CN203056053U - Microstrip broad band filter based on double circular multi-mode resonator - Google Patents
Microstrip broad band filter based on double circular multi-mode resonator Download PDFInfo
- Publication number
- CN203056053U CN203056053U CN 201220662872 CN201220662872U CN203056053U CN 203056053 U CN203056053 U CN 203056053U CN 201220662872 CN201220662872 CN 201220662872 CN 201220662872 U CN201220662872 U CN 201220662872U CN 203056053 U CN203056053 U CN 203056053U
- Authority
- CN
- China
- Prior art keywords
- microstrip
- filter based
- double circle
- multimode resonator
- mode resonator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The utility model discloses a microstrip broad band filter based on a double circular multi-mode resonator. The microstrip broad band filter based on the double circular multi-mode resonator comprises a metal microstrip patch (30) and a metal earth plate (50), which are formed on the upper and lower surfaces of a dielectric-slab (40) respectively. The metal microstrip patch (30) comprises the double circular multi-mode resonator (10) and two stop band parts (20, 21), wherein the double circular multi-mode resonator is based on the combination and improvements of a stepped impedance full-wavelength ring resonator (SORR) and a stepped impedance half-wavelength resonator (SHR) and is mainly composed of two circular shapes (11, 12) of which the diameters are different, and the two stop band parts (20, 21) are based on a unsymmetrical Pi-type structure and are applied to an input/output part. The microstrip broad band filter based on the double circular multi-mode resonator has the characteristics that the structure is compact, an upper stop band is wide, an insertion loss in a passband is small, etc.
Description
Technical field
The utility model is related to a kind of microstrip broadband bandpass filter based on Double Circle multimode resonator, the broadband band-pass filter compact conformation, size are small, there is less insertion loss, while there is wider upper stopband, with good broadband character and higher frequency selectivity in passband.
Background technology
In recent years, with ultra wide band（UWB）Technology also accelerates developing rapidly for broadband filter technology in the continuous application of wireless communication technology and wireless multimedia service, and diversified multimode resonator structure is widely used in the design of broadband filter, to improve the broadband character of wave filter.Although being also more satisfied with from the point of view of existing broadband filter actual performance, still have several drawbacks that part is needed to be improved.
The existing broadband filter based on multimode resonator, such as based on bimodulus, the synthesis of three mode step shape electric impedance resonators or two kinds of resonators and the broadband band-pass filter designed, relative bandwidth can reach more than 50%, but hardly result in relatively low insertion loss.Certain improvement had been carried out for above-mentioned broadband filter later, toroidal cavity resonator is introduced, relatively low logical in-band insertion loss is obtained, but accordingly still there is very big deficiency in the performance such as upper resistance band and frequency selection.Therefore a kind of Wide stop bands, high-frequency selectivity and the broadband band-pass filter with low insertion loss is designed to have great importance.
Utility model content
In order to improve the performance such as upper resistance band, insertion loss in existing broadband filter, the utility model provides a kind of microstrip broadband wave filter based on Double Circle multimode resonator, wherein using new Double Circle multimode resonator（10）For improving performance in passband, two band resistance parts point are constituted using the π types structure of asymmetry（20,21）For widening upper stopband.
The technical scheme that the utility model is used is：
A kind of microstrip broadband wave filter based on Double Circle multimode resonator, it is characterised in that including being formed at dielectric-slab（40）The metal micro-strip paster on upper and lower surface（30）And metal ground plate（50）, the metal micro-strip paster include Double Circle multimode resonator（10）, two band resistance parts point（20,21）.
A kind of described microstrip broadband wave filter based on Double Circle multimode resonator, it is characterised in that Double Circle multimode resonator（10）With two band resistance parts point（20,21）Intercoupled with Coupled Miccrostrip Lines.
A kind of described microstrip broadband wave filter based on Double Circle multimode resonator, it is characterised in that Double Circle multimode resonator（10）Mainly by the different circle of two diameters（11,12）Constitute.
A kind of described microstrip broadband wave filter based on Double Circle multimode resonator, it is characterised in that two band resistance parts point（20,21）Input/output section is applied to using asymmetric π types structure, it is by the unequal microstrip line counterfoil of two segment length that the π types band resistance part of asymmetric, which is divided to,（L1, L2）Constitute.
The utility model has the following advantages and characteristic relative to prior art：
（1）Compact conformation, size are small, it is easy to process, and make cheap.
（2）3dB relative bandwidths can reach more than 50%, and with wider upper stopband.
（3）With precipitous walled belt and very high frequency selectivity.
（4）Logical in-band insertion loss is very low, can reach below 1dB.
Brief description of the drawings
The basic structure top view of broadband filters of the Fig. 1 based on Double Circle multimode resonator；
Embodiment
In recent years; multimode ring type resonant device starts to be applied in the design of microstrip bandpass filter; this type filter makes full use of the characteristic that multiple modes of resonance are presented in passband; realize that multimode ring resonator has preferable broadband performance and its compact conformation; it is easy to process; applied widely, the utility model exactly utilizes the multi-resonant characteristic of resonance structure, devises a kind of inexpensive, high performance microstrip broadband bandpass filter.
Concrete structure of the present utility model is further described below in conjunction with the accompanying drawings.
As shown in figure 1, the utility model is made up of Double Circle multimode resonator (10), two band resistance parts point (20,21).Double Circle multimode resonator and two band resistance parts point are intercoupled by Coupled Miccrostrip Lines.
As shown in figure 1, the wave filter Double Circle multimode resonator（10）Partial size is：
Small circular（10）Diameter L9=5mm, it is big circular（11）Diameter L11=8mm, other parts size is：L4=0.60mm, L5=16.90mm, L8=27.445mm, L9=6.45mm, L10=0.91mm, s=0.37mm.
As shown in figure 1, the size of two band resistance parts point of the wave filter (20,21) part is：
The length of two microstrip line counterfoils：L1=7.99mm, L2=6.03mm.The size of the other structures of asymmetric π types structure is：L6=4.75mm, L7=0.74mm, L3=18.47mm。
Medium substrate（40）Selection：The size for the medium substrate that the utility model is used is 2cm*6cm, and its relative dielectric constant is 11.2, and the substrate price is relatively low, and loss is smaller, has a wide range of application.In practice, the medium substrate of other dielectric constant loss angles can be used according to practical application, the dielectric constant loss angle for the medium substrate that the utility model is used is 0.009, and its thickness is 1.6mm, the intensity needed for meeting.
Double Circle multimode resonator（10）Design：In recent years; multimode ring type resonant device starts to be widely applied in the design of microstrip broadband bandpass filter; such wave filter takes full advantage of the characteristic that multiple modes of resonance are presented in passband; realize that multimode toroidal cavity resonator has preferable broadband performance and its compact conformation, it is easy to process.The Double Circle multimode resonator of the utility model design is to be based on scalariform impedance all-wave length toroidal cavity resonator（SORR）With scalariform impedance half-wave resonator（SHR）Combination and improvement, mainly by the different circle of two diameters（11,12）Constitute.It is its compact conformation, easy to process, and good band-pass behavior can be produced.The Double Circle multimode resonator of the utility model design produces four transmission poles in passband, two transmission zeros are produced at upper and lower cut-off frequency, the passband relative bandwidth that it is produced realizes precipitous walled belt and high-frequency selectivity up to more than 55%.
Two band resistance parts point（20,21）Design：The utility model constitutes band resistance part point using the π types structure of asymmetric, and stopband can be widened by being applied to input/output section.It is by the unequal micro-strip counterfoil of two segment length that the π types band resistance part of wherein asymmetric, which is divided to,（L1, L2）Constitute, the structure can produce two transmission zeros by stopband portion on high frequency, so as to reach the effect for suppressing harmonic effect, widening stopband.Two of the broadband band-pass filter are common driving sources with resistance part point connection（50Ω）.
In order to reduce the volume of wave filter, microstrip line is folded up.This design not only make it that the structure of wave filter is more compact, and communication can be more realized well.The wave filter of this practical design can not only realize more than 55% relative bandwidth, and with higher frequency selectivity and good stopband characteristic, while logical in-band insertion loss is relatively low, simple in construction, small volume, is printed on the two sides of medium substrate, is easy to batch production, debugging, and it is with low cost.
Claims (4)
1. a kind of microstrip broadband wave filter based on Double Circle multimode resonator, it is characterised in that including being formed at dielectric-slab（40）The metal micro-strip paster on upper and lower surface（30）And metal ground plate（50）, the metal micro-strip paster include Double Circle multimode resonator（10）, two band resistance parts point（20,21）.
2. a kind of microstrip broadband wave filter based on Double Circle multimode resonator according to claim 1, it is characterised in that Double Circle multimode resonator（10）With two band resistance parts point（20,21）Intercoupled with Coupled Miccrostrip Lines.
3. a kind of microstrip broadband wave filter based on Double Circle multimode resonator according to claim 1, it is characterised in that Double Circle multimode resonator（10）Mainly by the different circle of two diameters（11,12）Constitute.
4. a kind of microstrip broadband wave filter based on Double Circle multimode resonator according to claim 1, it is characterised in that two band resistance parts point（20,21）Input/output section is applied to using asymmetric π types structure, it is by the unequal microstrip line counterfoil of two segment length that the π types band resistance part of asymmetric, which is divided to,（L1, L2）Constitute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220662872 CN203056053U (en) | 2012-12-05 | 2012-12-05 | Microstrip broad band filter based on double circular multi-mode resonator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220662872 CN203056053U (en) | 2012-12-05 | 2012-12-05 | Microstrip broad band filter based on double circular multi-mode resonator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203056053U true CN203056053U (en) | 2013-07-10 |
Family
ID=48738975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220662872 Expired - Fee Related CN203056053U (en) | 2012-12-05 | 2012-12-05 | Microstrip broad band filter based on double circular multi-mode resonator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203056053U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105489979A (en) * | 2014-09-20 | 2016-04-13 | 南京理工大学 | Multimode resonator-based tri-bandpass filter |
-
2012
- 2012-12-05 CN CN 201220662872 patent/CN203056053U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105489979A (en) * | 2014-09-20 | 2016-04-13 | 南京理工大学 | Multimode resonator-based tri-bandpass filter |
| CN105489979B (en) * | 2014-09-20 | 2018-07-31 | 南京理工大学 | Three band-pass filters based on multimode resonator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202930515U (en) | Rectangular ring multi-mode resonator-based microstrip wide-band filter | |
| WO2019104901A1 (en) | Negative zero-point coupling structure of dielectric waveguide filter | |
| CN203056053U (en) | Microstrip broad band filter based on double circular multi-mode resonator | |
| CN202930516U (en) | Rectangular fractal multi-mode resonator-based microstrip wide-band filter | |
| CN101465458B (en) | Miniaturisation high-performance microstrip bimodule band-pass filter | |
| CN202930517U (en) | Dual-rectangular ring multi-mode resonator-based microstrip wide-band filter | |
| CN105789758A (en) | Circular multi-mode resonator based microstrip wide-band filter | |
| CN105789756A (en) | Dual-rectangular fractal multi-mode resonator based microstrip wide-band filter | |
| CN204333192U (en) | A kind of high-performance microstrip filter based on two annulus multimode resonator | |
| CN204538166U (en) | A kind of microstrip broadband filter based on circular multimode resonator | |
| CN203180021U (en) | Microstrip broad band filter based on four-mode annular resonator | |
| CN106910970B (en) | Cavity four-mode filter | |
| CN105789759A (en) | Novel annular fractal resonator based microstrip wide-band filter | |
| CN105789760A (en) | Novel rectangular fractal multi-mode resonator based microstrip wide-band filter | |
| CN105762453A (en) | Double round ring multi-mode resonator based high performance micro-strip filter | |
| CN203690456U (en) | Switchable band-pass filter based on circular chip resonator provided with cross-shaped groove in etched manner | |
| CN103855450A (en) | Microstrip broadband filter based on four-mode ring resonator | |
| CN105789766A (en) | Stepped impedance resonator based ultra-wide bandwidth filter with trapped wave adjustability | |
| CN203760602U (en) | Switchable microstrip band pass filter of circular patch resonator based on etching pentagon notch | |
| CN204333183U (en) | Based on the compact bimodulus Wide stop bands filter of E type resonator and T-shaped feeder line | |
| CN105789750A (en) | E type resonator and T type feeder line based dual-mode dual-band narrow-band filter | |
| CN204333182U (en) | Based on the double-mode double-band narrow band filter of E type resonator and T-shaped feeder line | |
| CN204333184U (en) | Based on the compact bimodulus microstrip filter of E type resonator and T-shaped feeder line | |
| CN203760605U (en) | Microstrip-switchable band-pass filter with novel structure | |
| CN204333185U (en) | Based on the compact double-mode double-band microstrip filter of E type resonator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130710 Termination date: 20131205 |