CN203503764U - Compact multimode microstrip filter - Google Patents
Compact multimode microstrip filter Download PDFInfo
- Publication number
- CN203503764U CN203503764U CN201320549754.3U CN201320549754U CN203503764U CN 203503764 U CN203503764 U CN 203503764U CN 201320549754 U CN201320549754 U CN 201320549754U CN 203503764 U CN203503764 U CN 203503764U
- Authority
- CN
- China
- Prior art keywords
- metal surface
- filter
- microstrip filter
- load
- compact multimode
- 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 provides a compact multimode microstrip filter. The compact multimode microstrip filter comprises a filter plate formed by combination of a metal surface layer, a dielectric layer and a metal bottom layer, and the metal surface layer is provided with an input and output port, source end and load loading detail transmission lines, parallel coupling transmission lines, and parallel transmission connecting lines. The compact multimode microstrip filter is small, exquisite and handy in design, and has the characteristics of having a stop band with a high resistance level, having good filtering effects, and being small in energy dissipation.
Description
Technical field
The utility model relates to a kind of network filter, specifically a kind of compact multimode microstrip filter.
Background technology
Filter, as a kind of two-port network, has specific frequency selective characteristic, and the frequency signal that allowing needs passes through smoothly and other frequency signals decay are suppressed, and is widely used at present the fields such as radar, broadcast, radio communication, TT&C system.The quality of performance of filter directly affects whole microwave system, often needs to use the filter with high-band outside inhibitory energy in reality.By certain frequency place outside band, introduce attenuation pole, transmission zero, can bring precipitous Out-of-band rejection for filter.Cancelling out each other of two-way or multiple signals is the physical cause that transmission zero produces.
Multi-mode filter is one of technological approaches of filter miniaturization.In a chamber, can exist several resonance frequencys to equate or very approaching pattern, each pattern is equivalent to a resonant tank, these Mode Coupling are coupled together, just form multi-mode filter, this filter is more compact compared with single mode filter, has wide application prospect.At present, in microstrip filter, utilize a kind of micro-strip double-module resonant element, by add perturbation on the plane of symmetry, realize two orthogonal modes couplings.
Utilize traditional cross-couplings technology to produce zero point, all need additionally to introduce coupled structure or resonant cavity, the lengthy and tedious complexity that filter construction is become.And multi-mode filter all unavoidably need to add the coupled structure of perturbation technique and perturbation, increased the difficulty of processing technology.
Summary of the invention
The purpose of this utility model is to provide a kind of compact multimode microstrip filter, has the good and little feature that consumes energy of stopband inhibition.
The utility model comprises the filter band being combined into one by metal surface and dielectric layer and metal back layer, the technical scheme adopting is: the filter band being combined by metal surface and dielectric layer and metal back layer is provided with input/output port, source and load and loads minor matters transmission line, parallel coupling transmission line, parallel transmission connecting line on its metal surface.
In technique scheme: set input/output port and source and load load minor matters transmission line and be respectively two, are combined as respectively "T"-shaped structure, and a minute both sides correspondence is unanimously arranged on metal surface.
Set parallel coupling transmission line is two, is disposed on the centre that two sources and load load minor matters transmission line, and between two parallel coupling transmission lines, interval arranges parallel transmission connecting line.
The utility model passes through technique scheme, owing to having adopted the setting of above-mentioned a kind of like this general structure, formed resonant element has formed a resonant element with three modes of resonance, during use, by corresponding construction parameter, as input source and load end loaded transmission line length, the adjustment of the length of the length of parallel coupling transmission line and spacing and the line of rabbet joint etc., can realize the adjustment of resonance frequency and the outer limited transmission zero location of band, and can realize the number of the outer limited transmission zero of band more than the number of mode of resonance, compared with prior art, improved greatly the outer resistance level of band, there is return loss low, harmonic wave resists effective distinguishing feature.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Fig. 1 is the utility model structural representation.
Fig. 2 is the utility model frequency characteristic curve diagram.
In figure: 1, metal surface, 2, dielectric layer, 3, metal back layer, 4, input/output port, 5, source and load load minor matters transmission line, 6, parallel coupling transmission line, 7, parallel transmission connecting line.
Embodiment
Shown in Fig. 1,2: the filter band being combined by metal surface 1 and dielectric layer 2 and metal back layer 3 is provided with input/output port 4, source and load and loads minor matters transmission line 5, parallel coupling transmission line 6, parallel transmission connecting line 7 on its metal surface 1.Set input/output port 4 and source and load load minor matters transmission line 5 and are respectively two, are combined as respectively "T"-shaped structure, and a minute both sides correspondence is unanimously arranged on metal surface 1.Set parallel coupling transmission line 6 is two, is disposed on the centre that two sources and load load minor matters transmission line 5, and between two parallel coupling transmission lines 6, interval arranges parallel transmission connecting line 7.
Shown in Fig. 2: what show in figure is the S parameter of design of Simulation and actual measurement, both coincide good.From the S11 curve of actual measurement, find out, more than the return loss of passband reaches 20dB, illustrate that in passband, filter has been realized good matching properties.From the S21 curve of actual measurement, find out, more than stopband inhibition level reaches 20dB, and can observe significantly and in stopband, have 4 limited transmission zeros, quantitatively more than 3 modes of resonance of filter.
The integral body that the metal surface 1 that the utility model relates to and dielectric layer 2 and metal back layer 3 form is used printed circuit board (PCB).
Claims (3)
1. a compact multimode microstrip filter, comprise the filter band being combined into one by metal surface (1) and dielectric layer (2) and metal back layer (3), it is characterized in that: the filter band being combined by metal surface (1) and dielectric layer (2) and metal back layer (3) is provided with input/output port (4), source and load and loads minor matters transmission lines (5), parallel coupling transmission line (6), parallel transmission connecting line (7) on its metal surface (1).
2. compact multimode microstrip filter according to claim 1, it is characterized in that: set input/output port (4) and source and load load minor matters transmission lines (5) and be respectively two, be combined as respectively "T"-shaped structure, a minute both sides correspondence is unanimously arranged on metal surface (1).
3. compact multimode microstrip filter according to claim 1, it is characterized in that: set parallel coupling transmission line (6) is two, be disposed on the centre that two sources and load load minor matters transmission lines (5), between two parallel coupling transmission lines (6), interval arranges parallel transmission connecting line (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320549754.3U CN203503764U (en) | 2014-01-03 | 2014-01-03 | Compact multimode microstrip filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320549754.3U CN203503764U (en) | 2014-01-03 | 2014-01-03 | Compact multimode microstrip filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203503764U true CN203503764U (en) | 2014-03-26 |
Family
ID=50334713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320549754.3U Expired - Fee Related CN203503764U (en) | 2014-01-03 | 2014-01-03 | Compact multimode microstrip filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203503764U (en) |
-
2014
- 2014-01-03 CN CN201320549754.3U patent/CN203503764U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103367844A (en) | Multi-branch loading-based three passband high-temperature superconductive filter | |
| CN103825075A (en) | T-shaped branch loading built-in antenna combiner | |
| CN103367845A (en) | Ultra-wideband micro-strip balance filter | |
| CN104659450B (en) | A kind of broadband bandpass filter based on cross resonator | |
| CN103296346A (en) | Micro-strip balanced filter | |
| CN104022318A (en) | Multilayer two-mode two-passband balun filter having independent and controllable bandwidth and work frequency | |
| US20100117766A1 (en) | Capacitively loaded spurline filter | |
| Ojaroudi et al. | Very low profile ultrawideband microstrip band‐stop filter | |
| CN103311614B (en) | Dual-mode micro-band bandpass filter of crossed patch | |
| CN100495814C (en) | Any dual-frequency band 3dB branch directional coupler | |
| US10079588B2 (en) | Power dividing circuit and power divider | |
| CN109193087A (en) | A kind of novel four function filter-divider of high-performance dual-passband | |
| CN203644921U (en) | Gysel power dividing filter with high power dividing ratio | |
| CN106532201A (en) | Miniature wide stop band dual-mode balance band-pass filter based on annular resonator | |
| CN105811063B (en) | Power processing circuit, No. two amplifying circuits and multichannel amplifying circuit | |
| CN101702458A (en) | Ultra wide band filter with band-stop characteristic | |
| CN104282970A (en) | DBR filter and DBR duplexer | |
| CN103856271A (en) | Adjustable harmonic wave filtering device | |
| CN203503764U (en) | Compact multimode microstrip filter | |
| TW201537822A (en) | A power processing circuit and a multiplex amplified circuit | |
| US10097154B2 (en) | Power dividing circuit and power divider | |
| KR20160117041A (en) | UWB bandpass filter using stepped impedance short and open circuited stub | |
| CN104659447B (en) | Based on terminal short circuit from the narrowband differential bandpass filter of coupling ring shape resonator | |
| CN202364184U (en) | Balanced radio frequency electric adjustment band pass filter with constant absolute bandwidth | |
| CN103985928A (en) | Ultra wide band balance filter based on slotted line structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140326 Termination date: 20150103 |
|
| EXPY | Termination of patent right or utility model |