CN103972623A - Waveguide filter based on electromagnetically induced transparency - Google Patents
Waveguide filter based on electromagnetically induced transparency Download PDFInfo
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Abstract
The invention discloses a waveguide filter based on electromagnetically induced transparency. The waveguide filter comprises an upper cavity, a lower cavity, a medium substrate, a signal input port and a signal output port, wherein the upper cavity and the lower cavity form a standard rectangular waveguide, and the medium substrate is inserted into the portion between the upper cavity and the lower cavity of the standard rectangular waveguide. A rectangular metal ring, an out-of-band rejection sheet, two rows of metallized through holes and a grounding epitaxial band are arranged in a metal micro-strip structure on the front face of the medium substrate, and two symmetric C-shaped resonance structures and a grounding epitaxial band are arranged on a metal micro-strip structure on the back face of the medium substrate. The rectangular metal ring located on the front side of the medium substrate and the two symmetric C-shaped resonance structures located on the back face of the medium substrate interact to generate a passing band of an electrically induced transparent window and a passing band of a magnetically induced transparent window, namely, the electromagnetically induced transparency effect is formed, upper sidebands and lower sidebands of the passing bands of the waveguide filter obtained through the effect are respectively provided with a transmission zero, high selectivity is achieved, and the waveguide filter is compact in structure and easy to design.
Description
Technical field
The present invention relates to microwave and millimeter wave design of filter technology, relate in particular to a kind of new method of waveguide type filter design.
Background technology
Waveguide filter is because the advantages such as its loss is little, and power capacity is large are widely used in a lot of microwaves, millimeter-wave systems.There is the multiple technology that realizes, for example direct coupled cavities, disappearance mould waveguide filter, multimode waveguide filter and E ground roll waveguide filter etc.Wherein direct coupled cavities method for designing, although flexible design, and squareness factor is good, and loss is little, and its processing is more complicated, and cost is high, is difficult for producing in enormous quantities.And the processing of E ground roll waveguide filter is simple, cost is low, be applicable to production in enormous quantities, design more flexible, but traditional E ground roll waveguide filter must carry out multistagely two in order to obtain good performance of filter, and what this cannot be avoided causes the overall dimensions of filter larger.Certainly researchers have also done necessary improvement research, wherein there is the insertion of the two diaphragms of E face (to see F.Arndt, J.Bornemann, R.Vahldieck, et al.E-plane IntegratedCircuit Filters with Improved Stopband Attenuation (short Papers) [J] .Microwave Theory and Techniques, IEEE Transactionson, 1984,32 (10), although 1391-1394.) improved the stopband characteristic of its filter, but this its still needs to carry out multi-stage cascade, and volume is still relatively large.In addition, although domestic progress falls behind relatively, but still have some recent studies on achievements, Wu Wei great waves in 2009, Liang Changhong, Zhai Botao and Wen Haibin (are shown in Wu Weitao to the E face filter of loading cycle ridge waveguide, Liang Changhong, Zhai Botao, Deng. the E face filter [C] of loading cycle ridge waveguide, national microwave and millimeter wave meeting in 2009, 2009, 51-52.) be studied, this filter is based on E facial mask sheet waveguide filter, a kind of filter implementation with high selectivity has been proposed, the waveguide and the ridge waveguide that are inserted with E facial mask sheet are combined, in the middle of the half-wave resonator of E face diaphragm filter, embed periodic ridge waveguide structure.This E ground roll waveguide filter has overcome the shortcoming of conventional filter, has the little feature of E ground roll waveguide filter that attenuation outside a channel is fast, size is more traditional, and we also see and in its design process, have inevitably carried out multi-stage cascade certainly.
In the design of E ground roll waveguide filter, cause volume to increase thereby inevitably need to carry out multi-stage cascade, be therefore necessary to study and design a kind of novel waveguide filter, make it adopt less physical dimension to realize good filtering performance.
And electromagnetic induced transparency EIT (Electromagnetically induced transparency) effect is an important research point of quantum aspect, it is very narrow that the signal that transmission medium produces because of electromagnetic induced transparency performance characteristic conventionally can transmit passband.The present quantum of a lot of application table based on EIT effect is learned field.In recent years, there is scholar's research can adopt lumped circuit element, the structure that the non-quantum such as split ring resonator is learned realizes EIT effect and (sees Guo Xiaoying, Yang Jing, Li Jian, Deng the experimental study [J] of class electromagnetic induced transparency phenomenon in .RLC circuit. University Of Shanxi's journal (natural science edition), 2012 (1): 68-74.)。
Because EIT effect can produce the characteristic of a transparent passband, therefore can imagine and adopt this electromagnetic induced transparency EIT effect can design band pass filter.Therefore, the present invention will adopt a kind of novel E ground roll waveguide filter of EIT effect design, and it has high squareness factor, and loss is little, compact conformation, the advantages such as flexible design.This being effectively applied in the design of millimeter wave frequency band waveguide filter in electromagnetic induced transparency (EIT) effect in this quantum field, to enrich design of filter theory, increase new theory, by for the device designs such as filter provide certain theoretical foundation, there is theory and practice directive significance.
Summary of the invention
In order to improve the performance of E ground roll waveguide filter, in existing research and design, all carry out multi-stage cascade, unavoidably cause the relatively large defect of volume, therefore be necessary to invent a kind of novel E ground roll waveguide filter, make it overcome the demand to cascade, adopt less physical dimension to realize good filtering performance.
To achieve these goals, technical scheme of the present invention is:
Based on a waveguide filter for electromagnetic induced transparency, comprise form standard rectangular waveguide upper cavity (1), lower chamber, be inserted into medium substrate, signal input port and signal output port between standard rectangular waveguide upper cavity and lower chamber; The metal micro-strip structure in described medium substrate front has rectangular metal ring, Out-of-band rejection sheet, two row's plated-through hole and ground connection extension bands, and the metal micro-strip structure at the medium substrate back side has two symmetrical C shape resonance structures and ground connection extension band;
By regulating the physical dimension of rectangular metal ring and two symmetrical C shape resonance structures, make its two passband windows that produce strong interaction and then generate electric induction transparency window and magnetic induction transparency window in a certain frequency band, form electromagnetic induced transparency effect; The waveguide filter that utilizes this effect to realize, the upper lower sideband of its passband respectively has a transmission zero.Its specific design is, the size of appropriate design rectangular metal ring and two symmetrical C shape resonance structures, make the position of two passbands that regulate electric induction transparency window and magnetic induction transparency window, two transparent passbands are approached also overlapping, thereby form the band-pass filtering property with premium properties, realize the waveguide filter based on EIT concept, because electromagnetic induced transparency window is produced by electric resonance and magnetic resonance, therefore respectively introduce a transmission zero at the upper lower sideband of the transparent passband of filter, effectively raised the squareness factor of waveguide filter;
Signal input port and output port are directly made up of standard rectangular waveguide, and signal does not need to be directly applied in the metal micro-strip structure of medium substrate positive and negative by input port through any metal micro-strip structural transition, is then exported by output port; Two symmetrical C shape resonance structures at the medium substrate back side, the brachium up and down of its C type can start to change from 0mm, thereby can regulate flexibly and design the position of the transparent passband of electric induction and the transparent passband of magnetic induction;
The Out-of-band rejection sheet with certain Out-of-band rejection effect in medium substrate front is directly connected with the wave guide wall up and down of waveguide via substrate extension band, and its width value can be 0mm; Be positioned at the ground connection extension band of medium substrate reverse side and the ground connection extension band structure in medium substrate front is measure-alike, and be connected by two row's plated-through holes.In design, should note, when the duty ratio of rectangular metal ring hour can appropriate design Out-of-band rejection sheet, can improve the stopband rejection of the waveguide filter of its this electromagnetic induced transparency, and in the time that the duty ratio of rectangular metal ring is larger, this structure will be very little, the performance of its improvement is limited, therefore can remove this structure for simplicity of design, is also that width has become 0.
The present invention has adopted has low-loss standard metal rectangular waveguide, by upper and lower cavity with form, insert medium substrate at its E face, the rectangular metal ring structure in medium substrate front produces an eigen mode that is claimed low Q mould, this pattern is produced by the coupling effect of rectangular metal ring and outside input field, produce stronger absorption, standard rectangular waveguide can in produce a wider stopband, on identical resonance frequency, when the height of rectangular metal ring is larger, quality factor are lower, therefore in the utility model design, should select the quality factor of stopband lower for well.The rectangular metal ring of two symmetrical C shape resonance structure binding medium substrate front side at the medium substrate back side interacts, electric resonance and magnetic resonance in the situation that having input field, are produced, they are the corresponding transparent passband of electric induction and the transparent passband of magnetic induction with higher quality factor respectively, it is electromagnetic induced transparency effect, in addition, because the essence of electromagnetic induced transparency passband is the effect of electromagnetic resonance, therefore according to the theory of electromagnetic resonance, just have in the lower sideband of the transparent passband of electric induction and the each characteristic that occurs a zero point of the upper sideband of the transparent passband of magnetic induction, these two waveguide filters that zero point design had to high squareness factor have very important impact.Appropriate design rectangular metal ring and two symmetrical C shape resonance structures, wherein the value of the L of two upper and lower brachiums of symmetrical C shape resonance structure can be since 0 variation, and we just can obtain the logical EIT waveguide filter of satisfactory band.In addition in design, we will pay special attention to, make the transparent passband of electric induction be positioned at the lower sideband of the transparent passband of magnetic induction, and adjustment structure size, can make electromagnetic induced transparency passband that two scripts separate approach and one of overlapping one-tenth has more wide band electromagnetic induced transparency passband.Finally, there is the Out-of-band rejection sheet of certain Out-of-band rejection effect, can flexible Application in design, hour can appropriate design Out-of-band rejection sheet when the duty ratio of rectangular metal ring, can improve the stopband rejection of the waveguide filter of its this electromagnetic induced transparency, and in the time that the duty ratio of rectangular metal ring is larger, this structure will be very little, the performance of its improvement is limited, therefore can remove this structure for simplicity of design, is also that width has become 0.
Advantage of the present invention and beneficial effect:
(1) the present invention adopts the waveguide filter design of electromagnetic induced transparency (EIT) conceptual design, has the premium properties such as high squareness factor, miniaturization.
(2) the present invention adopts straight-flanked ring, Out-of-band rejection sheet metal and two symmetrical C shape resonance structures, and it is simple in structure, and flexible design is convenient, and is easy to design.
(3) the Out-of-band rejection sheet being directly connected with wave guide wall that the present invention adopts has certain Out-of-band rejection optimization function, and flexible design.
(4) with respect to traditional waveguide filter method for designing, the present invention adopts new design concept, and EIT effect, successfully for the design of waveguide filter, is realized to the waveguide filter of function admirable.
Brief description of the drawings
Below in conjunction with the drawings and the specific embodiments, the present invention is described in further detail.
Fig. 1 is the structure three-dimensional schematic diagram based on electromagnetic induced transparency waveguide filter provided by the invention.
Fig. 2 is the substrate front side structural representation of the waveguide filter based on electromagnetic induced transparency provided by the invention.
Fig. 3 is the substrate back structural representation of the waveguide filter based on electromagnetic induced transparency provided by the invention.
Fig. 4 is emulation and the test result comparison diagram of the waveguide filter example based on electromagnetic induced transparency provided by the invention.
Embodiment
As shown in Figure 1, Figure 2, Figure 3 shows, based on a waveguide filter for electromagnetic induced transparency, comprise form standard rectangular waveguide upper cavity 1, lower chamber 2, be inserted into medium substrate 3, signal input port 4 and signal output port 5 between standard rectangular waveguide upper cavity 1 and lower chamber 2; The metal micro-strip structure in described medium substrate 3 fronts has rectangular metal ring 31, Out-of-band rejection sheet 32, two row's plated-through hole 33 and ground connection extension bands 34, and the metal micro-strip structure at medium substrate 3 back sides has two symmetrical C shape resonance structures 35 and ground connection extension band 36;
The rectangular metal ring 31 in medium substrate 3 fronts interacts and produces two passbands of electric resonance transparency windows and magnetic resonance transparency window with two that are positioned at medium substrate 3 back sides symmetrical C shape resonance structures 35, thereby forms electromagnetic induced transparency effect; The waveguide filter that utilizes this effect to realize, the upper lower sideband of its passband respectively has a transmission zero;
By regulating the physical dimension of rectangular metal ring 31 and two symmetrical C shape resonance structures 35, make its two passband windows that produce strong interaction and then generate electric induction transparency window and magnetic induction transparency window in a certain frequency band, form electromagnetic induced transparency effect; The waveguide filter that utilizes this effect to realize, the upper lower sideband of its passband respectively has a transmission zero.
Signal input port 4 and output port 5 are directly made up of standard rectangular waveguide, and signal does not need to be directly applied in the metal micro-strip structure of medium substrate 3 positive and negatives by input port 4 through any metal micro-strip structural transition, is then exported by output port 5; Two symmetrical C shape resonance structures 35 at medium substrate 3 back sides, the brachium up and down of its C type can start to change from 0mm;
The Out-of-band rejection sheet 32 with certain Out-of-band rejection effect in medium substrate 3 fronts is directly connected with the wave guide wall up and down of waveguide via substrate extension band 34, and its width value can be 0mm; Be positioned at the ground connection extension band 36 of medium substrate 3 reverse side identical with ground connection extension band 34 physical dimensions in medium substrate 3 fronts, and be connected by two row's plated-through holes 33.
As an example, a kind of waveguide filter based on electromagnetic induced transparency is designed, processes, tests.Standard rectangular waveguide is the WR-28 (7.112mm*3.556mm) that works in Ka wave band, the medium substrate of selecting in design of Simulation is that its dielectric constant of Rogers RT/duroid5880 is 2.2, thickness 0.254mm, loss angle tangent is 0.0009, wherein the circuit structure size on medium substrate is respectively, the height of rectangular metal ring 31 is 3mm, width is 2mm, the height of the symmetrical C shape resonance structure 35 of substrate back is 3mm, and the outward flange spacing of symmetrical C shape resonance structure 35 is 2mm, the width of the value of L and Out-of-band rejection sheet is 0mm, the width of all metal bands is 0.2mm.Test result shows, adopts the novel waveguide filter of electromagnetic induced transparency (EIT) effect design, has higher squareness factor, loss is low, and Out-of-band rejection is good, and processing cost is low, be easy to produce in enormous quantities, and in this, waveguide filter flexible design is convenient.In addition, error in emulation and actual measurement is not mainly to be a constant of invariable 2.2 at Ka wave band due to the substrate dielectric constant that adopts in experiment, and its value is actual is less than 2.2, in addition due to machining accuracy, the factors such as practical operation, have caused test result frequency to high frequency offset.
Claims (4)
1. the waveguide filter based on electromagnetic induced transparency, comprise form standard rectangular waveguide upper cavity (1), lower chamber (2), be inserted into medium substrate (3), signal input port (4) and signal output port (5) between standard rectangular waveguide upper cavity (1) and lower chamber (2); It is characterized in that: the positive metal micro-strip structure of described medium substrate (3) has rectangular metal ring (31), Out-of-band rejection sheet (32), two row's plated-through hole (33) and ground connection extension bands (34), and the metal micro-strip structure at medium substrate (3) back side has two symmetrical C shape resonance structures (35) and ground connection extension band (36).
2. a kind of waveguide filter based on electromagnetic induced transparency of discussing according to claim 1, it is characterized in that: by regulating the physical dimension of rectangular metal ring (31) and two symmetrical C shape resonance structures (35), make its two passband windows that produce strong interaction and then generate electric induction transparency window and magnetic induction transparency window in a certain frequency band, form electromagnetic induced transparency effect; The waveguide filter that utilizes this effect to realize, the upper lower sideband of its passband respectively has a transmission zero.
3. a kind of waveguide filter based on electromagnetic induced transparency of discussing according to claim 1, it is characterized in that: described signal input port (4) and output port (5) are directly made up of standard rectangular waveguide, signal does not need to be directly applied in the metal micro-strip structure of medium substrate (3) positive and negative by input port (4) through any metal micro-strip structural transition, is then exported by output port (5); Two symmetrical C shape resonance structures (35) at medium substrate (3) back side, the brachium up and down of its C type can start to change from 0mm.
4. a kind of waveguide filter based on electromagnetic induced transparency of discussing according to claim 1, it is characterized in that: be positioned at the positive Out-of-band rejection sheet (32) with certain Out-of-band rejection effect of medium substrate (3) and be directly connected with the wave guide wall up and down of waveguide via substrate extension band (34), its width value can be 0mm; The ground connection extension band (36) that is positioned at medium substrate (3) reverse side is identical with ground connection extension band (34) physical dimension in medium substrate (3) front, and is connected by two row's plated-through holes (33).
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| CN104269587A (en) * | 2014-09-30 | 2015-01-07 | 电子科技大学 | Small-sized waveguide duplexer |
| CN106803612A (en) * | 2017-03-18 | 2017-06-06 | 电子科技大学 | A kind of group delay modulator transparent based on electromagnetically induced |
| CN108123194A (en) * | 2016-11-30 | 2018-06-05 | 凯镭思通讯设备（上海）有限公司 | A kind of thin-walled stretches cavity body filter and production method |
| CN109196712A (en) * | 2016-03-18 | 2019-01-11 | 牛津大学科技创新有限公司 | magnetic induction waveguide |
| CN109638393A (en) * | 2018-12-20 | 2019-04-16 | 安徽华东光电技术研究所有限公司 | A kind of miniaturization W-waveband filter |
| CN113131109A (en) * | 2021-04-17 | 2021-07-16 | 中国人民解放军国防科技大学 | W-band E-surface waveguide dual-passband filter |
| CN113131110A (en) * | 2021-04-17 | 2021-07-16 | 中国人民解放军国防科技大学 | W-band E-plane waveguide filter |
| CN113948837A (en) * | 2021-09-28 | 2022-01-18 | 西安交通大学 | W-band E-plane waveguide bandpass filter |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104269587A (en) * | 2014-09-30 | 2015-01-07 | 电子科技大学 | Small-sized waveguide duplexer |
| US10931252B2 (en) | 2016-03-18 | 2021-02-23 | Oxford University Innovation Ltd. | Magnetoinductive waveguide |
| CN109196712A (en) * | 2016-03-18 | 2019-01-11 | 牛津大学科技创新有限公司 | magnetic induction waveguide |
| WO2018098940A1 (en) * | 2016-11-30 | 2018-06-07 | 凯镭思通讯设备（上海）有限公司 | Thin-wall stretching cavity filter and manufacturing method thereof |
| CN108123194A (en) * | 2016-11-30 | 2018-06-05 | 凯镭思通讯设备（上海）有限公司 | A kind of thin-walled stretches cavity body filter and production method |
| CN106803612A (en) * | 2017-03-18 | 2017-06-06 | 电子科技大学 | A kind of group delay modulator transparent based on electromagnetically induced |
| CN106803612B (en) * | 2017-03-18 | 2022-03-04 | 电子科技大学 | Group delay regulator based on electromagnetic induction transparency |
| CN109638393A (en) * | 2018-12-20 | 2019-04-16 | 安徽华东光电技术研究所有限公司 | A kind of miniaturization W-waveband filter |
| CN113131109A (en) * | 2021-04-17 | 2021-07-16 | 中国人民解放军国防科技大学 | W-band E-surface waveguide dual-passband filter |
| CN113131110A (en) * | 2021-04-17 | 2021-07-16 | 中国人民解放军国防科技大学 | W-band E-plane waveguide filter |
| CN113131110B (en) * | 2021-04-17 | 2021-11-23 | 中国人民解放军国防科技大学 | W-band E-plane waveguide filter |
| CN113131109B (en) * | 2021-04-17 | 2022-01-04 | 中国人民解放军国防科技大学 | W-band E-surface waveguide dual-passband filter |
| CN113948837A (en) * | 2021-09-28 | 2022-01-18 | 西安交通大学 | W-band E-plane waveguide bandpass filter |
| US11682817B1 (en) | 2021-09-28 | 2023-06-20 | Xi'an Jiaotong University | W-band E-plane waveguide bandpass filter |
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