CN106876843A - Double trap bandpass filters of the double open circuit minor matters of toroidal cavity resonator loading - Google Patents
Double trap bandpass filters of the double open circuit minor matters of toroidal cavity resonator loading Download PDFInfo
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- CN106876843A CN106876843A CN201510943426.5A CN201510943426A CN106876843A CN 106876843 A CN106876843 A CN 106876843A CN 201510943426 A CN201510943426 A CN 201510943426A CN 106876843 A CN106876843 A CN 106876843A
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- minor matters
- double
- toroidal cavity
- circuit minor
- resonator
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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
-
- 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
- H01P1/2039—Galvanic coupling between Input/Output
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention discloses double trap bandpass filters of the double open circuit minor matters of toroidal cavity resonator loading, the wave filter includes 4 λ/4 short circuit minor matters resonator (101) of foldable structure, double open circuits minor matters resonator (102), toroidal cavity resonator (103), two input/output ports (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 double trap characteristics using the double open circuit minor matters of toroidal cavity resonator loading.Wave filter design is simple, compact conformation, easy to process, with low cost.
Description
Technical field
The present invention proposes double trap bandpass filters of the double open circuit minor matters of toroidal cavity resonator loading, and the wave filter is that have double traps
Ultra-wide band filter.λ/4 short circuit the minor matters of 4 foldable structures realize the ultra wide band characteristic of wave filter, by loading annular
Resonator and double open circuit minor matters resonators realize double 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
Compact double 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 double 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：
Double trap bandpass filters of the double open circuit minor matters of toroidal cavity resonator loading, including 4 λ/4 short circuit minor matters of foldable structure
Resonator (101), double open circuits minor matters resonator (102), toroidal cavity resonator (103), two input/output ports (104), half-wave
Microstrip line (105) long, medium substrate (106), the metal ground plate (107) under medium substrate.
Double trap bandpass filters of the double open circuit minor matters of toroidal cavity resonator loading according to claim 1, it is characterized in that being situated between
λ/4 short circuit minor matters resonator (101) of 4 foldable structures on scutum surface, double open circuits minor matters resonator (102), annular resonance
Device (103), two input/output ports (104), half-wavelength microstrip line (105) is symmetrical.
Double trap bandpass filters of the double open circuit minor matters of toroidal cavity resonator loading according to claim 1, 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.
Double trap bandpass filters of the double open circuit minor matters of toroidal cavity resonator loading according to claim 1, it is characterized in that logical
Cross the length of double open circuit minor matters resonator (102) of adjustment to adjust the first pass-band performance, by the length for adjusting toroidal cavity resonator (103)
To adjust the second pass-band performance.
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.
When toroidal cavity resonator (103) works, the wave filter is operated in the first passband.When double open circuits minor matters resonator (102) work,
The wave filter is operated in the second passband.
When wave filter is operated in the first passband, toroidal cavity resonator (103) does not work and as one of input port output port
Point, coupled come the source of introducing-load by adjusting the minor matters length of toroidal cavity resonator (103), improve the first passband selectivity.
When wave filter is operated in the second passband, double open circuit minor matters resonators (102) connect and input port, output port between,
Tap feed is formed, a transmission zero can be respectively introduced in passband both sides, the selectivity of the second passband is effectively improved.
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 double trap bandpass filters of the double open circuit minor matters of toroidal cavity resonator loading, the wave filter trap is adjustable,
Passband is adjustable.
The invention is described in more detail below in conjunction with the accompanying drawings：
As shown in figure 1, double trap bandpass filters of the double open circuit minor matters of toroidal cavity resonator loading designed by the present invention, 4
λ/4 short circuit minor matters resonator (101) of foldable structure, double open circuits minor matters resonator (102), toroidal cavity resonator (103), two are defeated
Enter output port (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 double trap bandpass filters of the double open circuit minor matters of toroidal cavity resonator loading designed by the present invention, pass through
Adjust the minor matters length of toroidal cavity resonator (103) to adjust the centre frequency and passband width of the first passband, by the double open circuit branches of regulation
The length of (102) is saved to adjust the centre frequency and passband width of the second passband.
The design parameter of double trap bandpass filters of the double open circuit minor matters of toroidal cavity resonator loading designed by the invention is as follows：
L1=5mm, L2=14mm, L3=4mm, L4=5.3mm, L6=2mm, L8=2mm, R1=0.1mm,
W1=1.7mm, W2=3mm, W3=0.3mm, W4=1.4mm, W8=0.3mm, specific structure are as shown in Figure 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,
First pass-band performance is realized by toroidal cavity resonator (103), one is respectively introduced in passband both sides by double open circuits minor matters resonator (102)
Transmission zero is with realizing the second pass-band performance.
The frequency response characteristic that Fig. 4 provides wave filter includes return loss | S11| and insertion loss | S21|.As seen from the figure, echo is damaged
Consumption | S11| and insertion loss | S21| respectively less than -15dB, the wave filter realizes two traps of 5.2GHz frequency ranges and 9.3GHz frequency ranges
Isolation between frequency range, and the selectivity and passband of the passband of wave filter is good.
Claims (4)
1. double trap bandpass filters of the double open circuit minor matters of toroidal cavity resonator loading, including 4 λ/4 short circuit minor matters resonance of foldable structure
Device (101), double open circuits minor matters resonator (102), toroidal cavity resonator (103), two input/output ports (104), half-wave
Microstrip line (105) long, medium substrate (106), the metal ground plate (107) under medium substrate.
2. toroidal cavity resonator according to claim 1 loads double trap bandpass filters of double open circuit minor matters, it is characterized in that dielectric-slab
λ/4 short circuit minor matters resonator (101) of 4 foldable structures on surface, double open circuits minor matters resonator (102), annular resonance
Device (103), two input/output ports (104), half-wavelength microstrip line (105) is symmetrical.
3. toroidal cavity resonator according to claim 1 loads double trap bandpass filters of double open circuit minor matters, it is characterized in that with 4
The characteristic of ultra wide band is realized in λ/4 short circuit minor matters resonator (101) of foldable structure.
4. toroidal cavity resonator according to claim 1 loads double trap bandpass filters of double open circuit minor matters, it is characterized in that by adjusting
The length of whole double open circuit minor matters resonator (102) adjusts the first pass-band performance, by the length for adjusting toroidal cavity resonator (103)
To adjust the second pass-band performance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510943426.5A CN106876843A (en) | 2015-12-13 | 2015-12-13 | Double trap bandpass filters of the double open circuit minor matters of toroidal cavity resonator loading |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510943426.5A CN106876843A (en) | 2015-12-13 | 2015-12-13 | Double trap bandpass filters of the double open circuit minor matters of toroidal cavity resonator loading |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106876843A true CN106876843A (en) | 2017-06-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510943426.5A Pending CN106876843A (en) | 2015-12-13 | 2015-12-13 | Double trap bandpass filters of the double open circuit minor matters of toroidal cavity resonator loading |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109524749A (en) * | 2018-11-23 | 2019-03-26 | 西安交通大学 | A kind of double-passband filter with trap characteristic |
| CN109713411A (en) * | 2019-02-21 | 2019-05-03 | 华南理工大学 | A kind of micro-strip double-frequency broadband filter |
| CN109742497A (en) * | 2019-02-28 | 2019-05-10 | 南京邮电大学 | A kind of four port reflectionless filter of transmission line |
| 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 |
| CN112310584A (en) * | 2020-10-30 | 2021-02-02 | 广东鸿展通信技术有限公司 | Ring filter |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203056054U (en) * | 2012-12-06 | 2013-07-10 | 哈尔滨飞羽科技有限公司 | Double-trap-wave UWB filter with adjustable trap waves and adjustable pass-band |
| 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 |
| CN204067531U (en) * | 2014-09-16 | 2014-12-31 | 电子科技大学 | The microstrip filter that a kind of transmission zero is controlled |
-
2015
- 2015-12-13 CN CN201510943426.5A patent/CN106876843A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203056054U (en) * | 2012-12-06 | 2013-07-10 | 哈尔滨飞羽科技有限公司 | Double-trap-wave UWB filter with adjustable trap waves and adjustable pass-band |
| 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 |
| CN204067531U (en) * | 2014-09-16 | 2014-12-31 | 电子科技大学 | The microstrip filter that a kind of transmission zero is controlled |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109524749A (en) * | 2018-11-23 | 2019-03-26 | 西安交通大学 | A kind of double-passband filter with trap characteristic |
| 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 |
| CN109742497A (en) * | 2019-02-28 | 2019-05-10 | 南京邮电大学 | A kind of four port reflectionless filter of transmission line |
| CN109742497B (en) * | 2019-02-28 | 2021-04-06 | 南京邮电大学 | Four-port reflection-free filter of transmission line |
| 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 |
| CN112310584A (en) * | 2020-10-30 | 2021-02-02 | 广东鸿展通信技术有限公司 | Ring filter |
| CN112310584B (en) * | 2020-10-30 | 2021-11-05 | 广东鸿展通信技术有限公司 | Ring filter |
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Application publication date: 20170620 |