CN108011160B - K-waveband miniaturized orthogonal mode converter - Google Patents
K-waveband miniaturized orthogonal mode converter Download PDFInfo
- Publication number
- CN108011160B CN108011160B CN201711004887.1A CN201711004887A CN108011160B CN 108011160 B CN108011160 B CN 108011160B CN 201711004887 A CN201711004887 A CN 201711004887A CN 108011160 B CN108011160 B CN 108011160B
- Authority
- CN
- China
- Prior art keywords
- waveguide
- output interface
- output
- converter
- common
- 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.)
- Active
Links
Images
Classifications
-
- 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
- H01P1/161—Auxiliary devices for mode selection, e.g. mode suppression or mode promotion; for mode conversion sustaining two independent orthogonal modes, e.g. orthomode transducer
Landscapes
- Waveguide Switches, Polarizers, And Phase Shifters (AREA)
Abstract
The invention belongs to the technical field of satellite communication, and discloses a K-band miniaturized orthogonal mode converter, which comprises: the device comprises an input interface, a first output interface and a second output interface. The input interface adopts a gradual change type common waveguide, and the output interface is directly coupled to two sides of the common waveguide through a rectangular waveguide to realize the good matching of each port and the ideal separation effect of input signals. The invention has simple structure and easy production, the standing-wave ratio of the ports in the frequency band of 21-24GHz is less than 1.2, and the isolation parameter of the two orthogonal ports is less than-45 dB. The mode converter is different from other mode converters and has the characteristics of good mode separation transmission performance, simple structure, small size and convenience in processing and engineering application.
Description
Technical Field
The invention belongs to the technical field of satellite communication, and particularly relates to a K-band miniaturized orthogonal mode converter.
Background
A quadrature-mode converter, also called a dual-mode transformer. The orthogonal mode converter is generally used for realizing independent work of two orthogonal polarization signals in an antenna feed network at the front end of a radio electronic equipment system, and can distinguish the modes of the two independent signals on a common port, transmit the two independent signals to two independent ports respectively and realize single-mode output of the two ports. The orthogonal mode converter can match all ports, and plays an important role in solving frequency reuse as an important component in a dual-polarized antenna. In order to ensure good mode transmission performance of each output port and simple structure of a device, the existing orthogonal mode coupler has two output ports which are usually two standard rectangular waveguide ports which are perpendicular to each other, and the transmission mode of the orthogonal mode coupler is controlled by adjusting the size of the standard rectangular waveguide of the output port. In order to design an orthomode converter meeting the requirements of engineering specifications, the physical size of the device is usually large, which is not favorable for practical application and engineering implementation. If the problem of the OMT in the technology is solved, the application range of the OMT is wider, so that frequency reuse is really realized, and the use efficiency of a channel is improved.
In summary, the problems of the prior art are as follows: two mutually vertical output ports of the conventional orthogonal mode converter are still connected to two parallel rectangular waveguide ports of a duplexer finally, and a plurality of transition waveguides and bent waveguides are required to be added in the middle of the conventional orthogonal mode converter, so that the design complexity is greatly increased; too many transition waveguides bring more loss, influence system performance index, are more unfavorable for system integration.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a K-band miniaturized orthogonal mode converter and radio electronic equipment.
The invention is realized in such a way that a K-band miniaturized orthogonal mode converter is provided with:
an input interface employing a tapered common waveguide;
a common waveguide is used to couple the two output interfaces of the side rectangular waveguides.
Further, the input interface is a phi 4.5mm non-standard circular waveguide.
Further, the first output interface and the second output interface are both non-standard rectangular waveguides with the thickness of 10.67mm multiplied by 4.32mm, and strict electrical symmetry inhibits transmission of high-order modes in the two output interfaces.
Furthermore, the input interface is a circular waveguide, rectangular cutting is carried out on the opposite side of the waveguide wall branch, and a gradual change type common waveguide is formed by different cutting depths, so that good matching and return loss characteristics of the input end are ensured.
Furthermore, the output interface is directly coupled with the rectangular waveguide through the common waveguide wall, and the rectangular waveguide is coupled at the middle section of the common waveguide, so that the OMT structure is greatly simplified, and the OMT is convenient to design and engineering application.
Furthermore, the horizontal polarization signal is output by the good matching effect of the output port through the transition from the rectangular waveguides with different sizes to the first output interface; coupling a rectangular waveguide at the bottom of the common waveguide, wherein the direction of the rectangular waveguide is opposite to the direction of the first output port branch; and transitioning to a second output interface through several different sizes to output the vertically polarized signal.
Furthermore, a coupling groove is formed in the coupling position of the common waveguide and the side rectangular waveguide, so that good matching and return loss characteristics of the output port are guaranteed.
It is another object of the present invention to provide a radio electronic device using the K-band miniaturized orthogonal mode converter.
The input interface of the invention inputs a group of orthogonal polarization signals, which are transmitted by the circular common waveguide, and the field distribution in the circular common waveguide can be expressed as:
Hz＝AsinφJ1(kcρ)e-jβz
Ez＝0
the side branch waveguide in the middle of the circular common waveguide enables horizontally polarized waves to enter the branch waveguide for propagation through the design of the size of a coupling position, and the horizontally polarized waves are reflected for multiple times through a plurality of rectangular waveguides and finally output at a port; after the vertically polarized wave propagates to the bottom of the circular waveguide, the propagation direction is changed, the vertically polarized wave is transmitted from the direction opposite to the first output interface, and finally the vertically polarized wave is output at the port through multiple reflections of several rectangular waveguides. The output ports are connected by rectangular waveguides with different sizes, polarization signals are output, and the two output interfaces of the orthogonal mode converter can be guaranteed to have a good matching effect.
According to the invention, the coupling groove is designed at the branch waveguide coupled with the common waveguide, so that the function of an impedance converter which is omitted in the design of the orthogonal mode converter for simplifying the structure and reducing the size is compensated, and the coupling groove is mainly used for impedance conversion, so that the ideal return loss characteristic of each port is realized.
The invention realizes the good return loss characteristic of each output port; the impedance transformation is carried out by adopting the design of a coupling groove, so that each port has an ideal matching effect; the transmission of a higher order mode is inhibited by the completely electrically symmetrical design of the two output interfaces; moreover, a rectangular waveguide port for orthogonal mode output is designed for a single circular waveguide orthogonal mode converter, so that a good polarization separation effect of signals is realized; the two designed branch ports are realized in a mode of direct coupling of the side edges of the common waveguide, so that the structure of the orthogonal mode converter is simplified, the size is reduced, and the mode separation and transmission performance of the converter is better.
Compared with the working characteristics of other OMTs, most of the existing OMTs contain a large number of transition waveguides to meet the output characteristics and matching effects of each port, and the OMT only contains two transition waveguides and three transition waveguides, so that the good matching effect of the output ports is realized, and the device structure is simplified; on the connecting part, most of the existing OMTs are designed with special impedance converters to realize the characteristics of output ports, the general structures are relatively complex and are not beneficial to actual processing, and the OMT realizes the function of the impedance converter by using a coupling groove, so that the OMT has a simple structure and is easy to process; because the common OMT has a complex structure, the physical size is not particularly small generally, the application range is limited, and the OMT has a small size, is easy to process and is convenient for engineering application. In summary, the OMT described herein has the outstanding advantages of simple structure, small size, good isolation characteristics for transmission and reflection, and easy processing and application.
Drawings
Fig. 1 is a schematic structural diagram of a K-band miniaturized orthomode converter provided in an embodiment of the present invention;
fig. 2 is a schematic bottom view of a K-band miniaturized orthomode converter according to an embodiment of the present invention;
FIG. 3 is a diagram of simulation results of parameters of a K-band miniaturized orthomode converter S (1: 1) according to an embodiment of the present invention;
FIG. 4 is a diagram of simulation results of parameters of a K-band miniaturized orthomode converter S (1: 2) according to an embodiment of the present invention;
FIG. 5 is a diagram of simulation results of parameters of a K-band miniaturized orthomode converter S (2: 1) according to an embodiment of the present invention;
FIG. 6 is a diagram of simulation results of parameters of a K-band miniaturized orthomode converter S (3: 1) according to an embodiment of the present invention;
FIG. 7 is a diagram of simulation results of parameters of a K-band miniaturized orthomode converter S (1:2,2:1) according to an embodiment of the present invention;
FIG. 8 is a diagram of simulation results of parameters of a K-band miniaturized orthomode converter S (1:1,3:1) according to an embodiment of the present invention;
fig. 9 is a diagram of simulation results of parameters of a K-band miniaturized orthomode converter S (1:1,1:2) according to an embodiment of the present invention;
FIG. 10 is a diagram of simulation results of parameters of a miniaturized K-band orthogonal-to-analog converter S (2:1,3:1) according to an embodiment of the present invention;
in the figure: 1. an input interface; 2. a first output interface; 3. a second output interface; 4. a coupling groove.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The orthogonal mode converter can match all ports, and plays an important role in solving frequency reuse as an important component in a dual-polarized antenna.
The following detailed description of the principles of the invention is provided in connection with the accompanying drawings.
As shown in fig. 1, a K-band miniaturized orthomode converter provided in an embodiment of the present invention includes: input interface 1, first output interface 2, second output interface 3.
The input interface 1 adopts a gradual change type common waveguide, the output interface is realized by coupling a side rectangular waveguide with the common waveguide, and the waveguide and the coupling groove ensure that the working performance of the whole orthogonal mode coupler is more excellent.
The application of the principles of the present invention will now be described in further detail with reference to specific embodiments.
Fig. 1 is a schematic structural diagram of a miniaturized orthomode converter operating in the K band according to an embodiment of the present invention, where the orthomode converter includes: an input interface 1, a first output interface 2 and a second output interface 3.
The input interface 1 is realized by a circular waveguide, rectangular cutting is carried out on the opposite side of the waveguide wall branch, gradually-changed common waveguides are formed by different cutting depths and are connected with the output ends on the two sides, and signals in a working frequency band are input.
The branches of the first output interface 2 and the second output interface 3 are realized by directly coupling rectangular waveguides on the wall of the common waveguide, wherein the branch of the first output interface 3 is coupled at the middle section of the circular common waveguide, and is transited to the first output interface 2 through several rectangular waveguides with different sizes to output horizontally polarized signals; the second output interface 3 is coupled to the bottom of the circular common waveguide in a branch manner, is coupled at the diameter of the common waveguide, has the opposite direction to the branch direction of the first output port 2, is transited to the second output interface 3 through a plurality of different sizes, and finally outputs a vertically polarized signal; the side surfaces of the rectangular waveguides branched by the first output interface 2 and the second output interface 3 are positioned on the same plane, and the two output interfaces have the same size and are non-standard rectangular waveguides, so that the electrical symmetry characteristic is formed, and the propagation of an unnecessary mode is inhibited.
The input interface 1 is a non-standard circular waveguide input port with phi of 4.5mm, and is an orthogonal polarization signal input port of an orthogonal mode converter; the first output interface 2 is a horizontal polarization signal output port of the orthogonal analog converter; the second output interface 3 is an orthogonal mode converter vertically polarized signal output port. The first output interface 2 and the second output interface 3 are directly coupled to two sides of the circular common waveguide respectively, so that orthogonal polarization signals can be orthogonally output at waveguide positions in the orthogonal mode converter respectively, and the polarization separation function of the orthogonal mode converter is realized.
At the direct coupling position of the common waveguide and the output port, a plurality of coupling grooves 4 are connected to replace an impedance converter in a common orthogonal mode converter, so that the function of impedance conversion is exerted, and the input and output ports have good matching and ideal return loss characteristics together with a plurality of transitional rectangular waveguides.
The application effect of the present invention will be described in detail with reference to the simulation.
Fig. 3 and 4 are graphs showing simulation results of parameters S (1: 1) and S (1: 2) in the example of the present invention, where S (1: 1) represents the reflection coefficient received in the vertical polarization mode, and S (1: 2) represents the reflection coefficient of the input interface 1 when the horizontal polarization signal is input. As can be seen from the figure, in the frequency range of 21-24GHz, both curves are below-22 dB, and the orthogonal mode converter has good return loss characteristics.
As shown in fig. 5 and fig. 6, which are graphs of simulation results of parameters S (2: 1) and S (3: 1) in the example of the present invention, which respectively represent the reflection coefficients of the first output interface 2 and the second output interface 3, it can be seen from the graphs that, in the frequency band range of 21-24GHz, both curves are below-22 dB, and also meet the return loss index requirement of the high performance orthomode converter;
fig. 7 and 8 show simulation results of parameters S (1:1,3:1) and S (1:2,2:1) in the example of the present invention, where S (1:2,2:1) represents the reverse transmission coefficient of the horizontal polarization mode from the first output interface 2 to the input interface 1, and S (1:1,3:1) represents the reverse transmission coefficient of the vertical polarization mode from the second output interface 3 to the input interface 1, and as can be seen from the parameter curves in the figure, both curves are around-0.2 dB in the frequency band of 21-24GHz, and it can be seen that the orthogonal mode coupler has good insertion loss characteristics in the operating frequency band.
Referring to fig. 9 and 10, which are graphs showing the simulation results of the isolation characteristics of the orthogonal mode converter in the example of the present invention, S (1:1,1:2) represents the ratio of the transmission power of one polarization mode in the channel to the power leaked into the other channel, i.e., represents the transmission isolation characteristics of two modes, which is less than-30 dB in the frequency band of 21-24GHz, and S (2:1,3:1) represents the isolation of two polarization channels, which is less than-45 dB in the operating frequency band, and generally, the isolation of-30 dB can substantially ensure the overall system performance.
The output interface of the invention adopts the transition of rectangular waveguides with different sizes, and a coupling slot is designed at the coupling position of the public port and the branch port for impedance transformation, so that each port of the orthogonal mode converter has good matching degree and ideal return loss, and the impedance matching of input and output is realized; rectangular waveguide ports for orthogonal mode output are designed for a single circular waveguide orthogonal mode converter, so that polarization separation of signals is realized; different from the traditional orthogonal mode converter with a complex structure, the mode that the branch waveguide is directly coupled to the side edge of the public waveguide is adopted to replace the impedance converter of the original orthogonal mode converter, so that the device has a simpler structure, is easy to produce and process, has a small size and a wider application range, and is directly coupled to two sides of the circular waveguide by adopting two output port branches, so that the mode separation transmission performance is better.
The output end of the invention adopts the rectangular waveguides with different sizes for transition, thus realizing the good return loss characteristic of each output port; the coupling slot design is adopted for impedance transformation, so that each port has an ideal matching effect; the transmission of a higher order mode is inhibited by the completely electrically symmetrical design of the two output interfaces; rectangular waveguide ports for orthogonal mode output are designed for a single circular waveguide orthogonal mode converter, so that polarization separation of signals is realized; the two branch ports are both designed in a mode of direct coupling of the side edge of the common waveguide, so that the structure of the orthogonal mode converter is simplified, the size is reduced, and the mode separation and transmission performance of the converter is better.
The invention adopts the design that two branch interfaces are directly coupled with two sides of the common waveguide, thereby simplifying the model structure, reducing the model size, better separating two groups of signals in different polarization modes and realizing better mode separation transmission characteristics.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. A K-band miniaturized orthogonal mode converter, characterized in that it is provided with:
an input interface employing a tapered common waveguide;
coupling two output interfaces of the side rectangular waveguide by adopting a common waveguide;
the output interface is directly coupled with the rectangular waveguide through the common waveguide wall;
the input interface is a phi 4.5mm non-standard circular waveguide;
the input interface is realized by a circular waveguide, rectangular cutting is carried out on the opposite side of the waveguide wall branch, and gradually-changed common waveguides are formed by different cutting depths and are connected with the output ends on the two sides; the first output interface branch is coupled to the middle section of the circular common waveguide, and the second output interface branch is coupled to the bottom section of the circular common waveguide.
2. The K-band miniaturized orthomode converter of claim 1, wherein the first output interface is a 10.67mm x 4.32mm non-standard rectangular waveguide.
3. The K-band miniaturized orthomode converter of claim 1, wherein the second output interface is a 10.67mm x 4.32mm non-standard rectangular waveguide.
4. The K-band miniaturized orthomode converter of claim 1, wherein a horizontally polarized signal is outputted by transitioning to the first output interface through several rectangular waveguides of different sizes; the direction of the second output port branch is opposite to the direction of the first output port branch; the common waveguide section transitions to the second output interface through several waveguides of different sizes.
5. The K-band miniaturized orthomode converter of claim 4, wherein a coupling groove is included at a coupling of the common waveguide and the side rectangular waveguide.
6. A radio electronic device using the K-band miniaturized orthogonal mode converter according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711004887.1A CN108011160B (en) | 2017-10-25 | 2017-10-25 | K-waveband miniaturized orthogonal mode converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711004887.1A CN108011160B (en) | 2017-10-25 | 2017-10-25 | K-waveband miniaturized orthogonal mode converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108011160A CN108011160A (en) | 2018-05-08 |
| CN108011160B true CN108011160B (en) | 2020-09-29 |
Family
ID=62051832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711004887.1A Active CN108011160B (en) | 2017-10-25 | 2017-10-25 | K-waveband miniaturized orthogonal mode converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108011160B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109742491B (en) * | 2018-12-13 | 2024-05-14 | 广东盛路通信科技股份有限公司 | Compact straight-buckling OMT |
| FR3097378B1 (en) | 2019-06-17 | 2021-12-10 | St Microelectronics Sa | Separation junction and / or combination of orthogonal signals in polarization of radiofrequency waves |
-
2017
- 2017-10-25 CN CN201711004887.1A patent/CN108011160B/en active Active
Non-Patent Citations (1)
| Title |
|---|
| "A Manufacturing-Oriented 90 GHz Ortho-Mode Transducer for a Polarimetric Experiment";L. Salghetti, R等;《2002 32nd European Microwave Conference》;20020926;第2-3页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108011160A (en) | 2018-05-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204966651U (en) | Directional coupler of broadband millimeter waveguide branch | |
| CN106876853B (en) | Ku-waveband broadband orthogonal mode coupler | |
| CN109149116B (en) | Novel dual-polarized horn antenna | |
| CN106450643B (en) | E-surface waveguide directional coupler and sixteen-path waveguide power divider applying same | |
| CN105071006B (en) | A kind of new orthomode coupler | |
| CN114335957B (en) | Power combining/distributing device | |
| CN112909471B (en) | High-isolation rectangular waveguide-microstrip power divider | |
| CN205319282U (en) | Branched guide coupler and waveguide inner space power combiner | |
| CN112886173B (en) | Dual-waveband orthogonal mode coupler | |
| CN108011160B (en) | K-waveband miniaturized orthogonal mode converter | |
| CN111900513B (en) | Orthogonal mode converter, antenna device and communication system | |
| CN206585050U (en) | A kind of V-band broadband waveguide branch directional coupler | |
| CN111384597A (en) | Broadband stepped spacer waveguide dual-circular polarizer | |
| CN106410354B (en) | A kind of Q-band barrier type orthomode coupler | |
| CN110943294B (en) | Broadband low-profile dual-circular-polarization panel antenna | |
| CN215771499U (en) | Space power combiner | |
| CN108493562A (en) | A kind of Gysel types power splitter and its component based on rectangular waveguide | |
| WO2018214426A1 (en) | Spatial power divider/combiner in ka band coaxial waveguide | |
| CN203134955U (en) | E-plane power divider in shape of Chinese character of Jin | |
| CN203134954U (en) | E-plane cross-shaped power divider | |
| CN219575909U (en) | Q frequency band broadband quadrature mode coupler | |
| CN114124243B (en) | High-isolation terahertz orthogonal mode isolation duplexer easy to machine | |
| CN115764225B (en) | Waveguide power divider | |
| CN209913009U (en) | Orthogonal mode coupler with frequency division function | |
| CN217405676U (en) | Novel composite waveguide |
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 | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211011 Address after: 210046 room 20-366, floor 2, building 04, Nanjing Jingang science and Innovation Park Phase I, No. 1, Kechuang Road, Yaohua street, Qixia District, Nanjing, Jiangsu Province Patentee after: NANJING HMC SYSTEM Co.,Ltd. Address before: 710071 Xi'an Electronic and Science University, 2 Taibai South Road, Shaanxi, Xi'an Patentee before: XIDIAN University |
|
| TR01 | Transfer of patent right |