CN110488117A - Circular waveguide TE in a kind of inspection " flower-petal " mode converter01The method of mode purity - Google Patents
Circular waveguide TE in a kind of inspection " flower-petal " mode converter01The method of mode purity Download PDFInfo
- Publication number
- CN110488117A CN110488117A CN201910721888.0A CN201910721888A CN110488117A CN 110488117 A CN110488117 A CN 110488117A CN 201910721888 A CN201910721888 A CN 201910721888A CN 110488117 A CN110488117 A CN 110488117A
- Authority
- CN
- China
- Prior art keywords
- mode
- circular waveguide
- petal
- flower
- foil
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/16—Auxiliary devices for mode selection, e.g. mode suppression or mode promotion; for mode conversion
- H01P1/163—Auxiliary devices for mode selection, e.g. mode suppression or mode promotion; for mode conversion specifically adapted for selection or promotion of the TE01 circular-electric mode
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
- Waveguide Switches, Polarizers, And Phase Shifters (AREA)
Abstract
The present invention provides TE in a kind of inspection " flower-petal " mode converter circular waveguide01The method of mode purity.The present invention utilizes TE01The characteristics of mould electric field is along the circumferential direction and without radial electric field obtains the scattering parameter before and after filtering parasitic mode, TE can quickly be calculated by the way that foil is radially added in circular waveguide01Mode purity.This method is simply easily implemented, and TE can be quickly examined01The purity of mould；In the power conversion efficiency experiment of measurement pattern converter, this method is of great significance for the reliability of confirmatory experiment data；This method is of great significance for the quality of judgement " flower-petal " mode converter performance and the Optimized Improvement Design of instructional model converter structure.
Description
Technical field
The invention belongs to microwave technical fields, and in particular to circle wave in a kind of inspection " flower-petal " mode converter
Lead TE01The method of mode purity.
Background technique
Switched energy storage pulse compression technique is a kind of Microwave pulse method that can obtain high power gain, wherein storing up
The natural quality factor Q of energy resonant cavity0It plays a decisive role to system power gain.Due to circular waveguide TE01Mould power loss compared with
It is small, it works in TE01nThe cylinder energy-storing chamber of mould has very high quality factor, has been used for switched energy storage pulse compression dress
In setting.And the output mode of high-power klystron is rectangular waveguide TE under normal conditions10Mould, therefore, rectangular waveguide TE10Circle wave
Lead TE01Mode converter becomes essential critical device.
" flower-petal " mode converter has the advantages that size is small, compact-sized and power capacity is higher, and by
For in switched energy storage compression device.The structural schematic diagram of " flower-petal " mode converter as shown in Figure 1, its
Main operational principle is to be inserted into a wedge in rectangular waveguide H face midline position first, by the TE of input10Mould power equal part is to two
In a rectangular waveguide with identical cross-section, then by opening four coupling slots and circular waveguide realization coupling in two faces rectangular waveguide H
It closes, since the positions and dimensions selection of coupling slot meets circular waveguide TE01The soaking condition of mould, rectangular waveguide TE10Mould will be efficient
Ground is converted into circular waveguide TE01Mould.
In the rectangular waveguide TE of measurement " flower-petal " mode converter10Circular waveguide TE01Mould power conversion efficiency
When, the test method of " back-to-back " is generallyd use, i.e., the circular waveguide end of two mode converters is docked, a mode converter
Rectangular waveguide end as input terminal, the rectangular waveguide end of another mode converter passes through two docking of measurement as output end
The S parameter of mode converter, then calculate the S parameter of single mode converter.The TE measured in this way01Mould conversion effect
The reliability of rate is with circular waveguide TE01Mode purity is close to premised on 1.However there is presently no for judging " flower-
Circular waveguide TE in petal " mode converter01The method of mode purity often assumes that TE in circular waveguide in experiment01Mould power is remote
Much larger than other modes.And in fact, this hypothesis is not rigorous enough, because of the electrical property of " flower-petal " mode converter
Opposite joint size and short road surface position are more sensitive, and the error in the quality and actual processing of structural symmetry will be in circular waveguide
It has motivated except TE01Other modes other than mould, Effect Mode purity.In the prior art there is not yet relevant detection method and detection
Means can quickly obtain TE in circular waveguide01The purity of mould, there is an urgent need for a kind of methods can quickly detect " flower-
Circular waveguide TE in petal " mode converter01Mode purity, to promote the reliability and instructional model converter knot of experimental data
The Optimized Improvement Design of structure.
Summary of the invention
The invention aims to solve to examine TE in " flower-petal " mode converter circular waveguide01The mode of mould is pure
The technical issues of spending.
In order to solve the above-mentioned technical problems, the present invention provides a kind of inspection " flower-petal " mode converter circle waves
Lead middle TE01The method of mode purity, technical solution are as follows:
Step 1: choosing two works in same frequency point and preferable " flower-petal " mode converter of similitude；
Step 2: the circular waveguide flange of two " flower-petal " mode converters is docked, then by two rectangular waves
Port is led respectively as input and output port, the mode converter after being docked using vector network analyzer measurement is dissipated
Penetrate parameter；
Step 3: the radially even placement n piece foil (3≤n≤7) in circular waveguide, foil should with couple
The distance for being no less than half of waveguide wavelength is kept between seam, and utilizes the fixed foil of foamed plastic；
Further, foil can choose 5；
Further, the foamed material can choose polyurethane foam plastics；
Step 4: measurement pattern converter adds the scattering parameters entered after foil；
Step 5: the modulus value size of comparison step 1 and the resulting scattering parameters of step 4, can examine to obtain circular waveguide
Middle TE01The mode purity of mould.
Beneficial effects of the present invention
(1) the invention proposes one kind for examining TE in " flower-petal " mode converter circular waveguide01Mode is pure
The method of degree, this method are simply easily implemented, and TE can be quickly examined01The purity of mould；
(2) in the power conversion efficiency experiment of measurement pattern converter, this method is reliable for confirmatory experiment data
Property is of great significance；
(3) quality and instructional model converter knot of this method for judgement " flower-petal " mode converter performance
The Optimized Improvement Design of structure is of great significance.
Detailed description of the invention
Fig. 1 is the flow chart of realization process of the present invention
Fig. 2 is " flower-petal " mode converter three-dimensional view；
Fig. 3 is TE in circular waveguide after addition foil01Mould field distribution.
Wherein, 1- rectangular waveguide mounting flange, 2- rectangular waveguide, 3- wedge, 4- coupling slot, 5- circular waveguide, 6- circular waveguide
Mounting flange
Specific embodiment
Specific embodiments of the present invention will be described in further detail with reference to the accompanying drawing.
Realization process of the invention is as shown in Fig. 1.It is illustrated below according to the process, it is detailed to illustrate realization of the invention
Process.
Attached drawing 2 is the three-dimensional view of " flower-petal " mode converter used in the present invention, and structure is existing
Technology, details are not described herein again.Based on the working characteristics of " flower-petal " mode converter, circular waveguide section therein can be
Guarantee TE in bandwidth01Mould is in spread state, TM21Mould is in off state.In this case, 10 can be propagated in circular waveguide
Kind mode, they are TE respectively11、TM01、TE21、TE01、TM11、TE31And TE11、TE21、TM11、TE31Their polarization, wherein
TM01、TE01Mode is angularly symmetrical, and there is no polarization degenerate modes.Selection two works in same frequency point and similitude is preferable
" flower-petal " mode converter.
Divide by the circular waveguide flange docking of two " flower-petal " mode converters, then by two rectangular waveguide ports
Not Zuo Wei input and output port, the scattering parameters of the mode converter after being docked using vector network analyzer measurement.
Utilize TE in circular waveguide01The characteristics of electric field of mould is along the circumferential direction and without radial electric field, the radially even placement n in circular waveguide
Piece foil (3≤n≤7).Here the quantity of suitable sheet metal is selected, when foil quantity is very few, parasitic mode decaying
It measures small, it is difficult to filter out；When quantity is excessive, to TE01The influence of mould can become larger.The present invention, can for placing 5 sheet metals
Obtain preferable experiment effect.TE in circular waveguide is illustrated in figure 3 after 5 foils are added01Mould field distribution.Foil
It should keep preventing foil larger to the coupling process generation of coupling slot at a distance from no less than half wavelength between coupling slot
It influences.Since conductor is perpendicular to power line, the addition of foil is to circular waveguide TE01The transmission of mould influences very small；And
Transmission mode that may be present for other in circular waveguide, because there is the radial electric field component parallel with sheet metal conductor in it,
It will cause induced current in the conductor, the addition of radial foil can make these modes generate greater attenuation.
Utilize foamed plastic (such as polyurethane foam plastics) fixed foil.Due to the dielectric constant of this kind of foamed plastic
Close to 1, and very little is lost, it is believed that its addition is on microwave transmission without influence.
By the circular waveguide flange docking of two mode converters, after obtaining docking using vector network analyzer measurement again
Mode converter scattering parameters.
The modulus value size of scattering parameters before and after foil is added by comparison, can quickly examine to obtain in circular waveguide
TE01The mode purity of mould.
A specific embodiment of the invention is given below:
Two are chosen first and works in 2.856GHz and preferable " flower-petal " mode converter of similitude, by two
The circular waveguide flange of a " flower-petal " mode converter docks, then using two rectangular waveguide ports as input and
Output port, the scattering parameters S of the mode converter after being docked using vector network analyzer measurement21。
Polyurethane foam plastics is placed in the circular waveguide of two mode converters, dielectric constant is lost close to 1
Very little can ignore its influence to microwave transmission.In polyurethane foam plastics along circular waveguide it is radially uniform fix it is 5 thin
Sheet metal, foil prevent foil from producing bigger effect to the coupling process of coupling slot apart from 5~6cm of coupling slot.It will
The circular waveguide flange docking of two mode converters, the mode conversion after being docked again using vector network analyzer measurement
The scattering parameters S of device21′。
The two groups of collision matrix parameter S measured before and after foil are placed in comparison21With S21' size, can according to formula (1)
TE in the circular waveguide of " flower-petal " mode converter is obtained with approximate calculation01Mode accounting:
As can be seen from the above embodiments, the method proposed in the present invention utilizes TE in circular waveguide01Mould electric field is circumferentially square
The characteristics of Xiang Erwu radial electric field, is calculated by obtaining scattering parameters of the circular waveguide before and after being positioned radially foil respectively
TE in the circular waveguide of " flower-petal " mode converter is obtained01The mode purity of mould；This method is simply easily implemented, can
Rapid evaluation mode purity.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and deformations can also be made, these improvement and deformations
Also it should be regarded as protection scope of the present invention.
Claims (3)
1. circular waveguide TE in a kind of inspection " flower-petal " mode converter01The method of mode purity, it is characterised in that such as
Lower step:
Step 1: choosing two works in same frequency point and preferable " flower-petal " mode converter of similitude；
Step 2: the circular waveguide flange of two " flower-petal " mode converters is docked, then by two rectangular waveguide ends
Mouth respectively as input and output port, joined by the scattering of the mode converter after being docked using vector network analyzer measurement
Amount；
Step 3: the radially even placement n piece foil (3≤n≤7) in circular waveguide, foil should with coupling slot it
Between keep the distance for being no less than half of waveguide wavelength, and utilize the fixed foil of foamed plastic；
Step 4: measurement pattern converter adds the scattering parameters entered after foil；
Step 5: the modulus value size of comparison step 1 and the resulting scattering parameters of step 4, can examine to obtain TE in circular waveguide01
The mode purity of mould.
2. circular waveguide TE in a kind of inspection " flower-petal " mode converter according to claim 101Mode purity
Method, which is characterized in that the foil can choose 5.
3. circular waveguide TE in a kind of inspection " flower-petal " mode converter according to claim 1 or 201Mode is pure
The method of degree, which is characterized in that the foamed material can choose polyurethane foam plastics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910721888.0A CN110488117B (en) | 2019-08-06 | 2019-08-06 | Inspection of circular waveguide TE in 'power-target' mode converter01Method of mode purity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910721888.0A CN110488117B (en) | 2019-08-06 | 2019-08-06 | Inspection of circular waveguide TE in 'power-target' mode converter01Method of mode purity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110488117A true CN110488117A (en) | 2019-11-22 |
| CN110488117B CN110488117B (en) | 2021-08-13 |
Family
ID=68549993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910721888.0A Active CN110488117B (en) | 2019-08-06 | 2019-08-06 | Inspection of circular waveguide TE in 'power-target' mode converter01Method of mode purity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110488117B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113740708A (en) * | 2021-08-27 | 2021-12-03 | 西安交通大学 | Circular waveguide TE11 and TM01 hybrid mode diagnosis method based on eight-hole coupler |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200723586A (en) * | 2005-12-12 | 2007-06-16 | Univ Nat Tsing Hua | High order mode electromagnetic wave coupler of proportionally allocated bypassing device and the coupling method thereof |
| CN204391227U (en) * | 2014-11-24 | 2015-06-10 | 中国航空工业集团公司雷华电子技术研究所 | A kind of K-band rectangle TE10-circular waveguide TE01 mode transition structure of practicality |
| CN105322265A (en) * | 2015-11-17 | 2016-02-10 | 电子科技大学 | Fan-shaped waveguide-based power distributor/synthesizer |
| CN105322266A (en) * | 2015-11-17 | 2016-02-10 | 电子科技大学 | Circular waveguide higher mode TM01 based radial waveguide power synthesis/distributor |
| CN107240738A (en) * | 2017-06-14 | 2017-10-10 | 电子科技大学 | A kind of follow-on millimeter wave TE10 TE01 wave mode conversion methods |
| CN206961985U (en) * | 2017-04-19 | 2018-02-02 | 桂林电子科技大学 | A kind of Ka wave bands circular waveguide TE01 mode exciters |
-
2019
- 2019-08-06 CN CN201910721888.0A patent/CN110488117B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200723586A (en) * | 2005-12-12 | 2007-06-16 | Univ Nat Tsing Hua | High order mode electromagnetic wave coupler of proportionally allocated bypassing device and the coupling method thereof |
| CN204391227U (en) * | 2014-11-24 | 2015-06-10 | 中国航空工业集团公司雷华电子技术研究所 | A kind of K-band rectangle TE10-circular waveguide TE01 mode transition structure of practicality |
| CN105322265A (en) * | 2015-11-17 | 2016-02-10 | 电子科技大学 | Fan-shaped waveguide-based power distributor/synthesizer |
| CN105322266A (en) * | 2015-11-17 | 2016-02-10 | 电子科技大学 | Circular waveguide higher mode TM01 based radial waveguide power synthesis/distributor |
| CN206961985U (en) * | 2017-04-19 | 2018-02-02 | 桂林电子科技大学 | A kind of Ka wave bands circular waveguide TE01 mode exciters |
| CN107240738A (en) * | 2017-06-14 | 2017-10-10 | 电子科技大学 | A kind of follow-on millimeter wave TE10 TE01 wave mode conversion methods |
Non-Patent Citations (2)
| Title |
|---|
| QING-XIN CHU 等: "An Isolated Radial Power Divider via Circular Waveguide TE01-Mode Transducer", 《IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES》 * |
| 杨卫红 等: "大功率射频板条CO2激光器电极波导介质膜研究", 《中国激光》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113740708A (en) * | 2021-08-27 | 2021-12-03 | 西安交通大学 | Circular waveguide TE11 and TM01 hybrid mode diagnosis method based on eight-hole coupler |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110488117B (en) | 2021-08-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107896412B (en) | It is a kind of for measuring the high frequency magnetic probe diagnostic system of radio frequency wave property | |
| CN110488117A (en) | Circular waveguide TE in a kind of inspection " flower-petal " mode converter01The method of mode purity | |
| CN109061319B (en) | Electromagnetic parameter measuring method based on rectangular resonant cavity | |
| CN103344170A (en) | High voltage transmission conductor sag measuring device and method | |
| CN109687087A (en) | A kind of accurate efficient Terahertz branch-waveguide directional coupler modeling method | |
| Liao et al. | Design of a TE 01-mode waveguide bend based on an elliptical waveguide structure | |
| CN110133367B (en) | Load for millimeter wave calorimetric microwave power meter | |
| Holloway et al. | Measuring the shielding effectiveness of small enclosures/cavities with a reverberation chamber | |
| Hantista et al. | High-power RF pulse compression with SLED-II at SLAC | |
| Ma | Understanding reverberating chambers as an alternative facility for EMC testing | |
| CN105937924A (en) | Intelligent geological monitoring base station | |
| Mitra et al. | Power transfer characteristics of a microwave reverberation chamber | |
| CN111146554A (en) | Bidirectional signal directional cavity coupler | |
| Mosnier et al. | Design of a heavily damped superconducting cavity for SOLEIL | |
| Monteverde et al. | Source stirring technique for reverberation chambers; experimental investigation | |
| Tantawi et al. | The Next Linear Collider Test Accelerator’s RF Pulse Compression and Transmission Systems | |
| Neshati et al. | Rectangular dielectric resonator antennas: theoretical modelling and experiments | |
| Uhm | Electromagnetic-wave propagation in a conducting waveguide loaded with a tape helix | |
| CN110502792A (en) | A kind of method and device for realizing wireless power transfer based on metal grate cavity configuration | |
| McDonald | Radiation from the open end of a coaxial cable | |
| CN220479324U (en) | Piezoelectric ceramic piece and ultrasonic water meter transducer | |
| Obina et al. | Damped button electrode for B-factory BPM system | |
| Gardner et al. | An experimental and analytical study of the use of bounds to estimate the coupling to a monopole inside a cavity with an aperture | |
| Hoffswell et al. | Higher modes in the coupling cells of coaxial and annular-ring coupled linac structures | |
| Aponte | DML Resonance & Directional Coupler Sims |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |