CN112234331B - Isolation coupling type waveguide-to-microstrip conversion device and implementation method - Google Patents
Isolation coupling type waveguide-to-microstrip conversion device and implementation method Download PDFInfo
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- CN112234331B CN112234331B CN202011426899.5A CN202011426899A CN112234331B CN 112234331 B CN112234331 B CN 112234331B CN 202011426899 A CN202011426899 A CN 202011426899A CN 112234331 B CN112234331 B CN 112234331B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/08—Coupling devices of the waveguide type for linking dissimilar lines or devices
- H01P5/10—Coupling devices of the waveguide type for linking dissimilar lines or devices for coupling balanced lines or devices with unbalanced lines or devices
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- H—ELECTRICITY
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- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
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Abstract
The method comprises providing a waveguide cavity block, sequentially arranging along the signal transmission direction: the radio frequency isolator comprises a radio frequency insulator, an isolator and a coupling detection module; providing a wave synchronization converter, wherein one end of the wave synchronization converter is connected with the coupling detection module so as to output the coupled and detected signal from a waveguide port connected with the other end of the wave synchronization converter after the wave synchronization conversion; providing a cavity, and assembling the waveguide cavity block and the wave and wave converter in the cavity along the length direction of the cavity; the wave and converter has a step matching structure. The structure of the radio frequency insulator, the stepped matching structure, the waveguide cavity and the like is adopted to realize horizontal conversion transmission between a radio frequency signal plane and a waveguide, meanwhile, an isolator and a coupling detection circuit are integrated, reverse transmission has good isolation, forward transmission has a power detection function, and the microwave system is suitable for a coaxial-waveguide transition structure microwave system.
Description
Technical Field
The invention belongs to the field of communication, relates to a waveguide synthesis/microwave power division technology, and particularly relates to an isolation coupling type waveguide-to-microstrip conversion device and an implementation method.
Background
The wave conversion is a conversion means between a planar circuit and a waveguide structure widely applied in a microwave system, and the function of the wave conversion is to convert radio-frequency signals transmitted by the planar circuit into waveguide transmission, generally, the power borne by the planar circuit is limited, and larger power borne by the planar circuit can be obtained through the waveguide transmission.
The performance of the wave co-conversion, such as insertion loss, standing wave and power tolerance, will have a large impact on the performance of the whole system.
The conventional wave co-converter is of an orthogonal structure, is coupled to a waveguide port in a coaxial probe mode, and is not beneficial to integration of signal transmission directions and single in function because an input port and an output port are not on the same horizontal plane when the wave co-converter is used.
Disclosure of Invention
In order to solve the defects of the related prior art, the invention provides an isolation coupling type waveguide-to-microstrip conversion device and an implementation method thereof.
In order to realize the purpose of the invention, the following scheme is adopted:
the method for realizing the conversion of the isolated coupling type waveguide into the microstrip comprises the following steps:
providing a waveguide cavity block, and sequentially arranging thereon along a signal transmission direction: the coupling detection module is connected with the isolator to realize forward signal coupling detection in a parallel coupling mode;
providing a wave-to-wave converter, processing a step matching structure in the wave-to-wave converter, enabling the high end of the step matching structure to be connected with a wave-to-insulator, enabling the wave-to-insulator to penetrate out of one end of the wave-to-wave converter and then be connected with a coupling detection module, and enabling the low end of the step matching structure to penetrate through the other end of the wave-to-wave converter, so that the wave-to-wave converter introduces a signal after coupling detection from the high end of the step matching structure through the wave-to-insulator, and outputs the signal from the low end of the step matching structure after;
providing a cavity, assembling the waveguide cavity block and the wave and converter in the cavity along the length direction of the cavity, arranging a radio frequency connector at one end of the cavity in the length direction, connecting the radio frequency connector with a radio frequency insulator, arranging a waveguide port at the other end of the cavity in the length direction, and connecting the waveguide port with the other end of the wave and converter;
after being input from the radio frequency connector, the signal is output from the waveguide port through the radio frequency insulator, the isolator, the coupling detection module and the wave synchronization converter in sequence, so that the isolation coupling type waveguide-to-microstrip conversion is realized.
Furthermore, the coupling detection module is realized by adopting a coupling detection circuit which takes a plane radio frequency substrate as a carrier; connecting a main path port I of the coupling detection circuit with an isolator, and connecting a main path port II with a wave-sharing insulator of a wave-sharing converter; connecting a coupling port I of a coupling detection circuit with a load resistor to the ground to absorb the coupling power of the port; connecting a coupling port II of the coupling detection circuit with a detection diode, connecting the detection diode with a loop resistor to the ground, and providing a detection loop for the detection diode; and connecting the detection diode with the feed insulator to realize coupling detection output.
Further, the waveguide cavity block is integrally machined and formed in a milling mode, and is provided with the following parts during machining: a first channel; a first fitting groove communicating with the first passage; a second passage communicating with the first fitting groove; the second assembling groove is positioned on one side of the second channel and communicated with the second channel; the third assembling groove is positioned on one side of the second channel and is communicated with the second channel;
installing a radio frequency insulator in the first channel; mounting the isolator to the first mounting groove; mounting a coupling detector circuit to the second channel; mounting the coupling port I and the load resistor in a second assembling groove; and mounting the coupling port II, the detection diode, the loop resistor and the feed insulator in a third assembly groove, and extending the feed insulator out of one side of the cavity.
Further, before the waveguide cavity block is assembled in the cavity, a waveguide cover plate is arranged on the top surface of the waveguide cavity block, so that the first channel, the first assembling groove, the second channel, the second assembling groove and the third assembling groove are closed from the top surface of the waveguide cavity block to shield signals; after the waveguide cover plate is assembled, the waveguide cavity block, the waveguide cover plate, the radio frequency insulator, the isolator and the coupling detection module form a whole and are positioned at one end of the wave and wave converter.
Furthermore, when the radio frequency connector is connected with the radio frequency insulator, the radio frequency insulator extends out of one end of the cavity and then is connected with the radio frequency connector.
When the other end of the cavity in the length direction is provided with the waveguide port, the periphery of the waveguide port is provided with the conductive sealing groove.
Further, the isolator can be installed reversely, and when the isolator is installed reversely, the whole isolation coupling type waveguide is converted into the signal of the microstrip to be transmitted reversely.
An isolated coupling type waveguide-to-microstrip device comprising:
the waveguide cavity block and the wave-sharing converter are sequentially arranged in the cavity along the length direction of the cavity; wherein:
one end of the cavity in the length direction is provided with a radio frequency connector, and the other end of the cavity is provided with a waveguide port;
the waveguide cavity block is sequentially provided with the following components in the signal transmission direction:
the radio frequency insulator is connected with the radio frequency connector to introduce signals;
the isolator is connected with the radio frequency insulator and is used for absorbing reverse power;
the coupling detection module is connected with the isolator and used for realizing forward signal coupling detection in a parallel coupling mode;
the wave-sharing converter is provided with a step matching structure, the high end of the step matching structure is connected with a wave-sharing insulator, the wave-sharing insulator penetrates out of one end of the wave-sharing converter and then is connected with the coupling detection module, the low end of the step matching structure penetrates through the other end of the wave-sharing converter and is connected with the waveguide port, and the wave-sharing converter is used for introducing signals after coupling detection from the high end of the step matching structure through the wave-sharing insulator and outputting from the low end of the step matching structure through the waveguide port after traveling wave-sharing conversion.
Furthermore, the coupling detection module comprises a coupling detection circuit which takes the plane radio frequency substrate as a carrier; a main path port I of the coupling detection circuit is connected with the isolator, and a main path port II of the coupling detection circuit is connected with a wave-sharing insulator of the wave-sharing converter; a coupling port I of the coupling detection circuit is used for connecting a load resistor to the ground and absorbing the coupling power of the port; the coupling port II of the coupling detection circuit is connected with a detection diode, and the detection diode is connected with the loop resistor to the ground and is used for providing a detection loop for the detection diode; the detection diode is connected with a feed insulator and is used for realizing coupling detection output.
Further, the waveguide cavity block is integrally machined and formed in a milling mode, and is provided with: the first channel is used for accommodating the radio frequency insulator; a first fitting groove communicating with the first passage for accommodating the separator; a second passage communicating with the first fitting groove for accommodating the coupling detector circuit; the second assembling groove is positioned on one side of the second channel, is communicated with the second channel and is used for accommodating the coupling port I and the load resistor; and the third assembling groove is positioned on one side of the second channel, is communicated with the second channel and is used for accommodating the coupling port II, the detection diode, the loop resistor and the feed insulator.
Further, the top surface of the waveguide cavity block is provided with a waveguide cover plate for sealing the first channel, the first assembling groove, the second channel, the second assembling groove and the third assembling groove from the top surface of the waveguide cavity block so as to shield signals; after assembly, the waveguide cavity block, the waveguide cover plate, the radio frequency insulator, the isolator and the coupling detection module form a whole and are positioned at one end of the wave and wave converter.
Furthermore, the radio frequency insulator extends out of one end of the cavity and then is connected with the radio frequency connector, the feed insulator extends out of one side of the cavity, and a conductive sealing groove is formed in the periphery of the waveguide port.
The invention has the beneficial effects that:
1. an isolator, a coupling detection circuit and a wave-sharing converter are integrated in a planar circuit, and the wave-sharing converter adopts a step matching structure, so that signal transmission is in the same direction, horizontal compact installation is facilitated, and final signal transmission is completed;
2. the isolator has a reverse isolation function and can be reversely mounted to realize signal reverse transmission, and the whole passive structure forms a universal module with various functions;
3. the integrated multifunctional design adopts an integrated mode of an isolator, a coupling detection circuit and a wave synchronization converter, realizes horizontal transmission between a planar circuit and a waveguide structure, has a bidirectional transmission characteristic, has good performance characteristics of forward coupling detection and reverse isolation, and can be widely applied to a transition system of the planar circuit and the waveguide structure;
4. the structure is simple, the impedance matching of each port is good, the insertion loss is low, and the working bandwidth is wide.
Drawings
The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present disclosure.
Fig. 1 shows an exploded view of the overall structure of an embodiment of the present application.
Fig. 2 shows a top view of the overall structure of an embodiment of the present application without a waveguide cover plate.
Fig. 3 shows a perspective view of the overall structure of an embodiment of the present application.
Fig. 4 shows a schematic diagram of a step matching structure of the wave-to-converter according to the embodiment of the present application.
Fig. 5 shows a return loss characteristic curve of a waveguide port of the waveguide/diplexer according to the embodiment of the present application.
Fig. 6 shows a transmission insertion loss characteristic curve of the wdm converter according to the embodiment of the present application.
Fig. 7 shows a characteristic curve of the degree of bidirectional coupling of the coupling detector circuit according to the embodiment of the present application.
Reference numerals:
1-cavity, 2-isolator, 3-coupling detector module, 4-wave co-converter, 5-load resistor, 6-loop resistor, 7-detector diode, 8-feed insulator, 11-radio frequency insulator, 12-waveguide cavity block, 13-waveguide cover plate, 14-radio frequency connector, 15-waveguide port, 16-conductive seal groove, 21-first channel, 22-first assembly groove, 23-second channel, 24-second assembly groove, 25-third assembly groove, 30-coupling detector circuit, 301-main port I, 302-main port II, 311-coupling port I, 312-coupling port II.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings, but the described embodiments of the present invention are a part of the embodiments of the present invention, not all of the embodiments of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are usually placed in when used, and are only for convenience of describing the present invention and simplifying the description. The terms "first," "second," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. The terms "parallel", "perpendicular", etc. do not require that the components be absolutely parallel or perpendicular, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; either directly or indirectly through intervening media, or through both elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Example one
The embodiment provides a method for realizing microstrip conversion by using an isolation coupling type waveguide, which comprises the following steps:
s1, providing a waveguide cavity block 12, on which are sequentially arranged along the signal transmission direction: the radio frequency isolator 11 is used for connecting the radio frequency connector 14 to introduce signals, the isolator 2 is connected with the radio frequency isolator 11 to absorb reverse power, and the coupling detection module 3 is connected with the isolator 2 to realize forward signal coupling detection in a parallel coupling mode;
s2, providing a wave-to-converter 4, processing a step matching structure 41 inside the wave-to-converter 4, as shown in fig. 4, connecting a high end of the step matching structure 41 to a wave-to-insulator 42, penetrating the wave-to-insulator 42 out of one end of the wave-to-converter 4, and connecting the wave-to-detector module 3, and penetrating a low end of the step matching structure 41 through the other end of the wave-to-converter 4, so that the wave-to-converter 4 introduces a signal after coupling detection from the high end of the step matching structure 41 through the wave-to-insulator 42, and outputs the signal from the low end of the step matching structure 41 after performing the same-conversion of the traveling;
s3, providing a cavity 1, and assembling the waveguide cavity block 12 and the wave-mixing converter 4 in the cavity 1 along the length direction of the cavity 1, as shown in FIG. 3;
s4, arranging a radio frequency connector 14 at one end of the cavity 1 in the length direction, extending a radio frequency insulator 11 at one end of the cavity 1, and then connecting the radio frequency insulator with the radio frequency connector 14, as shown in FIG. 1, arranging a waveguide port 15 at the other end of the cavity 1 in the length direction, and connecting the waveguide port 15 with the other end of the wave and converter 4; a conductive seal groove 16 is provided on the outer peripheral side of the waveguide port 15, as shown in fig. 2 to 3.
After being input from the radio frequency connector 14, the signal passes through the radio frequency insulator 11, the isolator 2, the coupling detection module 3 and the wave identity converter 4 in sequence and is output from the waveguide port 15, so that the isolation coupling type wave identity conversion is realized.
As a more detailed implementation procedure, the coupling detector module 3 is implemented by using a coupling detector circuit 30 using a planar rf substrate as a carrier; a main path port I301 of the coupling detection circuit 30 is connected with the isolator 2, and a main path port II302 is connected with the diplexer 4; connecting a coupling port I311 of the coupling detection circuit 30 with a load resistor 5 to the ground to absorb the coupling power of the port; connecting the coupling port II312 of the coupling detector circuit 30 to the detector diode 7, connecting the detector diode 7 to the loop resistor 6 to the ground, and providing a detector loop for the detector diode 7; the detector diode 7 is connected to the feed insulator 8 to realize the coupling detection output.
As a more detailed implementation step, the waveguide cavity block 12 is integrally formed by milling, and during the machining, the following steps are provided: a first channel 21; a first fitting groove 22 communicating with the first passage 21; a second passage 23 communicating with the first fitting groove 22; a second fitting groove 24 located at one side of the second passage 23 and communicating with the second passage 23; and a third fitting groove 25 positioned at one side of the second passage 23 and communicating with the second passage 23.
Based on the structural characteristics of the waveguide cavity block 12, the radio frequency insulator 11 is arranged in the first channel 21; mounting the separator 2 to the first fitting groove 22; mounting the coupling detector circuit 30 to the second channel 23; mounting the coupling port I311 and the load resistor 5 in the second mounting groove 24; installing the coupling port II312, the detection diode 7, the loop resistor 6 and the feed insulator 8 in the third assembling groove 25, and extending the feed insulator 8 out of one side of the cavity 1; thereby, the waveguide cavity block 12 is used as a carrier for carrying the radio frequency insulator 11, the isolator 2 and the coupling detection module 3, and the three modules/devices are compact.
On the basis, a waveguide cover plate 13 is further provided and is arranged on the top surface of the waveguide cavity block 12, so that the first channel 21, the first assembly groove 22, the second channel 23, the second assembly groove 24 and the third assembly groove 25 are closed from the top surface of the waveguide cavity block 12 for signal shielding; after the waveguide cover plate 13 is assembled, the waveguide cavity block 12, the waveguide cover plate 13, the radio frequency insulator 11, the isolator 2 and the coupling detection module 3 form a whole and are positioned at one end of the wave and converter 4.
After the method is implemented, the same-wave conversion of the isolated coupling type is realized.
The return loss characteristic curve of the waveguide port of the waveguide/transformer 4 is shown in fig. 5.
The transmission insertion loss characteristic curve of the wave-to-converter 4 is shown in fig. 6.
Fig. 7 shows a characteristic curve of the degree of bidirectional coupling of the coupling detector circuit 30.
In this example, the isolator 2 may be installed in reverse, and when installed in reverse, the entire isolation-coupled waveguide is transferred to microstrip signal reverse transmission.
Example two
As shown in fig. 1 to 4, the isolation coupling type waveguide-to-microstrip apparatus provided in this embodiment mainly includes a radio frequency insulator 11, an isolator 2, a coupling circuit 3, a diplexer 4, a load resistor 5, a loop resistor 6, a detector diode 7, and a feed insulator 8.
The radio frequency insulator 11, the isolator 2, the coupling detection module 3 and the wave synchronization converter 4 are sequentially arranged along the signal transmission direction.
The radio frequency insulator 11 is used for connecting a radio frequency connector 14 to introduce signals; the isolator 2 is connected with the radio frequency insulator 11 and is used for absorbing reverse power; the coupling detection module 3 is connected with the isolator 2 and used for realizing forward signal coupling detection in a parallel coupling mode; the wave and converter 4 is provided with a step matching structure 41, the high end of the step matching structure 41 is connected with a wave and insulator 42, the wave and insulator 42 penetrates out of one end of the wave and converter 4 and then is connected with the coupling detection module 3, the low end of the step matching structure 41 penetrates through the other end of the wave and converter 4 and is connected with the waveguide port 15, and the wave and converter 4 is used for leading in signals after coupling detection from the high end of the step matching structure 41 through the wave and insulator 42 and outputting the signals from the low end of the step matching structure 41 through the waveguide port 15 after traveling wave and conversion.
Signals are input through a port of a radio frequency connector 14 and are introduced through a radio frequency insulator 11, the signals are transmitted through a coupling detection module 3 after passing through an isolator 2, the isolator 2 is used for absorbing reverse power, unidirectional transmission of the signals is guaranteed, the size of a load resistor of the isolator 2 is adjusted, and the reverse absorbed bearing power can be controlled; the coupling detection module 3 carries out forward coupling detection; then the signal is transmitted to the wave mixing converter 4, and is output to the waveguide port 15 after wave mixing conversion.
The embodiment ensures the signal transmission between the planar circuit and the waveguide structure, simultaneously realizes the advantages of forward coupling power detection, reverse isolation, horizontal transmission and the like, realizes the signal transmission between the X-band specific bandwidth planar circuit and the waveguide structure, simultaneously can install the radio frequency connector 14 at the radio frequency insulator to realize the signal transmission of the radio frequency connector 14, the waveguide port 15 is an international standard rectangular waveguide port, is suitable for the signal transmission of various standard waveguide ports, and the waveguide port 5 can also adopt a non-standard rectangular waveguide port form for signal transmission according to the system requirements.
The isolator 2 can be installed reversely, and when the isolator is installed reversely, the whole isolation coupling type waveguide is converted into signal reverse transmission of the microstrip device, so that the functions are unchanged.
The wave and switching module of the embodiment is of a passive structure, has strong universality and is convenient to use.
The wave and wave converter 4 adopts a step matching structure as shown in fig. 4, which not only can realize impedance matching, but also can realize the transmission of signals along the same direction without turning.
More specific implementation of this example:
the coupling detection module 3 includes a coupling detection circuit 30 using a planar rf substrate as a carrier; a main path port I301 of the coupling detection circuit 30 is connected with the isolator 2, and a main path port II302 is connected with the wave-sharing converter 4 and is fixed in a welding mode; the coupling port I311 of the coupling detection circuit 30 is connected with a 50 omega load resistor 5 to the ground and is used for absorbing the coupling power of the port; the coupling port II312 of the coupling detection circuit 30 is connected with the detection diode 7, and the detection diode 7 is connected with the loop resistor 6 to the ground and used for providing a detection loop for the detection diode 7; and the feed insulator 8 is welded at the output pad of the detection diode 7 to realize coupling detection output.
The isolator 2 and the coupling detection circuit 30 are integrated in a planar circuit, forward power coupling is realized in a parallel coupling line mode, forward coupling power detection voltage is generated through the load resistor 5, the loop resistor 6, the detection diode 7 and the like and is output through the feed insulator 8, the isolator 2 has a reverse isolation function, and waves and a conversion module form a universal module with multiple functions.
Specifically, the isolated coupling type waveguide-to-microstrip apparatus of the present embodiment further includes a cavity 1.
The radio frequency insulator 11, the isolator 2, the coupling detection module 3 and the wave synchronization converter 4 are sequentially arranged in the cavity 1 along the length direction of the cavity 1. As can be seen from the figure, the structural layout and the signal transmission are basically carried out on a straight line or a vertical plane.
Be equipped with in the cavity 1 through milling mode integral type machine-shaping's waveguide chamber piece 12, waveguide chamber piece 12 is equipped with: a first channel 21 for housing a radio frequency insulator 11; a first fitting groove 22 communicating with the first passage 21 for accommodating the separator 2; a second passage 23 communicating with the first fitting groove 22 for accommodating the coupling detector circuit 30; a second fitting groove 24 located on one side of the second channel 23 and communicating with the second channel 23 for accommodating the coupling port I311 and the load resistor 5; and a third fitting groove 25 located on the second passage 23 side and communicating with the second passage 23 for accommodating the coupling port II312, the detector diode 7, the loop resistor 6, and the feed insulator 8.
The top surface of the waveguide cavity block 12 is provided with a waveguide cover plate 13 which is integrally processed and formed in a milling mode and is used for sealing a first channel 21, a first assembly groove 22, a second channel 23, a second assembly groove 24 and a third assembly groove 25 from the top surface of the waveguide cavity block 12 so as to shield signals; after assembly, the waveguide cavity block 12, the waveguide cover plate 13, the radio frequency insulator 11, the isolator 2 and the coupling detection module 3 form a whole and are positioned at one end of the wave and converter 4.
The radio frequency insulator 11 extends out of one end of the cavity 1 and is connected with a radio frequency connector 14 arranged at one end of the cavity 1, the waveguide port 15 is arranged at the opposite end of the cavity 1, and the feed insulator 8 extends out of one side of the cavity 1.
By the aid of the structural design, the wave synchronization conversion module structure is more suitable for horizontal structure installation, and installation requirements of various forms can be met by optimizing planar circuit layout.
In the present embodiment, the integrated isolator 2, the coupling detection module 3, the diplexer 4, and the like are comprehensively optimized, and the return loss characteristic curve of the waveguide port of the diplexer 4 is shown in fig. 5, the transmission insertion loss characteristic curve of the diplexer 4 is shown in fig. 6, and the bidirectional coupling characteristic curve of the coupling detection circuit 30 is shown in fig. 7 of the obtained diplexer module.
In the embodiment, a cavity is designed by one-time milling, a radio frequency substrate is integrated in the cavity 1, ports of devices of all parts are welded on a microstrip line, the upper part of a waveguide cavity block 12 is subjected to signal shielding in a screw locking mode through a waveguide cover plate 13, and a conductive sealing groove 16 is designed at a waveguide port 15, so that power leakage can be prevented. The wave-sharing conversion module structure is suitable for horizontal structure installation, and can meet the installation requirements of various forms by optimizing the planar circuit layout
The wave-sharing conversion module can be suitable for transition between a planar circuit and a waveguide structure, is simple in structural form, small in size, multifunctional and wide in coverage frequency band, adopts a horizontal wave-sharing converter design, enables the structure of the wave-sharing conversion module to be more compact, and ensures performance indexes of all ports.
The foregoing is only a preferred embodiment of the present invention and is not intended to be exhaustive or to limit the invention. It will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the invention.
Claims (8)
1. The method for realizing the conversion from the isolated coupling type waveguide to the microstrip is characterized by comprising the following steps of:
providing a waveguide cavity block (12) on which are arranged in succession in the direction of signal transmission: the device comprises a radio frequency insulator (11) used for connecting a radio frequency connector (14) to introduce signals, an isolator (2) connected with the radio frequency insulator (11) to absorb reverse power, and a coupling detection module (3) connected with the isolator (2) to realize forward signal coupling detection in a parallel coupling mode;
providing a wave-sharing converter (4), processing a step matching structure (41) in the wave-sharing converter, connecting the high end of the step matching structure (41) with a wave-sharing insulator (42), penetrating the wave-sharing insulator (42) out of one end of the wave-sharing converter (4) and then connecting the wave-sharing insulator with a coupling detection module (3), and penetrating the low end of the step matching structure (41) through the other end of the wave-sharing converter (4), so that the wave-sharing converter (4) introduces a signal after coupling detection from the high end of the step matching structure (41) through the wave-sharing insulator (42), and outputs the signal from the low end of the step matching structure (41) after wave-sharing conversion;
providing a cavity (1), assembling a waveguide cavity block (12) and a waveguide and converter (4) in the cavity (1) along the length direction of the cavity (1), arranging a radio frequency connector (14) at one end of the cavity (1) in the length direction, connecting the radio frequency connector (14) with a radio frequency insulator (11), arranging a waveguide port (15) at the other end of the cavity (1) in the length direction, and connecting the waveguide port (15) with the other end of the waveguide and converter (4);
the coupling detection module (3) is realized by a coupling detection circuit (30) which takes a planar radio frequency substrate as a carrier; a main path port I (301) of the coupling detection circuit (30) is connected with the isolator (2), and a main path port II (302) is connected with a wave-sharing insulator (42) of the wave-sharing converter (4); connecting a coupling port I (311) of a coupling detection circuit (30) with a load resistor (5) to the ground so as to absorb the coupling power of the port; connecting a coupling port II (312) of the coupling detection circuit (30) with a detection diode (7), connecting the detection diode (7) with a loop resistor (6) to the ground, and providing a detection loop for the detection diode (7); connecting a detection diode (7) with a feed insulator (8) to realize coupling detection output;
after being input from the radio frequency connector (14), the signals sequentially pass through the radio frequency insulator (11), the isolator (2), the coupling detection module (3) and the wave synchronization converter (4) and are output from the waveguide port (15), so that the purpose of converting the isolated coupling type waveguide into the microstrip is achieved.
2. The realization method of the isolated coupling type waveguide-microstrip of claim 1, wherein the waveguide cavity block (12) is integrally formed by milling, and is provided with:
a first channel (21);
a first fitting groove (22) communicating with the first passage (21);
a second passage (23) communicating with the first fitting groove (22);
a second fitting groove (24) located on the side of the second passage (23) and communicating with the second passage (23);
a third fitting groove (25) located on the side of the second passage (23) and communicating with the second passage (23);
mounting a radio frequency insulator (11) in the first channel (21);
mounting the separator (2) to the first fitting groove (22);
mounting a coupling detector circuit (30) to the second channel (23);
mounting the coupling port I (311) and the load resistor (5) in the second mounting groove (24);
the coupling port II (312), the detection diode (7), the loop resistor (6) and the feed insulator (8) are mounted on the third assembly groove (25), and the feed insulator (8) extends out of one side of the cavity (1).
3. The method of claim 2, wherein the waveguide-to-microstrip conversion includes:
before the waveguide cavity block (12) is assembled in the cavity (1), a waveguide cover plate (13) is arranged on the top surface of the waveguide cavity block (12) to seal a first channel (21), a first assembling groove (22), a second channel (23), a second assembling groove (24) and a third assembling groove (25) from the top surface of the waveguide cavity block (12) so as to shield signals; after the waveguide cover plate (13) is assembled, the waveguide cavity block (12), the waveguide cover plate (13), the radio frequency insulator (11), the isolator (2) and the coupling detection module (3) form a whole and are positioned at one end of the wave-to-wave converter (4);
when the radio frequency connector (14) is connected with the radio frequency insulator (11), the radio frequency insulator (11) extends out of one end of the cavity (1) and then is connected with the radio frequency connector (14);
when the other end of the cavity (1) in the length direction is provided with a waveguide port (15), a conductive seal groove (16) is arranged on the periphery of the waveguide port (15).
4. The method for realizing the transition from the isolated coupling type waveguide to the microstrip according to claim 1, wherein when the isolator (2) is installed reversely, the signal reverse transmission mode is realized by the transition from the isolated coupling type waveguide to the microstrip.
5. An isolated coupling type waveguide-to-microstrip apparatus, comprising:
the waveguide cavity comprises a cavity body (1), and a waveguide cavity block (12) and a wave-to-wave converter (4) which are sequentially arranged in the cavity body (1) along the length direction of the cavity body (1); wherein:
one end of the cavity (1) in the length direction is provided with a radio frequency connector (14), and the other end is provided with a waveguide port (15);
the waveguide cavity block (12) is sequentially provided with the following components in the signal transmission direction:
the radio frequency insulator (11) is connected with the radio frequency connector (14) to introduce signals;
the isolator (2) is connected with the radio frequency insulator (11) and is used for absorbing reverse power;
the coupling detection module (3) is used for realizing forward signal coupling detection in a parallel coupling mode and comprises a coupling detection circuit (30) taking a planar radio frequency substrate as a carrier, a main path port I (301) of the coupling detection circuit (30) is connected with the isolator (2), and a main path port II (302) is connected with the wave co-converter (4); a coupling port I (311) of the coupling detection circuit (30) is connected with a load resistor (5) to the ground and is used for absorbing the coupling power of the port; a coupling port II (312) of the coupling detection circuit (30) is connected with the detection diode (7), and the detection diode (7) is connected with the loop resistor (6) to the ground and used for providing a detection loop for the detection diode (7); the detection diode (7) is connected with a feed insulator (8) and is used for realizing coupling detection output;
the wave is with converter (4), it has ladder matching structure (41), the high one end of ladder matching structure (41) is connected with a wave and insulator (42), wave and insulator (42) are connected with main road port II (302) of coupling detection circuit (30) after passing out wave and converter (4) one end, the low one end of ladder matching structure (41) link up the wave and converter (4) other end and are connected with waveguide mouth (15), wave and converter (4) are used for leading in the signal after the coupling detection from the high one end of ladder matching structure (41) through wave and insulator (42), and carry out the wave and with the conversion after export from the low one end of ladder matching structure (41) through waveguide mouth (15).
6. The microstrip transition device according to claim 5, wherein the waveguide cavity block (12) is integrally formed by milling, and has:
a first channel (21) for housing a radio frequency insulator (11);
a first fitting groove (22) communicating with the first passage (21) for accommodating the separator (2);
a second passage (23) communicating with the first fitting groove (22) for accommodating a coupling detector circuit (30);
a second fitting groove (24) located on the side of the second passage (23) and communicating with the second passage (23) for accommodating the coupling port I (311) and the load resistor (5);
and a third assembling groove (25) which is positioned on one side of the second channel (23) and communicated with the second channel (23) and is used for accommodating the coupling port II (312), the detection diode (7), the loop resistor (6) and the feed insulator (8).
7. The isolated coupling type waveguide-to-microstrip device according to claim 6, wherein the top surface of the waveguide cavity block (12) is provided with a waveguide cover plate (13) for enclosing the first channel (21), the first assembly groove (22), the second channel (23), the second assembly groove (24), and the third assembly groove (25) from the top surface of the waveguide cavity block (12) for signal shielding; after assembly, the waveguide cavity block (12), the waveguide cover plate (13), the radio frequency insulator (11), the isolator (2) and the coupling detection module (3) form a whole and are positioned at one end of the wave and converter (4).
8. The microstrip transition device according to claim 5, wherein the radio frequency insulator (11) extends out of one end of the cavity (1) and is connected to the radio frequency connector (14), the feeding insulator (8) extends out of one side of the cavity (1), and the outer peripheral side of the waveguide port (15) is provided with a conductive sealing groove (16).
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