CN106876845A - The three trap bandpass filters based on step electric impedance resonator and open circuit minor matters - Google Patents
The three trap bandpass filters based on step electric impedance resonator and open circuit minor matters Download PDFInfo
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- CN106876845A CN106876845A CN201510943454.7A CN201510943454A CN106876845A CN 106876845 A CN106876845 A CN 106876845A CN 201510943454 A CN201510943454 A CN 201510943454A CN 106876845 A CN106876845 A CN 106876845A
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- electric impedance
- step electric
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/201—Filters for transverse electromagnetic waves
- H01P1/203—Strip line filters
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- Electromagnetism (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention discloses the three trap bandpass filters based on step electric impedance resonator and open circuit minor matters, the wave filter includes 4 λ/4 short circuit minor matters resonator (101) of foldable structure, step electric impedance resonator (102), two input/output ports (103), double open circuits minor matters (104), half-wavelength microstrip line (105), medium substrate (106), the metal ground plate (107) under medium substrate.The present invention realizes the bandpass filter with three trap characteristics using step electric impedance resonator and open circuit minor matters.Wave filter design is simple, compact conformation, easy to process, with low cost.
Description
Technical field
The present invention proposes the three trap bandpass filters based on step electric impedance resonator and open circuit minor matters, and the wave filter is that have three
The ultra-wide band filter of trap.λ/4 short circuit the minor matters of 4 foldable structures realize the ultra wide band characteristic of wave filter, herein basis
Upper loading stepped-impedance resonator and open circuit minor matters realize three trap bandpass filters.
Background technology
2 months 2002, FCC (FCC) approval 3.1-10.6GHz frequency ranges were used for business telecommunication, because
This ultra wide band is widely used.However, in the commercial scope of FCC definition, ultra-broadband signal may be subject to such as WiAX
The interference of the signal such as (3.5-GHz), WLAN (5.15-5.825GHz), RFID (6.8GHz).How co-channel interference is solved
Important content is studied as ultra wide band, multiband filter is used as one of indispensable Primary Component, ultra-wide in Multi-Frequency Signaling System
Band double frequency band-pass filter obtains extensive concern and research.
Some mentalities of designing, such as multimode resonator (MMR), via structure are occurred in that in recent years, although this writes structure, energy is real
The effect of existing trap, but the size of these structures is larger, and trap is non-adjustable.So design wave filter trap is precipitous, size
Three compact trap bandpass filters are significant.
The content of the invention
The purpose of the present invention be is a kind of precipitous trap, small size are provided, with three trap characteristics and the adjustable filtering of trap
Device, the wave filter can reduce interference of the WLAN signal to UWB signal, realize ultra-wideband communication system and narrowband systems it
Between communication for coordination.
The technical solution adopted in the present invention：
The three trap bandpass filters based on step electric impedance resonator and open circuit minor matters, including 4 λ/4 short circuits of foldable structure
Minor matters resonator (101), step electric impedance resonator (102), two input/output ports (103), double open circuits minor matters (104),
Half-wavelength microstrip line (105), medium substrate (106), the metal ground plate (107) under medium substrate.
The three trap bandpass filters based on step electric impedance resonator and open circuit minor matters according to claim 1, its feature
Be medium plate surface 4 foldable structures λ/4 short circuit minor matters resonator (101), step electric impedance resonator (102), two defeated
Enter output port (103), double open circuits minor matters (104), half-wavelength microstrip line (105) is symmetrical.
The three trap bandpass filters based on step electric impedance resonator and open circuit minor matters according to claim 1, its feature
It is the characteristic that ultra wide band is realized with 4 λ/4 short circuit minor matters resonator (101) of foldable structure.
The invention wave filter has following characteristic and advantage relative to existing wave filter：
Design simple, compact conformation, easy to process, with low cost, passband is adjustable, bandpass characteristics is adjustable.
The invention wave filter includes a step electric impedance resonator.
The invention wave filter can adjust two centre frequencies of passband by changing the size of step electric impedance resonator.
The invention wave filter can produce two by changing the two-part impedance ratio of step electric impedance resonator on the inside of passband
Transmission zero.
Brief description of the drawings
Fig. 1 is the basic structure top view of embodiment of the present invention；
Fig. 2 is the basic structure dimensional drawing of embodiment of the present invention；
Fig. 3 is the basic structure side view of embodiment of the present invention；
Fig. 4 is the frequency response characteristic of embodiment of the present invention；
Specific embodiment
The present invention devises the three trap bandpass filters based on step electric impedance resonator and open circuit minor matters, and the wave filter trap can
Adjust, passband is adjustable.
The invention is described in more detail below in conjunction with the accompanying drawings：
As shown in figure 1, the three trap bandpass filters based on step electric impedance resonator and open circuit minor matters designed by the present invention,
4 λ/4 short circuit minor matters resonator (101) of foldable structure, step electric impedance resonator (102), two input/output ports (103),
Double open circuits minor matters (104), half-wavelength microstrip line (105) uses copper product.
An example of the present invention is as shown in Fig. 2 it is 2.2 that medium substrate (106) is K dielectric constant
RT/Duorid5880, the thickness of the medium substrate is 1.0mm, and the metal ground plate (107) under medium substrate uses copper product.
As shown in Fig. 2 the three trap bandpass filters based on step electric impedance resonator and open circuit minor matters designed by the present invention,
By the centre frequency and passband width that adjust the size of step electric impedance resonator (102) to adjust the first passband and the second passband, lead to
The length of double open circuits minor matters (104) is overregulated to adjust the centre frequency and passband width of the 3rd passband.
The design parameter of the three trap bandpass filters based on step electric impedance resonator and open circuit minor matters designed by the invention is such as
Under：L1=5mm, L2=14mm, L3=4mm, L4=5.3mm, L5=2mm, L6=2mm, L7=2mm,
R1=0.1mm, W1=1.7mm, W2=3mm, W3=0.3mm, W5=3mm, W6=2mm, specific structure is as schemed
Shown in 3.
The design of multimode resonator：The characteristic of ultra wide band is realized in λ/4 short circuit minor matters resonator (101) of 4 foldable structures,
Loading stepped-impedance resonator and open circuit minor matters realize three trap bandpass filters on this basis.
The frequency response characteristic that Fig. 4 provides wave filter includes return loss | S11| and insertion loss | S21|.As seen from the figure, echo
Loss | S11| and insertion loss | S21| respectively less than -15dB, the wave filter is realized in 4.8Ghz frequency ranges, 6.7Ghz frequency ranges and 9.5Ghz
Three trap characteristics of frequency range, and isolation effect between the selectivity and passband of passband is very good.
Claims (3)
1. the three trap bandpass filters based on step electric impedance resonator and open circuit minor matters, including 4 λ/4 short circuit minor matters of foldable structure
Resonator (101), step electric impedance resonator (102), two input/output ports (103), double open circuits minor matters (104), half
Wave microstrip line (105), medium substrate (106), the metal ground plate (107) under medium substrate.
2. it is according to claim 1 based on step electric impedance resonator and open circuit minor matters three trap bandpass filters, it is characterized in that be situated between
λ/4 short circuit minor matters resonator (101) of 4 foldable structures on scutum surface, step electric impedance resonator (102), two are defeated
Enter output port (103), double open circuits minor matters (104), half-wavelength microstrip line (105) is symmetrical.
3. it is according to claim 1 based on step electric impedance resonator and open circuit minor matters three trap bandpass filters, it is characterized in that with
The characteristic of ultra wide band is realized in λ/4 short circuit minor matters resonator (101) of 4 foldable structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510943454.7A CN106876845A (en) | 2015-12-13 | 2015-12-13 | The three trap bandpass filters based on step electric impedance resonator and open circuit minor matters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510943454.7A CN106876845A (en) | 2015-12-13 | 2015-12-13 | The three trap bandpass filters based on step electric impedance resonator and open circuit minor matters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106876845A true CN106876845A (en) | 2017-06-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510943454.7A Pending CN106876845A (en) | 2015-12-13 | 2015-12-13 | The three trap bandpass filters based on step electric impedance resonator and open circuit minor matters |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109713411A (en) * | 2019-02-21 | 2019-05-03 | 华南理工大学 | A kind of micro-strip double-frequency broadband filter |
| 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 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101752635A (en) * | 2010-01-14 | 2010-06-23 | 华东交通大学 | Dual-band band-pass filter with controllable band width |
| CN202523821U (en) * | 2012-02-29 | 2012-11-07 | 南京航空航天大学 | Ultra-wideband filter |
| CN203039051U (en) * | 2013-01-04 | 2013-07-03 | 成都信息工程学院 | Microstrip low-pass filter |
| CN103199325A (en) * | 2013-03-09 | 2013-07-10 | 西安电子科技大学 | Band gap reconfigurable micro-band ultra wide band filter |
-
2015
- 2015-12-13 CN CN201510943454.7A patent/CN106876845A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101752635A (en) * | 2010-01-14 | 2010-06-23 | 华东交通大学 | Dual-band band-pass filter with controllable band width |
| CN202523821U (en) * | 2012-02-29 | 2012-11-07 | 南京航空航天大学 | Ultra-wideband filter |
| CN203039051U (en) * | 2013-01-04 | 2013-07-03 | 成都信息工程学院 | Microstrip low-pass filter |
| CN103199325A (en) * | 2013-03-09 | 2013-07-10 | 西安电子科技大学 | Band gap reconfigurable micro-band ultra wide band filter |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109713411A (en) * | 2019-02-21 | 2019-05-03 | 华南理工大学 | A kind of micro-strip double-frequency broadband filter |
| CN109713411B (en) * | 2019-02-21 | 2023-11-03 | 华南理工大学 | Microstrip dual-frequency broadband filter |
| 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 |
| CN110600842B (en) * | 2019-10-21 | 2024-06-21 | 合肥师范学院 | Four-frequency-band microstrip band-pass filter with notch characteristic and design method thereof |
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Application publication date: 20170620 |