CN102496760A - Waveguide bridge of trapezoid impedance conversion broadband - Google Patents
Waveguide bridge of trapezoid impedance conversion broadband Download PDFInfo
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- CN102496760A CN102496760A CN2011104498686A CN201110449868A CN102496760A CN 102496760 A CN102496760 A CN 102496760A CN 2011104498686 A CN2011104498686 A CN 2011104498686A CN 201110449868 A CN201110449868 A CN 201110449868A CN 102496760 A CN102496760 A CN 102496760A
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Abstract
The invention discloses a waveguide bridge of a trapezoid impedance conversion broadband. A stepped propulsion structure of an H surface of a waveguide wall is converted into an inclined plane; that is, a finite number of steps are piled into a continuous inclined plane. According to the invention, advantages are as follows: the waveguide bridge has a wide frequency band and low loss.
Description
Technical field
The present invention relates to the electric bridge in a kind of microwave communication, specially refer to the rectangular waveguide in the trapezoidal impedance conversion of a kind of H face broadband.
Background technology
In millimere-wave band, because low-loss own, applying frequency are high, receive most scientific research personnel's favor recently based on the power division/comprise network of waveguide bridge.With respect to defectives that the loss of microstrip type power splitter is excessive, isolation is too little such as Wilkinsons, the part occasion utilizes waveguide bridge to replace becomes certainty.Adopt 3dB waveguide E face branched structure for binary system power division Wave guide unit structure, this Waveguide branching structure has the exclusive characteristics of compact conformation more.But because the influence of the cutter head corner of machining has been led certain limitation to the E ground roll.
In power synthetic technique, utilize the short groove effect that the TE30 mould fades away in a public domain of narrow wall, can cause the change of the electrical length of parity mode circuit like this, thereby realize broadband character.Common structure is impelled electromagnetic wave for the structure that the ladder propelling is set at outer wall and in the shunting of slit, is accomplished impedance conversion, reasonable distribution electromagnetic wave efficient.So can be easy to generate discontinuity in the edges and corners transmission of crossing over ladder, form the discontinuous transmission of phase place, follow-up output is produced comparatively seriously influence, in addition the number of ladder and highly also affecting passband width at electromagnetic wave.
Summary of the invention
Technical problem to be solved by this invention is the trapezoidal impedance conversion broadband waveguide electric bridge that a kind of bandwidth will be provided.
In order to solve above technical problem, the invention provides a kind of trapezoidal impedance conversion broadband waveguide electric bridge, the ladder push structure with wave guide wall H face is transformed into the inclined-plane, is about to limited ladder and is piled into successional inclined-plane.
Advantage of the present invention is that bandwidth, loss are low.
Description of drawings
Fig. 1 is the trapezoidal impedance conversion waveguide bridge of a H face sketch map;
Fig. 2 is 1/4th profiles of Fig. 1;
Fig. 3 and Fig. 4 are frequency band and damage curve figure after the emulation.
Embodiment
See also shown in the accompanying drawing, the present invention is done further description.
The invention provides a kind of trapezoidal impedance conversion broadband waveguide electric bridge, the ladder push structure with wave guide wall H face is transformed into the inclined-plane, is about to limited ladder and is piled into successional inclined-plane.
The present invention adopts and to change step conversion into inclined-plane, is about to limited ladder and piles up and be shaped as successional inclined-plane form, satisfies electromagnetic level and smooth impedance conversion, and the non-continuous event that reduces in the bandwidth produces.This model is to get through the analysis of H face discontinuity multimode equivalent-circuit model.
Example shown in Figure 1 is a waveguide bridge that the H face is trapezoidal, and the structure of electric bridge mainly is with in the structural trapezoidal variation of H face, and to the excitation of main mould TE10 mould, magnetic field is to move ahead along the H face is parallel.Analyze this structure for ease, electric bridge is divided into the single port excitation in zones such as four along AA ' and BB '.Parity mode excitation according to the plane is divided along plane of symmetry AA ' and BB ' with electric field and magnetic field boundaries, as illustrates 2, and wherein the tread structure is to have a unlimited small-sized trapezium structure to pile up to form.In this case, the collision matrix unit can pass through the reflection coefficient of four ports:
Wherein, subscript e and o represent the strange mould and the even mould of the plane of symmetry respectively.
As shown in Figure 2, in 1/4th profiles, electric field or the magnetic field A, B, the C that section are divided into three waveguides constitute.Three multi-mode pilot stage joint conferences produce the discontinuity of ladder.Wherein trapezoidal faces B can be regarded as 1 ... N is waited high not wide rectangle to form; Through altitude conversion step by step; Realize the impedance transition mechanism in the coupling regime; Thereby can in tunable frequency, realize lower return loss, the degree of unbalance of amplitude also makes moderate progress, simulation result such as Fig. 3 and shown in Figure 4.
Claims (1)
1. trapezoidal impedance conversion broadband waveguide electric bridge is characterized in that: the ladder push structure with wave guide wall H face, be transformed into the inclined-plane, and be about to limited ladder and be piled into successional inclined-plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104498686A CN102496760A (en) | 2011-12-29 | 2011-12-29 | Waveguide bridge of trapezoid impedance conversion broadband |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104498686A CN102496760A (en) | 2011-12-29 | 2011-12-29 | Waveguide bridge of trapezoid impedance conversion broadband |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102496760A true CN102496760A (en) | 2012-06-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104498686A Pending CN102496760A (en) | 2011-12-29 | 2011-12-29 | Waveguide bridge of trapezoid impedance conversion broadband |
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| CN (1) | CN102496760A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112448112A (en) * | 2020-11-06 | 2021-03-05 | 西安伊艾姆科技有限公司 | Broadband 3dB electric bridge with ridge rectangular waveguide |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87102309A (en) * | 1986-03-27 | 1987-12-09 | 休斯航空公司 | Wide-band short slot hybrid coupler |
| US7973616B2 (en) * | 2008-06-05 | 2011-07-05 | Kabushiki Kaisha Toshiba | Post-wall waveguide based short slot directional coupler, butler matrix using the same and automotive radar antenna |
-
2011
- 2011-12-29 CN CN2011104498686A patent/CN102496760A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87102309A (en) * | 1986-03-27 | 1987-12-09 | 休斯航空公司 | Wide-band short slot hybrid coupler |
| US7973616B2 (en) * | 2008-06-05 | 2011-07-05 | Kabushiki Kaisha Toshiba | Post-wall waveguide based short slot directional coupler, butler matrix using the same and automotive radar antenna |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112448112A (en) * | 2020-11-06 | 2021-03-05 | 西安伊艾姆科技有限公司 | Broadband 3dB electric bridge with ridge rectangular waveguide |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120613 |