CN103151583A - Folding multimode slotted patch microstrip bandpass filter - Google Patents
Folding multimode slotted patch microstrip bandpass filter Download PDFInfo
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- CN103151583A CN103151583A CN2013100964553A CN201310096455A CN103151583A CN 103151583 A CN103151583 A CN 103151583A CN 2013100964553 A CN2013100964553 A CN 2013100964553A CN 201310096455 A CN201310096455 A CN 201310096455A CN 103151583 A CN103151583 A CN 103151583A
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- bandpass filter
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- microstrip bandpass
- fluting
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Abstract
The invention relates to a folding multimode slotted patch microstrip bandpass filter. The multimode slotted patch microstrip bandpass filter is characterized in that the filter comprises a rectangular patch (1), wherein the rectangular patch (1) is rectangular; a rectangular slot (2) is formed in each of the upper side and the lower side of the rectangular patch (1); symmetric clearance coupling arms (3) are arranged on an input end and an output end of the rectangular patch (1); and a feeder line (4) spacing from the rectangular patch (1) at a certain distance is arranged on each clearance coupling arm (3). The folding multimode slotted patch microstrip bandpass filter provided by the invention refers to that the existing rectangular patch microstrip bandpass filter is slotted; the relative bandwidth of the microstrip bandpass filter reaches 70%, while the relative bandwidth of the common bandwidth microstrip bandpass filter is below 20%; and the performance and the size of the folding multimode slotted patch microstrip bandpass filter are more excellent than the performance and the size of the bandpass filters in other shapes.
Description
Technical field
The present invention relates to a kind of filter, particularly a kind of simple in structure, be convenient to process, easy to operate rectangle fluting paster multimode microstrip bandpass filter.
Background technology
From the course of Telecommunication Development, filter is being played the part of important role always in microwave circuit, is to use more passive device, and is accompanied by the development of the communication technology and obtains continuous progress.From the angle of practicality, to all hand-held electronic equipments, as portable mobile phone etc., microminiaturization is an important research topic.In radio frequency part, although the appearance of monolithic integrated microwave circuit (MMIC) is indicating that the microminiaturization of radio frequency active circuit such as amplifier, modulator, frequency converter more and more becomes possibility.But also there are many problems to be solveds in the optimization aspect that radio-frequency filter and oscillator etc. contains that the size of the circuit of resonator dwindles.Therefore, the raising of the miniaturization of filter and performance is two large important topics with continuing.The several method that the microwave filter miniaturization is adopted usually: 1, adopt high dielectric constant material to reduce the size of filter.2, adopt slow wave structure design microstrip filter.3, adopt multilayer technique to reduce the volume of filter.4, adopt multimode resonator designing filter etc.
Micro-strip resonantor is easy to other microwave circuit integrated, is the focus of developing at present microwave device.Multimode resonator is microwave band-pass filter miniaturization one of the most effective means, mainly comprises waveguide dual-mode resonator, medium dual-mode resonator and micro-strip double-module resonator.Micro-strip resonantor commonly used can be the forms such as circular, square, annular or broken line.
From existing document, little band multimode (comprising bimodulus) resonator after deliberation mainly contains: circular, square, annular, side's annular, fold-line-shaped ring, triangle etc.
Summary of the invention
For the problems referred to above, main purpose of the present invention is to provide a kind of rectangular patch multimode microstrip bandpass filter that adds fluting that existing folding rectangular filter is changed to.
The present invention solves above-mentioned technical problem by following technical proposals: a kind of paster multimode microstrip bandpass filter of rectangle half-wavelength fluting, described filter comprises: rectangle half-wavelength fluting paster (1), the high impedance line of two 1/4 wavelength is drawn on one side of rectangle fluting paster, and filter adopts slot-coupled with feeder line.
In specific embodiments of the invention, described rectangle fluting patch filter and feeder line are Copper Foil.
Positive progressive effect of the present invention is: rectangle fluting paster multimode microstrip bandpass filter provided by the invention is changed to existing rectangle on rectangular filter slots, the relative bandwidth of this microstrip bandpass filter has reached 70%, the relative bandwidth of general wideband microband band pass filter is less than 20%, and its performance and size are better than the band pass filter of other profiles.
Description of drawings
Fig. 1 is the geometry schematic diagram of rectangle fluting paster multimode microstrip bandpass filter provided by the invention.
Embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.
Fig. 1 is the geometry schematic diagram of rectangle fluting paster multimode microstrip bandpass filter provided by the invention.This filter comprises: rectangular patch, have the rectangle sulculus on the both sides of rectangular patch, and respectively draw the high impedance line of 1/4 wavelength on the both sides of rectangular patch one end, this high impedance line links feeder line by slot-coupled again.
The present invention proposes a kind of brand-new microstrip bandpass filter topological structure, adopt Maxwell equation to prove this topological structure, for actual conditions, owing to being difficult to maybe can't to prove theoretically with Maxwell equation, can only adopt numerical method to prove, on academic and engineering, the normal method that adopts is to utilize the high-frequency electromagnetic simulation software of commercialization to carry out Electromagnetic Simulation to prove, optimize.
Commercial high-frequency electromagnetic simulation software has multiple, and what I adopted is that HFSS is optimized the topological structure that proposes.Again the structure of optimizing is made sample, to sample test, confirm this filter topology with the method for testing.
Distance between two feeder line centers is 5.2mm; The long 14.8mm of rectangular patch; Wide is 5.8mm; Two groove widths opening on rectangular patch are 1.2mm; Long 4mm; The high impedance line of 1/4 wavelength, long 9mm are respectively drawn in the both sides of rectangular patch one end; Wide is 0.4mm; It is 2.65 that all pasters and feeder line are dielectric coefficient, and substrate thickness is the Copper Foil of 1mm, and feeder line is the wide 2.8mm of being of 50 Ω feeder lines.
The bimodulus characteristic is that at first Wolff finds when early 1970s is used for the designing and making band pass filter.For different field distribution, infinite a plurality of mode of resonance and resonance frequency are arranged in resonator, the pattern that wherein has identical resonance frequency is called degenerate mode.If in single resonator by adding some perturbations (such as fluting, corner cut or add little paster, interior corner cut etc.), can change the Electric Field Distribution of former quadrature degenerate mode, make between the pair of orthogonal degenerate mode and be coupled, the effect of two coupling degenerate modes is equivalent to two coupled resonatorses, thereby in the situation that keep resonant tank constant, make the number of resonator reduce half.Can control stiffness of coupling by the size that changes these perturbations.The multimode microstrip bandpass filter is less than dual-mode microstrip band-pass filter.
From existing document, micro-strip double-module resonator (filter) after deliberation mainly comprises: circular, square, annular, side's annular, fold-line-shaped, triangle etc.
The present invention is a kind of novel rectangle fluting paster multimode microstrip bandpass filter, is different from the profile (circular, square, annular, just annular, fold-line-shaped, triangle etc.) of existing document multimode microstrip bandpass filter on the profile (topological structure) of filter.Microstrip bandpass filter of the present invention, its performance is better than the band pass filter of other profiles.
For different field distribution, infinite a plurality of mode of resonance and resonance frequency are arranged in resonator, the pattern that wherein has identical resonance frequency is called degenerate mode.If in single resonator by adding some perturbations (such as fluting, corner cut or add little paster, interior corner cut etc.), can change the Electric Field Distribution of former quadrature degenerate mode, make between the pair of orthogonal degenerate mode and be coupled, the effect of two coupling degenerate modes is equivalent to two coupled resonatorses, thereby in the situation that keep resonant tank constant, make the number of resonator reduce half.Can control stiffness of coupling by the size that changes these perturbations.
What the foreign scholar proposed at first is the rectangular patch resonator, and we slot on patch resonator and produce passband, due to the existence of fluting, have extended the path of the electric current between feeder line, have reached the purpose of filter miniaturization.
Above demonstration and description be basic principle of the present invention, principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; that describes in above-described embodiment and specification just illustrates principle of the present invention; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (8)
1. folding multimode fluting paster microstrip bandpass filter, it is characterized in that: described filter comprises: rectangular patch (1), described rectangular patch (1) is rectangle, have rectangular channel (2) on the both sides up and down of rectangular patch (1), symmetrical slot-coupled arm (3) is arranged on the input/output terminal of folding rectangular patch (1), be provided with the feeder line (4) separated by a distance with rectangular patch (1) on slot-coupled arm (3).
2. folding multimode fluting paster microstrip bandpass filter according to claim 1, it is characterized in that: described rectangular channel is with respect to point symmetry in rectangular patch.
3. folding multimode fluting paster microstrip bandpass filter according to claim 2, it is characterized in that: described rectangular channel length is 4mm, width is 1.2mm, and is vertical with horizontal direction.
4. folding multimode fluting paster microstrip bandpass filter according to claim 3, it is characterized in that: the distance between rectangular channel is 6mm.
5. folding multimode fluting paster microstrip bandpass filter according to claim 1, it is characterized in that: described rectangular patch and feeder line are Copper Foil.
6. folding multimode fluting paster microstrip bandpass filter according to claim 5, it is characterized in that: the dielectric constant of rectangular patch and feeder line is 2.65, substrate thickness is 1mm.
7. folding multimode fluting paster microstrip bandpass filter according to claim 1, is characterized in that: the feeding classification of described feeder line employing slot-coupled.
8. according to claim 1 or 7 described folding multimodes fluting paster microstrip bandpass filters, it is characterized in that: the gap of described slot-coupled arm and rectangular patch input/output terminal is 0.2mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013100964553A CN103151583A (en) | 2013-03-22 | 2013-03-22 | Folding multimode slotted patch microstrip bandpass filter |
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| CN2013100964553A CN103151583A (en) | 2013-03-22 | 2013-03-22 | Folding multimode slotted patch microstrip bandpass filter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103700909A (en) * | 2013-12-26 | 2014-04-02 | 上海海事大学 | Novel folding multimode resonator structure-based UWB (ultra-wideband) filter |
| CN104934664A (en) * | 2015-07-06 | 2015-09-23 | 电子科技大学 | A high-selectivity submillimeter wave ultra wide band filter based on a vehicle-mounted radar system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7437187B1 (en) * | 2000-10-30 | 2008-10-14 | Conductus, Inc. | Superconductive filter with capacitive patches providing reduced cross-coupling |
| CN102593559A (en) * | 2012-04-09 | 2012-07-18 | 上海海事大学 | T-shaped micro-strip dual-mode band-pass filter |
-
2013
- 2013-03-22 CN CN2013100964553A patent/CN103151583A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7437187B1 (en) * | 2000-10-30 | 2008-10-14 | Conductus, Inc. | Superconductive filter with capacitive patches providing reduced cross-coupling |
| CN102593559A (en) * | 2012-04-09 | 2012-07-18 | 上海海事大学 | T-shaped micro-strip dual-mode band-pass filter |
Non-Patent Citations (1)
| Title |
|---|
| 陈雷: "微带天线小型化和多频技术的研究", 《万方学位论文》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103700909A (en) * | 2013-12-26 | 2014-04-02 | 上海海事大学 | Novel folding multimode resonator structure-based UWB (ultra-wideband) filter |
| CN103700909B (en) * | 2013-12-26 | 2016-08-17 | 上海海事大学 | A kind of based on Novel ultra wide band (UWB) wave filter folding multimode resonator structure |
| CN104934664A (en) * | 2015-07-06 | 2015-09-23 | 电子科技大学 | A high-selectivity submillimeter wave ultra wide band filter based on a vehicle-mounted radar system |
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Application publication date: 20130612 |