (ultra-wide-band) dual-band band-pass filter

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CN105789765A true CN105789765A (en) 2016-07-20

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113991269A (en) * 2021-09-18 2022-01-28 天津大学 Miniaturized high-harmonic-suppression dual-passband filter based on dielectric integrated suspension line
CN115425376A (en) * 2022-09-29 2022-12-02 河南科技大学 Double-passband filter based on branch knot loading

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113991269A (en) * 2021-09-18 2022-01-28 天津大学 Miniaturized high-harmonic-suppression dual-passband filter based on dielectric integrated suspension line
CN113991269B (en) * 2021-09-18 2022-07-12 天津大学 Miniaturized high-harmonic-suppression dual-passband filter based on dielectric integrated suspension line
CN115425376A (en) * 2022-09-29 2022-12-02 河南科技大学 Double-passband filter based on branch knot loading
CN115425376B (en) * 2022-09-29 2023-09-08 河南科技大学 Double-passband filter based on branch loading

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