CN116565502A - Cross coupler and feed source assembly - Google Patents
Cross coupler and feed source assembly Download PDFInfo
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- CN116565502A CN116565502A CN202310845720.7A CN202310845720A CN116565502A CN 116565502 A CN116565502 A CN 116565502A CN 202310845720 A CN202310845720 A CN 202310845720A CN 116565502 A CN116565502 A CN 116565502A
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- 230000007704 transition Effects 0.000 claims description 52
- 230000003044 adaptive effect Effects 0.000 abstract description 3
- 230000006978 adaptation Effects 0.000 abstract 1
- 230000010287 polarization Effects 0.000 description 24
- 239000000306 component Substances 0.000 description 21
- 238000004891 communication Methods 0.000 description 20
- 238000013461 design Methods 0.000 description 11
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- 230000009977 dual effect Effects 0.000 description 4
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- 239000008358 core component Substances 0.000 description 2
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Classifications
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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
- H01P5/12—Coupling devices having more than two ports
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/0006—Particular feeding systems
Abstract
The utility model provides a cross coupler and feed subassembly, cross coupler includes the public port of a four-ridge circular waveguide structure and four single-ridge waveguide structure's coupling port, and wherein, the bottom and the four coupling ports of public port are connected, and four-ridge circular waveguide structure includes the four-ridge structure of awl structure and adaptation awl structure, sets up according to the corner of predetermineeing between four-ridge structure and four coupling port's the single ridge. By using the common port of the four-ridge circular waveguide structure comprising the cone structure and the adaptive cone structure and the coupling ports of the four single-ridge waveguide structures on the cross coupler, the ultra-wideband coverage radio frequency performance is realized, the ultra-wideband range can be covered, and the ultra-wideband coverage radio frequency performance is good.
Description
Technical Field
The specification relates to the technical field of communication satellites, and in particular relates to a cross coupler and a feed source assembly.
Background
With the development of communication technology and the increasing demand for communication capacity of communication satellites, the demand for antenna bandwidth of feeder links and inter-satellite links is also increasing. Even if the communication system adopts the techniques of dual polarization multiplexing, high-order modulation and the like, the bandwidth of the currently mainstream satellite-borne Ka (K-above) frequency band broadband antenna is far from being enough in the face of the communication rate requirement of tens of Gabs (gigabit per second) to hundreds of Gbps just before the whole satellite communication capacity. In order to meet the communication capacity requirement of hundreds of Gbps on the whole satellite at hand, a satellite-borne antenna with higher frequency and wider bandwidth is developed, and the problem of insufficient bandwidth of the current main stream Ka frequency band broadband antenna is very necessary.
At present, the cross coupler has the advantages of high frequency response and low insertion loss because of being capable of effectively completing signal coupling, and is widely applied to feed source components to form a broadband antenna to realize satellite communication with high communication capacity. In order to improve the bandwidth of the antenna, requirements are put forward on the matching performance of the cross coupler and the ultra-wideband, and the development of the cross coupler matched with the wideband is of great significance in improving the performance of the wideband antenna.
Disclosure of Invention
In view of this, embodiments of the present disclosure provide a cross-shaped coupler and feed assembly to solve the technical drawbacks of the prior art.
The embodiment of the specification provides a cross coupler, which comprises a public port of a four-ridge circular waveguide structure and coupling ports of four single-ridge waveguide structures, wherein the bottom of the public port is connected with the four coupling ports, the four-ridge circular waveguide structure comprises a cone structure and a four-ridge structure adapting to the cone structure, and the four-ridge structure and the single ridges of the four coupling ports are arranged according to a preset rotation angle.
Optionally, a ridge structure transition section is arranged between the common port and the coupling port; the ridge structure transition section comprises a multi-ridge waveguide transition section and a single-ridge waveguide transition section, wherein the multi-ridge waveguide transition section is arranged below the public port, the multi-ridge waveguide transition section is provided with ridges opposite to four ridges of the public port, the single-ridge waveguide transition section is arranged at the joint of the multi-ridge waveguide transition section and the coupling port, and the ridges of the single-ridge waveguide transition section are opposite to the ridges of the coupling port.
Alternatively, four ridges of a common port in the cross-shaped coupler are disposed opposite the single ridge of each coupled port, respectively.
Optionally, the multi-ridge waveguide transition in the cross-shaped coupler is a square four-ridge waveguide transition.
Optionally, the four-ridge circular waveguide structure of the common port of the cross-shaped coupler includes a pyramid structure that is a rectangular pyramid structure.
Optionally, the common port is connected to the spine structure transition section with a bevel structure adapted to the rectangular pyramid structure.
Optionally, four ridges of a common port in the cross-shaped coupler are each at a 45 ° angle to a single ridge of each coupled port.
Optionally, the multi-ridge waveguide transition in the cross-shaped coupler is a circular waveguide transition, and the circular waveguide transition is provided with triangular ridges opposite the ridges of the coupling port.
Optionally, the four-ridge circular waveguide structure of the common port of the cross-shaped coupler includes a cone structure that is a cone structure.
Optionally, the common port is connected to the spine structure transition section using a bevel structure that fits into the cone structure.
The embodiment of the specification also provides a feed source assembly which comprises the cross coupler.
The cross coupler provided by the specification comprises a public port of a four-ridge circular waveguide structure and coupling ports of four single-ridge waveguide structures, wherein the four-ridge circular waveguide structure comprises a cone structure and a four-ridge structure adapting to the cone structure.
The cross coupler comprises a public port of a four-ridge circular waveguide structure and coupling ports of four single-ridge waveguide structures, wherein the bottom of the public port is connected with the four coupling ports, the four-ridge circular waveguide structure comprises a cone structure and a four-ridge structure which is adaptive to the cone structure, the four-ridge structure and the single ridges of the four coupling ports are arranged according to a preset corner, broadband signals are effectively coupled, and good ultra-wideband matching performance between the public port of the four-ridge circular waveguide structure and the coupling ports of the four single-ridge waveguide structures can be achieved. Good radio frequency performance covering ultra-wideband is realized. Therefore, the cross coupler designed by the specification can cover an ultra-wideband range and has good performance.
Drawings
Fig. 1 is a three-dimensional structure diagram of an ultra-wideband cross coupler according to an embodiment of the present disclosure;
fig. 2 is a cross-sectional view of an ultra-wideband cross-shaped coupler according to an embodiment of the present disclosure;
fig. 3 is a graph of a common port S11 of an ultra-wideband cross coupler according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a 45 ° corner ultra-wideband cross coupler according to an embodiment of the present disclosure;
FIG. 5 is a graph of simulation results of a 45 degree corner ultra-wideband provided in the embodiments of the present disclosure;
FIG. 6 is an overall block diagram of a feed assembly provided in an embodiment of the present disclosure;
fig. 7 is a connection diagram of each part in a feed source assembly according to an embodiment of the present disclosure.
Reference numerals
1-first part, 2-second part, 3-third part, 4-fourth part, 5-fifth part, 6-sixth part, 7-seventh part;
8-four-ridge circular waveguide broadband loudspeaker and 9-ultra-wideband circularly polarized feed source network;
101-common port, 102-coupled port, 103-cone structure, 104-four-ridge structure, 105-single ridge.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present description. This description may be embodied in many other forms than described herein and similarly generalized by those skilled in the art to whom this disclosure pertains without departing from the spirit of the disclosure and, therefore, this disclosure is not limited by the specific implementations disclosed below.
The terminology used in the one or more embodiments of the specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the one or more embodiments of the specification. As used in this specification, one or more embodiments and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used in one or more embodiments of the present specification refers to and encompasses any or all possible combinations of one or more of the associated listed items.
It should be understood that, although the terms first, second, etc. may be used in one or more embodiments of this specification to describe various information, these information should not be limited by these terms. These terms are only used to distinguish one type of information from another. For example, a first may also be referred to as a second, and similarly, a second may also be referred to as a first, without departing from the scope of one or more embodiments of the present description. The word "if" as used herein may be interpreted as "at … …" or "at … …" or "responsive to a determination", depending on the context.
In order to cope with the application requirements of high-capacity communication on high-frequency band and wide-frequency band antennas, in recent two years, QV frequency band antennas have been started to be applied in a plurality of satellite systems on the basis of mainstream Ka frequency band communication application so as to improve the communication capacity of communication satellites. In order to further improve the communication capacity, the development of the E-band antenna is gradually being put on schedule. At present, a Q, V, E feed source component product with one or two frequency bands or a Ka/Q, Q/V and V/W double-frequency band feed component product exists internationally, but a QVE four-frequency band feed source product is not integrated, so that the communication capacity of a satellite is limited to a certain extent. The QVE ultra-wideband dual circularly polarized feed source assembly can be applied to a pair of antennas, and simultaneously realizes dual circularly polarized working performance of broadband (each 5GHz bandwidth of each frequency band) in four frequency bands of Q (37.5 GHz-42.5 GHz), V (46.5 GHz-51.5 GHz) and E (71 GHz-76GHz and 81GHz-86 GHz), namely, a pair of antennas can realize the technical function of a plurality of antennas, the number of antennas on a satellite is reduced, the stressed platform resources on the satellite are effectively released, and more importantly, the application of the feed source assembly can improve the communication capacity of the satellite, and solve the problem that the QV load communication capacity of the current communication satellite is limited.
At present, the cross coupler is used for completing broadband coverage, and a frequency grading extraction coupling mode is mainly adopted, under the mode, the broadband range is only suitable for individual frequency bands, the working bandwidth is limited, and the coverage of a plurality of frequency bands cannot be realized.
In order to solve the above problems, the present disclosure provides a cross-shaped coupler and feed source assembly, which includes a common port of a four-ridge circular waveguide structure and coupling ports of four single-ridge waveguide structures, wherein the bottom of the common port is connected with the four coupling ports, the four-ridge circular waveguide structure includes a cone structure and a four-ridge structure adapted to the cone structure, and the four-ridge structure and the single ridges of the four coupling ports are arranged according to a preset rotation angle.
The cross coupler comprises a public port of a four-ridge circular waveguide structure and coupling ports of four single-ridge waveguide structures, wherein the bottom of the public port is connected with the four coupling ports, the four-ridge circular waveguide structure comprises a cone structure and a four-ridge structure which is adaptive to the cone structure, the four-ridge structure and the single ridges of the four coupling ports are arranged according to a preset corner, broadband signals are effectively coupled, and good ultra-wideband matching performance between the public port of the four-ridge circular waveguide structure and the coupling ports of the four single-ridge waveguide structures can be achieved. The radio frequency performance of well covering ultra-wideband is realized. Therefore, the cross coupler designed by the specification can cover an ultra-wideband range and has good performance.
In the present specification, a cross-shaped coupler is provided, and detailed description is given in the following embodiments.
Fig. 1 shows a three-dimensional structure diagram of an ultra-wideband cross coupler provided in an embodiment of the present specification. FIG. 2 shows a cross-sectional view of an ultra-wideband cross-shaped coupler provided by embodiments of the present disclosure; as shown in fig. 1 and 2, the cross-shaped coupler includes a common port 101 of a four-ridge circular waveguide structure and coupling ports 102 of four single-ridge waveguide structures, wherein the bottom of the common port 101 is connected with the coupling ports 102 of the four single-ridge waveguide structures, the four-ridge circular waveguide structure includes a cone structure 103 and a four-ridge structure 104 adapted to the cone structure 103, and the four-ridge structure 104 and the single-ridge 105 of the four coupling ports 102 are arranged according to a preset angle.
The cross coupler comprises a public port 101 of a four-ridge circular waveguide structure and coupling ports 102 of four single-ridge waveguide structures, the bottom of the public port 101 is connected with the coupling ports 102 of the four single-ridge waveguide structures, the four-ridge circular waveguide structure comprises a cone structure 103 and a four-ridge structure 104 adapting to the cone structure 103, and the four-ridge structure 104 and the single-ridge 105 of the four coupling ports 102 are arranged according to a preset angle, so that the cross coupler can achieve good ultra-wideband matching performance between the public port 101 of the four-ridge circular waveguide structure and the coupling ports 102 of the four single-ridge waveguide structures, and has good matching performance in a wideband range with a relative bandwidth of 84.6% (36.5 GHz-90 GHz). Therefore, the cross-shaped coupler provided by the embodiments of the present specification may also be referred to as an ultra-wideband cross-shaped coupler.
An ultra-wideband cross coupler is one of the key and core components of a feed assembly. In order to facilitate the realization of the integral feed source layer profile structural design and the cascading of the ultra-wideband phase shifter, the ultra-wideband cross coupler can be in a flattened design. The ultra-wideband cross coupler has five ports in total, the common port 101 is of a four-ridge circular waveguide structure, and the diameter size is smaller and is only 3mm; the other four coupled ports 102 are of a single ridge waveguide structure.
In one implementation of the present embodiments, the coupling port 102 couples electromagnetic wave energy by way of E-plane coupling. The E-plane coupling can realize a compact structure, and is convenient for the design of a laminated structure.
The cross coupler adopts a ridge waveguide structure, and expands the working bandwidth of a main mode of the feed source assembly. By reasonably selecting the ridge waveguide size, the low-frequency end of the working frequency band can be guaranteed to be free of cutoff, and meanwhile, the high-frequency mode suppression device has good high-order mode suppression performance in the high frequency band.
In one implementation of the embodiments of the present description, a ridge structure transition is provided between the common port 101 and the coupling port 102;
specifically, the ridge structure transition section includes a multi-ridge waveguide transition section and a single-ridge waveguide transition section, wherein the multi-ridge waveguide transition section is disposed below the common port 101, the multi-ridge waveguide transition section is provided with ridges opposite to four ridges of the common port 101, the single-ridge waveguide transition section is disposed at a junction of the multi-ridge waveguide transition section and the coupling port 102, and the ridges of the single-ridge waveguide transition section are disposed opposite to the ridges of the coupling port 102.
A section of multi-ridge waveguide transition section and a small-size single-ridge waveguide transition section are loaded between a common port 101 of the four-ridge circular waveguide structure and a coupling port 102 of the four single-ridge waveguide structure, and the structures can enable the ultra-wideband cross coupler to have good matching performance in a wideband range with a relative bandwidth of 84.6% (36.5 GHz-90 GHz).
The ridge structure transition section can ensure that the ultra-wideband cross coupler has good matching performance in a wideband range.
In an alternative embodiment of the present description, four ridges of a common port 101 in a cross-shaped coupler are disposed opposite a single ridge 105 of each coupling port 102, respectively.
Since the common port 101 in the cross-shaped coupler is a four-ridge structure 104 with each ridge being opposite each ridge of each coupling port 102, respectively, and the multi-ridge waveguide transition in the cross-shaped coupler is a square four-ridge waveguide transition.
Four ridges of the common port 101 of the cross-shaped coupler are respectively arranged opposite to the single ridges 105 of each coupling port 102, so that good ultra-wideband matching performance between the common port of the four-ridge circular waveguide structure and the coupling ports 102 of the four single-ridge waveguide structure can be realized.
As shown in fig. 2, a cross-sectional view of an ultra-wideband cross-shaped coupler according to an embodiment of the present disclosure is shown; as shown in fig. 3, a graph of the common port S11 of the ultra-wideband cross-shaped coupler provided in the embodiment of the present disclosure, it can be seen from the graph that the ultra-wideband cross-shaped coupler has good matching performance in a wideband range with a relative bandwidth of 84.6% (36.5 ghz-90 ghz).
In an alternative embodiment of the present disclosure, the four-ridged-round waveguide structure of the common port 101 of the cross-shaped coupler comprises a cone structure 103 that is a rectangular pyramid structure.
The four-ridge circular waveguide structure in the cross coupler comprises a rectangular pyramid structure and a four-ridge structure 104 adapting to the rectangular pyramid structure, and four ridges of the common port 101 in the cross coupler are combined to be respectively arranged opposite to the single ridges 105 of the coupling ports 102, so that good ultra-wideband matching performance between the common port 101 of the four-ridge circular waveguide structure and the coupling ports 102 of the four single-ridge waveguide structures can be further realized.
In an alternative embodiment of the present description, the common port 101 is connected to the ridge structure transition using a bevel structure adapted to the rectangular pyramid structure.
The four-ridge circular waveguide structure comprises a middle cone structure 103 and a four-ridge structure 104 adapting to the cone structure 103, wherein the four-ridge structure 104 is a special optimized structure: the inclined plane structure is shown in fig. 1, and fig. 1 is a three-dimensional structure diagram of an ultra-wideband cross coupler provided in the embodiment of the present specification, and by means of the design, good ultra-wideband matching performance with four single-ridge waveguide structures can be achieved.
In an alternative embodiment of the present disclosure, the four ridges of the common port 101 in the cross-shaped coupler are each at a 45 ° angle to the single ridge 105 of each coupling port 102.
Four ridges of a common port 101 in the cross coupler form 45-degree angles with single ridges 105 of each coupling port 102 respectively, 45-degree linear polarization feeding of four-ridge circular waveguides is achieved, and good circular polarization performance in ultra-wide band is achieved by combining a ridge waveguide phase shifter.
In an alternative embodiment of the present disclosure, the multi-ridge waveguide transition in the cross-shaped coupler is a circular waveguide transition, and the circular waveguide transition is provided with triangular ridges opposite the ridges of the coupling port 102.
In the feed source assembly, an ultra-wideband cross coupler and an ultra-wideband phase shifter are connected in cascade to form an ultra-wideband circular polarizer, and in order to achieve circular polarization working performance of the final feed source assembly, the ultra-wideband circular polarizer is required to be subjected to 45-degree linear polarization feed by the cross coupler. In the feed source component system formed by adopting the circular waveguides, no specific design is needed, and two circular waveguides are directly connected. For four-ridge circular waveguides, two four-ridge circular waveguides rotate 45 degrees to perform linear polarization direct connection, the four-ridge waveguides are completely misplaced, and transmission performance cannot be achieved. That is, the four-ridge circular waveguide cannot realize 45 ° linear polarization feeding by simply rotating 45 ° to realize double circular polarization performance.
In order to solve the core problem, the embodiment of the specification provides a 45-degree corner ultra-wideband cross coupler, which well solves the bottleneck problem of 45-degree linear polarization feed, is a key ring which can be realized by the high-performance feed source assembly, and is one of core components of the ultra-wideband feed source assembly. The 45 ° corner ultra-wideband cross coupler in the embodiment of the present disclosure is a cross coupler structure corresponding to four ridge structures 104 and four coupled single ridge waveguide ports in a four ridge circular waveguide in a non-parallel manner, that is, four ridges of the common port 101 form a 45 ° corner with the single ridge 105 of each coupled port 102, and four ridges of the four coupled single ridge waveguide ports and the four ridge circular waveguide form a 45 ° rotation relationship.
The middle coupling structure part of the 45-degree corner ultra-wideband cross coupler is provided with a conical matching structure, and meanwhile, between two-stage four-ridge circular waveguides and four single-ridge waveguides, four triangular ridges parallel to the four single-ridge waveguides are loaded through a circular waveguide four-ridge transition section, a small-ridge rectangular waveguide matching section, so that an 8-ridge-like structure is formed in a core coupling local area, the performance that after four single-ridge waveguides are combined into four-ridge circular waveguides, linear polarization electromagnetic wave signals are decomposed into two mutually orthogonal 45-degree linear polarization signals is well achieved, 45-degree linear polarization feeding of the four-ridge waveguides is achieved, and the bottleneck problem of 45-degree linear polarization feeding is solved.
Fig. 4 is a schematic structural diagram of a 45 ° corner ultra-wideband cross-shaped coupler provided in the embodiments of the present disclosure, and fig. 5 is a graph of simulation results of the 45 ° corner ultra-wideband cross-shaped coupler provided in the embodiments of the present disclosure, where it can be seen that the return loss of the four-ridge circular waveguide port is less than 20dB in the wideband range of 36.5-87 ghz.
In an alternative embodiment of the present disclosure, the four-ridged-round waveguide structure of the common port 101 of the cross-shaped coupler includes a cone structure 103 that is a cone structure.
The four-ridge circular waveguide structure of the common port 101 of the cross coupler comprises a conical structure 103, wherein the conical structure 103 is a conical structure, four ridges of the common port 101 in the cross coupler form 45-degree corners with the single ridge 105 of each coupling port 102 respectively, 45-degree linear polarization feeding of the four-ridge circular waveguide is realized, good circular polarization performance in ultra-wide frequency bands is realized, and the four-ridge circular waveguide structure is a key component for realizing circular polarization performance.
In an alternative embodiment of the present description, the common port 101 is connected to the ridge structure transition using a bevel structure that fits into a conical structure.
The four-ridge circular waveguide structure comprises a middle cone structure 103 and a four-ridge structure 104 adapting to the cone structure 103, wherein the four-ridge structure 104 is a special optimized structure: the inclined plane structure is shown in fig. 1, and fig. 1 is a three-dimensional structure diagram of an ultra-wideband cross coupler provided in the embodiment of the present specification, and by means of the design, good ultra-wideband matching performance with four single-ridge waveguide structures can be achieved.
The feed source component comprises the cross-shaped coupler, and can further comprise: horn, phase shifter, power divider. The cross-shaped coupler comprises a first cross-shaped coupler, a twenty-first coupler and a thirty-first coupler.
The first cross-shaped coupler, the twenty-first coupler and the thirty-first coupler all comprise a common port 101 of a four-ridge circular waveguide structure and coupling ports 102 of four single-ridge waveguide structures, wherein the four-ridge circular waveguide structure comprises a cone structure 103 and a four-ridge structure 104 adapting to the cone structure 103; four ridges of a common port 101 in the first cross-shaped coupler and the thirty-first shaped coupler are respectively arranged opposite to a single ridge 105 of each coupling port 102; four ridges of the common port 101 in the twenty-first coupler form 45-degree angles with the single ridge 105 of each coupling port 102;
the cross coupler comprises a public port 101 of a four-ridge circular waveguide structure and coupling ports 102 of four single-ridge waveguide structures, the bottom of the public port 101 is connected with the coupling ports 102 of the four single-ridge waveguide structures, the four-ridge circular waveguide structure comprises a cone structure 103 and a four-ridge structure 104 adapting to the cone structure 103, the four-ridge structure 104 and the single ridges 105 of the four coupling ports 102 are arranged according to a preset angle, therefore, the cross coupler can achieve good ultra-wideband matching performance between the public port 101 of the four-ridge circular waveguide structure and the coupling ports 102 of the four single-ridge waveguide structures, and the cross coupler has good matching performance in a wideband range with a relative bandwidth reaching 84.6% (36.5 GHz-90 GHz). Therefore, the cross-shaped coupler provided by the embodiments of the present specification may also be referred to as an ultra-wideband cross-shaped coupler. Specifically, the four-ridge circular waveguide structure of the common port 101 of the first cross-shaped coupler and the thirty-first coupler comprises a cone structure 103 which is a rectangular pyramid structure; the four-ridge circular waveguide structure of the common port 101 of the twenty-first coupler comprises a conical structure 103, the four ridges of the common port 101 in the twenty-first coupler form 45-degree corners with the single ridge 105 of each coupling port 102, 45-degree linear polarization feeding of the four-ridge circular waveguide is achieved, and good circular polarization performance in ultra-wideband is achieved by combining a ridge waveguide phase shifter, so that the four-ridge circular waveguide structure is a key component for achieving circular polarization performance.
Fig. 6 is an overall structure diagram of a feed source assembly provided in an embodiment of the present disclosure. The entire feed assembly can be divided into two major parts: a four-ridge circular waveguide broadband horn 8 and an ultra-wideband circular polarization feed source network 9. Because the feed source component has high working frequency and small inner cavity structure, in structural design, except for the four-ridge circular waveguide broadband loudspeaker 8, the ultra-wideband circularly polarized feed source network 9 adopts a layer-cut design mode, and fig. 7 is a connection relation diagram of all components in the feed source component provided by the embodiment of the present specification, wherein the right side structures (central parts) of the first component 1 and the second component 2 form an ultra-wideband cross coupler; the left side structure of the second component 2 and the right side structure (center portion) of the third component 3 form a 45-degree corner ultra-wideband cross coupler; the left-hand structure of the first member 1, the right-hand structure of the second member 2 and the third member 3 (without the center portion, only the four arms of the cross structure) constitute an ultra wideband phase shifter. The left side structure of the third component 3 and the right side structure (central portion) of the fourth component 4 constitute another ultra-wideband cross coupler, the left side structure of the fourth component 4 and the fifth component 5 constitute one ultra-wideband ridge waveguide T power divider, and the left side structure of the sixth component 6 and the seventh component 7 constitute another ultra-wideband ridge waveguide T power divider.
In order to realize QVE broadband dual circular polarization transceiving sharing, the feed source assembly of the embodiment of the specification is provided by designing a four-ridge circular waveguide broadband loudspeaker 8 and an ultra-wideband circular polarization feed source network 9. The ridge waveguide structure is adopted in the design, so that the working bandwidth of a main mode of the feed source assembly is expanded. By reasonably selecting the ridge waveguide size, the low-frequency end of the working frequency band is guaranteed to be free from cutoff, and the high-frequency band has good high-order mode inhibition performance. The feed source design avoids the adoption of the traditional hierarchical coupling technical scheme, adopts the design scheme of cascading ultra-wideband, ultra-wideband shifter, 45-degree corner ultra-wideband and ultra-wideband ridge waveguide power divider, and finally realizes the separation of QVE four-frequency-band signals through a multiplexer.
The cross coupler adopts a ridge waveguide structure, so that the main mode working bandwidth of the feed source assembly is expanded; the four-ridge circular waveguide structures in the first cross-shaped coupler, the twenty-first coupler and the thirty-second coupler comprise a rectangular pyramid structure and a four-ridge structure 104 adapting to the rectangular pyramid structure, and four ridges of the common port 101 in the first cross-shaped coupler and the thirty-first coupler are respectively arranged opposite to the single ridge 105 of each coupling port 102, so that good ultra-wideband matching performance between the common port 101 of the four-ridge circular waveguide structure and the coupling ports 102 of the four single-ridge waveguide structures can be realized; four ridges of a common port in the twenty-first coupler form 45-degree angles with single ridges 105 of each coupling port 102, 45-degree linear polarization feeding of four-ridge circular waveguides is achieved, and good circular polarization performance in ultra-wide frequency bands is achieved by combining ridge waveguide phase shifters. Therefore, the feed source component designed by the specification can cover an ultra-wideband range and has good performance in the wideband range.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Herein, "equal," "same," etc. are not strictly mathematical and/or geometric limitations, but also include deviations that may be appreciated by those skilled in the art and allowed by fabrication or use, etc.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Unless otherwise indicated, numerical ranges herein include not only the entire range within both of its endpoints, but also the several sub-ranges contained therein.
While the preferred embodiments and examples of the present application have been described in detail with reference to the accompanying drawings, the present application is not limited to the embodiments and examples described above, and various changes may be made within the knowledge of those skilled in the art without departing from the spirit of the present application.
The preferred embodiments of the present specification disclosed above are merely used to help clarify the present specification. Alternative embodiments are not intended to be exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the disclosure and the practical application, to thereby enable others skilled in the art to best understand and utilize the disclosure. This specification is to be limited only by the claims and the full scope and equivalents thereof.
Claims (11)
1. The cross coupler is characterized by comprising a public port of a four-ridge circular waveguide structure and coupling ports of four single-ridge waveguide structures, wherein the bottom of the public port is connected with the four coupling ports, the four-ridge circular waveguide structure comprises a cone structure and four ridges matched with the cone structure, and the four ridges and the single ridges of the four coupling ports are arranged according to a preset rotation angle.
2. The cross-shaped coupler of claim 1 wherein a ridge structure transition is provided between the common port and the coupling port; the ridge structure transition section comprises a multi-ridge waveguide transition section and a single-ridge waveguide transition section, wherein the multi-ridge waveguide transition section is arranged below the public port, the multi-ridge waveguide transition section is provided with ridges opposite to four ridges of the public port, the single-ridge waveguide transition section is arranged at the joint of the multi-ridge waveguide transition section and the coupling port, and the ridges of the single-ridge waveguide transition section are opposite to the ridges of the coupling port.
3. The cross-shaped coupler of claim 2 wherein four ridges of a common port in the cross-shaped coupler are each disposed opposite a single ridge of each coupled port.
4. A cross-shaped coupler according to claim 3, wherein the multi-ridge waveguide transition in the cross-shaped coupler is a square four-ridge waveguide transition.
5. The cross-shaped coupler of claim 3 or 4 wherein the four-ridged-round-waveguide structure of the common port of the cross-shaped coupler comprises a pyramid structure that is a quadrangular pyramid structure.
6. The cross-shaped coupler of claim 5 wherein the common port connects to the spine structure transition with a chamfer structure that mates with the rectangular pyramid structure.
7. The cross-shaped coupler of claim 2 wherein four ridges of a common port in the cross-shaped coupler are each at a 45 ° angle to a single ridge of each coupled port.
8. The cross-shaped coupler of claim 7 wherein the multi-ridge waveguide transition in the cross-shaped coupler is a circular waveguide transition, and the circular waveguide transition is provided with triangular ridges opposite the ridges of the coupling port.
9. The cross-shaped coupler of claim 7 or 8 wherein the four-ridged circular waveguide structure of the common port of the cross-shaped coupler comprises a conical structure.
10. The cross-shaped coupler of claim 9 wherein the common port connects to the spine structure transition section with a ramp structure that mates with the conical structure.
11. A feed assembly comprising a cross-shaped coupler as claimed in any one of claims 1 to 10.
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| CN202310845720.7A CN116565502B (en) | 2023-07-11 | 2023-07-11 | Cross coupler and feed source assembly |
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| CN116565502B (en) | 2023-09-22 |
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