CN111900513B - Orthogonal mode converter, antenna device and communication system - Google Patents
Orthogonal mode converter, antenna device and communication system Download PDFInfo
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- CN111900513B CN111900513B CN202010923350.0A CN202010923350A CN111900513B CN 111900513 B CN111900513 B CN 111900513B CN 202010923350 A CN202010923350 A CN 202010923350A CN 111900513 B CN111900513 B CN 111900513B
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- 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
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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
- H01P5/16—Conjugate devices, i.e. devices having at least one port decoupled from one other port
- H01P5/19—Conjugate devices, i.e. devices having at least one port decoupled from one other port of the junction type
- H01P5/20—Magic-T junctions
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
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Abstract
The embodiment of the disclosure provides an orthogonal mode converter, antenna equipment and a communication system. The orthogonal mode converter includes: the magic T comprises a first waveguide body and a first partition plate positioned in the first waveguide body, wherein the first waveguide body is provided with an E-surface port, an H-surface port, a first connecting port and a second connecting port, the first connecting port and the second connecting port are positioned on the same plane, the plane where the first connecting port and the second connecting port are positioned is parallel to the plane where the E-surface port is positioned, and the plane where the first partition plate is positioned is orthogonal to the plane where the E-surface port is positioned and the plane where the H-surface port is positioned; the polarizer comprises a second waveguide body and a second partition plate positioned in the second waveguide body, the second waveguide body is provided with a third connecting port, a fourth connecting port and a public port, the third connecting port and the fourth connecting port are respectively connected with the first connecting port and the second connecting port, the plane where the public port is located is parallel to the plane where the E-face port is located, and the plane where the second partition plate is located is orthogonal to the plane where the E-face port is located and the plane where the H-face port is located.
Description
Technical Field
The present disclosure relates to the field of communications devices, and in particular, to an orthogonal-mode converter, an antenna device, and a communications system.
Background
With the continuous upgrade and development of duplex communication technology, available frequency bands are increasingly tense, and how to realize same-frequency multiplexing, namely, how to realize multiple utilization of the same frequency band, becomes a research focus. In this context, polarization multiplexing techniques have come to work, which refer to: two paths of mutually isolated polarized signals are transmitted in the same frequency band range, and the two paths of electromagnetic wave signals are received, separated and output by using a dual-polarized antenna at a receiving end. Therefore, an important component to be used in the antenna feed is an orthogonal-mode Transducer (OMT). By the polarization multiplexing technology, double utilization of frequency band resources can be realized, and the technical application prospect is very wide.
For the orthogonal mode converter, how to improve the compactness of the structure of the orthogonal mode converter on the premise of meeting the requirements of broadband and high isolation is a key focus of current research and development.
Disclosure of Invention
The embodiment of the disclosure provides an orthogonal mode converter, an antenna device and a communication system, so as to meet the use requirements of the orthogonal mode converter on wide operating frequency band, high isolation and high compactness.
According to an aspect of an embodiment of the present disclosure, there is provided an orthogonal mode converter including:
the magic T comprises a first waveguide body and a first partition plate positioned in the first waveguide body, wherein the first waveguide body is provided with an E-surface port, an H-surface port, a first connecting port and a second connecting port, the plane of the E-surface port is orthogonal to the plane of the H-surface port, the first connecting port and the second connecting port are positioned on the same plane and are parallel to the plane of the E-surface port, and the plane of the first partition plate is orthogonal to the plane of the E-surface port and the plane of the H-surface port;
the polarizer comprises a second waveguide body and a second partition plate located in the second waveguide body, the second waveguide body is provided with a third connecting port, a fourth connecting port and a public port, the third connecting port and the fourth connecting port are located on the same plane and are parallel to the plane where the E-face port is located, the third connecting port is connected with the first connecting port, the fourth connecting port is connected with the second connecting port, the plane where the public port is located is parallel to the plane where the E-face port is located, and the plane where the second partition plate is located is orthogonal to the plane where the E-face port is located and the plane where the H-face port is located.
In some embodiments, the first waveguide comprises a vertically connected E-arm and H-arm, wherein:
the E-surface port is positioned at one end of the E-arm, and the E-arm comprises a first side wall, a second side wall, a third side wall and a fourth side wall which surround the E-surface port and are sequentially connected;
the H face port is located one end of the H arm, the H arm comprises a fifth side wall, a sixth side wall, a seventh side wall and an eighth side wall, the fifth side wall, the sixth side wall and the eighth side wall surround the H face port and are connected in sequence, the fifth side wall is connected with the first side wall, the sixth side wall is connected with the second side wall, the eighth side wall is connected with the fourth side wall, and the first connecting port and the second connecting port are located on the seventh side wall.
In some embodiments, the first and third sidewalls are each planar, and the second and fourth sidewalls are each ridged and mirror-imaged in structure;
the fifth side wall is in a ridge shape, the sixth side wall and the eighth side wall are in a plane shape, and the seventh side wall is in a plane shape or a step shape.
In some embodiments, the second waveguide is a rectangular waveguide, the third connection port and the fourth connection port are both rectangular in shape and the same size, and the common port is rectangular in shape.
In some embodiments, the first partition board is in a multi-step ladder shape and extends into the E arm and the H arm, and the step heights of the first partition board are sequentially increased along the direction far away from the port of the E surface;
the second partition board is in a multi-step ladder shape with the same number of steps as the first partition board, and the step heights of the second partition board are sequentially reduced along the direction away from the port of the E surface.
In some embodiments, the first partition and the second partition are each four-step stepped.
In some embodiments, the E-plane port is an E-plane input port, the H-plane port is an H-plane input port, and the common port is a common output port.
In some embodiments, the E-plane port is an E-plane output port, the H-plane port is an H-plane output port, and the common port is a common input port.
According to another aspect of the embodiments of the present disclosure, there is provided an antenna apparatus including the orthomode converter according to any one of the embodiments.
According to still another aspect of an embodiment of the present disclosure, there is provided a communication system including the antenna apparatus of the foregoing embodiment.
According to the orthomode converter disclosed by the embodiment of the disclosure, the first connection port and the second connection port are located on the same plane, and the plane where the first connection port and the second connection port are located is parallel to the plane where the E-plane port is located, so that the first connection port and the second connection port are compactly arranged and are respectively connected with the third connection port and the fourth connection port of the partition plate polarizer, and the overall structure of the orthomode converter can be compact. Compared with the traditional symmetric structure type orthogonal mode converter, the orthogonal mode converter of the embodiment of the disclosure is realized by using the folding magic T structure and the partition polarizer, so that the orthogonal mode converter has the technical advantages of compact structure and small volume.
In addition, the polarizer and the magic T are cascaded to form the orthogonal mode converter, and due to the symmetrical structure of the magic T, the high isolation characteristic of the port can be realized. Compared with the conventional asymmetric structure type orthogonal mode converter, the orthogonal mode converter of the embodiment of the disclosure has higher isolation and wider working frequency band.
Of course, not all advantages described above need to be achieved at the same time by a product or method that implements any embodiment of the disclosure.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the related art, the drawings used in the description of the embodiments of the present disclosure or the related art are briefly introduced below. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty.
Fig. 1 is a schematic structural view of a magic T in the related art;
fig. 2 is a schematic structural diagram of an orthomode converter according to some embodiments of the present disclosure;
fig. 3 is a schematic structural view of a magic T according to some embodiments of the present disclosure;
FIG. 4 is a schematic diagram of a polarizer according to some embodiments of the present disclosure;
FIG. 5 is a graph of port reflection coefficient and transmission coefficient for an orthomode converter according to an embodiment of the disclosure within an operating frequency band;
fig. 6 is a graph of port isolation for an orthomode converter of an embodiment of the disclosure within an operating frequency band;
fig. 7 is a graph of polarization isolation of an orthomode converter of an embodiment of the disclosure within an operating frequency band.
Detailed Description
The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. All other embodiments, which can be derived by one of ordinary skill in the art from the embodiments disclosed herein without making any creative effort, shall fall within the scope of protection of the present disclosure.
A quadrature-mode converter typically includes two isolated ports (E-plane and H-plane ports, respectively) and one common port. In the related art, the orthomode converters are classified into three types according to structural characteristics, namely, a double-symmetric structure type orthomode converter, a single-symmetric structure type orthomode converter, and an asymmetric structure type orthomode converter. Due to the characteristics of symmetry of the structure of the double-symmetrical structure type orthogonal mode converter and the single-symmetrical structure type orthogonal mode converter, the requirements of broadband and high isolation can be met, and the double-symmetrical structure type orthogonal mode converter and the single-symmetrical structure type orthogonal mode converter are large in size and complex in structural design. Compared with the first two types of orthogonal mode converters, the asymmetric structure type orthogonal mode converter can be simplified in structural design, the size can be relatively smaller, but the asymmetric structure type orthogonal mode converter has a narrower working frequency band and isolation performance which is not the same as that of the first two types of orthogonal mode converters.
The embodiment of the disclosure provides an orthogonal mode converter, an antenna device and a communication system, so as to meet the use requirements of wide operating frequency band, high isolation and high compactness of the orthogonal mode converter.
An element that branches electromagnetic wave energy from a main waveguide is called a waveguide splitter, which is one type of microwave power distribution device. The waveguide splitter comprises an E-T branch type waveguide splitter, an H-T branch type waveguide splitter and a matching double-T type waveguide splitter according to different branch designs. The E-T branch is a branch constructed on the wide side surface of the main waveguide, the axis of the E-T branch is parallel to the direction of an electric field of the main waveguide for transmitting electromagnetic waves, and the E-T branch is equivalent to the branch waveguide and the main waveguide which are connected in series. The H-T branch is a branch constructed on a narrow side surface of the main waveguide, and the axis thereof is parallel to the magnetic field direction of the main waveguide transmitting the electromagnetic wave, and corresponds to a branch line parallel to the main waveguide. Matching double T, also known as magic T, structurally merges the E-T branch and the H-T branch.
As shown in fig. 1, in the related art, the structure of the magic T includes a first port 01, a second port 02, a third port 03, and a fourth port 04, wherein the third port 03 and the fourth port 04 are symmetrically disposed.
When TE10 mode electromagnetic waves are input into the first port 01, TE10 mode electromagnetic waves with equal amplitude and the same phase are output from the third port 03 and the fourth port 04; when TE10 mode electromagnetic waves are input to the second port 02, TE10 mode electromagnetic waves of equal amplitude and opposite phase are output from the third port 03 and the fourth port 04. When TE10 mode electromagnetic waves with equal amplitude and same phase are input into the third port 03 and the fourth port 04, TE10 mode electromagnetic waves are output from the first port 01; when the TE10 mode electromagnetic waves with equal amplitude and opposite phase are input to the third port 03 and the fourth port 04, a TE10 mode electromagnetic wave is output from the second port 02. The TE wave is a transverse electric wave, and the direction of an electric field in the electromagnetic wave is perpendicular to the propagation direction of the electromagnetic wave. TEmn refers to the wave mode of the transverse electric wave, where m, n represent the number of half cycles of the electromagnetic field varying in the direction of the broad side and the narrow side of the rectangular waveguide, respectively. The TE10 mode electromagnetic wave is the dominant wave in a rectangular waveguide, and is the most important wave in a rectangular waveguide.
As shown in fig. 2, 3 and 4, some embodiments of the present disclosure provide a quadrature-mode converter, including:
the magic T1 comprises a first waveguide 10 and a first partition board 11 positioned in the first waveguide 10, wherein the first waveguide 10 is provided with an E-face port 12 (the E face refers to a plane parallel to the direction of an electric field and is also called an electric face), an H-face port 13 (the H face refers to a plane parallel to the direction of a magnetic field and is also called a magnetic face), a first connection port 14 and a second connection port 15, wherein the plane of the E-face port 12 is orthogonal to the plane of the H-face port 13, the first connection port 14 and the second connection port 15 are positioned on the same plane and are parallel to the plane of the E-face port 12, and the plane of the first partition board 11 is orthogonal to both the plane of the E-face port 12 and the plane of the H-face port 13;
the polarizer 2 comprises a second waveguide body 20 and a second partition plate 21 located in the second waveguide body 20, wherein the second waveguide body 20 is provided with a third connection port 22, a fourth connection port 23 and a common port 24, the third connection port 22 and the fourth connection port 22 are located on the same plane, the plane of the third connection port 23 is parallel to the plane of the E-face port 12, the third connection port 22 is connected with the first connection port 14, the fourth connection port 23 is connected with the second connection port 15, the plane of the common port 24 is parallel to the plane of the E-face port 12, and the plane of the second partition plate 21 is orthogonal to both the plane of the E-face port 12 and the plane of the H-face port 13.
As can be seen from fig. 2, the orthogonal analog converter as a whole has three ports, i.e., an E-plane port 12, an H-plane port 13, and a common port 24. The first partition 11 divides the first waveguide 10 into two parts, with which the first connection port 14 and the second connection port 15 communicate correspondingly. The second partition 21 divides the second waveguide 20 into two parts, with which the third connection port and 22 the fourth connection port 23 communicate correspondingly.
In some embodiments of the present disclosure, the orthomode converter is used for a signal transmitting end, the E-plane port 12 is an E-plane input port, the H-plane port 13 is an H-plane input port, and the common port 24 is a common output port.
For example, when a path of TE10 mode electromagnetic wave is input into the E-face port 12 of the magic T1, the first connection port 14 and the second connection port 15 of the magic T1 generate electromagnetic wave signals with equal amplitude and in phase, the electromagnetic wave signals with equal amplitude and in phase are excited as input of the third connection port 22 and the fourth connection port 23 of the polarizer 2, and finally, the TE10 mode electromagnetic wave is output at the common port 24 of the polarizer 2.
When another TE10 mode electromagnetic wave is input into the H-face port 13 of the magic T1, the first connection port 14 and the second connection port 15 of the magic T1 generate equal-amplitude and opposite-phase electromagnetic wave signals, the equal-amplitude and opposite-phase electromagnetic wave signals are input and excited as the third connection port 22 and the fourth connection port 23 of the polarizer 2, and finally the TE01 mode electromagnetic wave is output from the common port 24 of the polarizer 2.
In some embodiments of the present disclosure, the orthomode converter is used for a signal receiving end, the common port 24 is a common input port, the E-plane port 12 is an E-plane output port, and the H-plane port 13 is an H-plane output port.
For example, when TE10 mode electromagnetic wave is inputted to the common port 24 of the polarizer 2, two electromagnetic wave signals of equal amplitude and in phase are generated by the separation action of the second partition 21, and the two electromagnetic wave signals of equal amplitude and in phase are inputted from the first connection port 14 and the second connection port 15 into the magic T1 and then outputted from the E-face port 12.
When TE01 mode electromagnetic wave is inputted to the common port 24 of the polarizer 2, two equal amplitude and opposite phase electromagnetic wave signals are generated by the separation action of the second partition plate 21, and the two equal amplitude and opposite phase electromagnetic wave signals are inputted to the magic T1 from the first connection port 14 and the second connection port 15 and then outputted from the H-plane port 13.
According to the orthomode converter disclosed by the embodiment of the disclosure, the first connection port and the second connection port are located on the same plane, and the plane where the first connection port and the second connection port are located is parallel to the plane where the E-plane port is located, so that the first connection port and the second connection port are compactly arranged and are respectively connected with the third connection port and the fourth connection port of the partition plate polarizer, and the overall structure of the orthomode converter can be compact. Compared with the traditional symmetric structure type orthogonal mode converter, the orthogonal mode converter of the embodiment of the disclosure is realized by using the folding magic T structure and the partition polarizer, so that the orthogonal mode converter has the technical advantages of compact structure and small volume.
In addition, the polarizer and the magic T are cascaded to form the orthogonal mode converter, and due to the symmetrical structure of the magic T, the high isolation characteristic of the port can be realized. Compared with the conventional asymmetric structure type orthogonal mode converter, the orthogonal mode converter of the embodiment of the disclosure has higher isolation and wider working frequency band.
The specific structural form of the first waveguide 10 is not limited. In some embodiments, as shown in fig. 2, the first waveguide 10 includes a vertically connected E-arm 10E and H-arm 10H, wherein: the E-face port 12 is located at one end of the E-arm 10E, and the E-arm 10E includes a first sidewall 101, a second sidewall 102, a third sidewall 103, and a fourth sidewall 104 surrounding the E-face port 12 and connected in sequence; the H-face port 13 is located at one end of the H-arm 10H, and the H-arm 10H includes a fifth sidewall 105, a sixth sidewall 106, a seventh sidewall 107, and an eighth sidewall 108 which surround the H-face port and are connected in sequence, where the fifth sidewall 105 is connected to the first sidewall 101, the sixth sidewall 106 is connected to the second sidewall 102, the eighth sidewall 108 is connected to the fourth sidewall 104, and the first connection port 14 and the second connection port 15 are located at the seventh sidewall 107.
As shown in fig. 2, in this embodiment, the first sidewall 101 and the third sidewall 103 are respectively planar, and the second sidewall 102 and the fourth sidewall 104 are respectively ridge-shaped and mirror-image in structure; the fifth side wall 105 is ridged, the sixth side wall 106 and the eighth side wall 108 are flat, and the seventh side wall 107 is flat. In other embodiments, the seventh side wall 107 may also be ridged.
The specific structural form of the second waveguide 20 is not limited. In some embodiments, the second waveguide 20 is a rectangular waveguide, the third connection port 22 and the fourth connection port 23 are both rectangular in shape and the same size, and the common port 24 is rectangular in shape.
As shown in fig. 2, in some embodiments, the first partition 11 is in a multi-step shape and extends into the E arm 10E and the H arm 10H, and the step heights of the first partition 11 increase in sequence in a direction away from the E-face port 12; the second partition plate 21 is in a multi-step shape having the same number of steps as the first partition plate 11, and the heights of the steps of the second partition plate 21 are sequentially reduced in the direction away from the E-face port 12.
The specific number of steps of the first partition plate 11 and the second partition plate 21 is not limited, and in one embodiment, the first partition plate 11 and the second partition plate 21 are respectively in a four-step shape.
The ridge or step structure design of the first waveguide 10, the first partition 11 and the second partition 21 is used to achieve impedance matching and reduce power reflection, so as to obtain better device effect. In other embodiments of the present disclosure, the E-arm and the H-arm may also be in the shape of regular rectangular waveguides.
As shown in fig. 5, fig. 6 and fig. 7, where fig. 5 is a graph of port reflection coefficient and transmission coefficient of the orthomode converter in the working frequency band according to the embodiment of the present disclosure, fig. 6 is a graph of port isolation of the orthomode converter in the working frequency band according to the embodiment of the present disclosure, and fig. 7 is a graph of polarization isolation of the orthomode converter in the working frequency band according to the embodiment of the present disclosure.
In the figure, the S parameter is a parameter based on the relationship between the incident electromagnetic wave and the reflected electromagnetic wave. In the curve example S a (c), b, (d), a, b denote ports, E-plane port is denoted by the number 1, H-plane port is denoted by the number 2, and common port is denoted by the number 3; c and d respectively represent the electromagnetic wave patterns of the a port and the b port, the TE10 is represented by the numeral 1, and the TE01 is represented by the numeral 2. Wherein S1(1)1(1) is input reflection coefficient of the E-plane port, S1(1)3(1) is transmission coefficient from the E-plane port to the common port, S2(1)2(1) is input reflection coefficient of the H-plane port, S2(1)3(2) is transmission coefficient from the H-plane port to the common port, S1(1)2(1) is port isolation coefficient, S1(1)3(2) is polarization isolation from the E-plane port to the common port, and S2(1)3(1) is polarization isolation from the H-plane port to the common port.
As can be seen from the figure, the port reflection coefficient of the orthogonal mode converter in the working frequency band of the embodiment of the disclosure is below-15 dB, the transmission coefficient is near 0dB, the port isolation is below-48 dB, the polarization isolation is below-57 dB, and the working bandwidth is 20%. In the existing OMT design, the OMT with an asymmetric structure has a simple structure, but the polarization isolation is basically about-40 dB, and the working bandwidth is about 10%; in the OMT with the double-symmetrical structure, the polarization isolation degree of-50 dB and the working bandwidth of 30% can be realized, but the structure size is overlarge, so that the miniaturization of equipment is not facilitated; the OMT with a single symmetrical structure can realize 25% of working bandwidth, but the structure is complex, and the polarization isolation can only be realized below-40 dB. Therefore, compared with the orthomode converter with a double symmetrical structure, the orthomode converter of the disclosed example has a simple structure and is beneficial to equipment miniaturization; compared with an orthomode converter with a single symmetrical structure, the isolation degree is better, and the structure is simpler; compared with an orthogonal mode converter with an asymmetric structure, the orthogonal mode converter has good isolation and wider operation bandwidth.
The embodiment of the present disclosure further provides an antenna device including the orthomode converter of any one of the foregoing embodiments. The orthogonal mode converter may be used for a circularly polarized antenna.
The embodiment of the present disclosure further provides a communication system including the antenna device of the foregoing embodiment. Including but not limited to radar communication systems.
Because the orthogonal mode converter has the advantages of wide working frequency band, high isolation and high compactness, the antenna equipment and the communication system also have better communication effect, and the utilization rate of frequency band resources is improved.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments.
The above description is only for the preferred embodiment of the present disclosure, and is not intended to limit the scope of the present disclosure. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure are included in the scope of protection of the present disclosure.
Claims (10)
1. An orthogonal-mode converter, comprising:
the magic T comprises a first waveguide body and a first partition plate positioned in the first waveguide body, wherein the first waveguide body is provided with an E-surface port, an H-surface port, a first connecting port and a second connecting port, the plane of the E-surface port is orthogonal to the plane of the H-surface port, the first connecting port and the second connecting port are positioned on the same plane and are parallel to the plane of the E-surface port, and the plane of the first partition plate is orthogonal to the plane of the E-surface port and the plane of the H-surface port;
the polarizer comprises a second waveguide body and a second partition plate located in the second waveguide body, the second waveguide body is provided with a third connecting port, a fourth connecting port and a public port, the third connecting port and the fourth connecting port are located on the same plane and are parallel to the plane where the E-face port is located, the third connecting port is connected with the first connecting port, the fourth connecting port is connected with the second connecting port, the plane where the public port is located is parallel to the plane where the E-face port is located, and the plane where the second partition plate is located is orthogonal to the plane where the E-face port is located and the plane where the H-face port is located.
2. The orthogonal mode converter of claim 1, wherein the first waveguide comprises a vertically connected E-arm and H-arm, wherein:
the E-surface port is positioned at one end of the E-arm, and the E-arm comprises a first side wall, a second side wall, a third side wall and a fourth side wall which surround the E-surface port and are sequentially connected;
the H face port is located one end of the H arm, the H arm comprises a fifth side wall, a sixth side wall, a seventh side wall and an eighth side wall, the fifth side wall, the sixth side wall and the eighth side wall surround the H face port and are connected in sequence, the fifth side wall is connected with the first side wall, the sixth side wall is connected with the second side wall, the eighth side wall is connected with the fourth side wall, and the first connecting port and the second connecting port are located on the seventh side wall.
3. The orthogonal mode converter according to claim 2,
the first side wall and the third side wall are respectively in a plane shape, and the second side wall and the fourth side wall are respectively in a ridge shape and are in mirror image structures;
the fifth side wall is in a ridge shape, the sixth side wall and the eighth side wall are in a plane shape, and the seventh side wall is in a plane shape or a step shape.
4. The orthogonal mode converter according to claim 2,
the second waveguide body is a rectangular waveguide body, the third connecting port and the fourth connecting port are both rectangular and the same in size, and the public port is rectangular.
5. The orthogonal mode converter according to claim 4,
the first partition plates are in a multi-step ladder shape and extend into the E arm and the H arm, and the step heights of the first partition plates are sequentially increased along the direction far away from the port of the E surface;
the second partition board is in a multi-step ladder shape with the same number of steps as the first partition board, and the step heights of the second partition board are sequentially reduced along the direction away from the port of the E surface.
6. The orthogonal mode converter according to claim 5, wherein the first partition and the second partition are respectively stepped in four steps.
7. An orthomode converter according to any of claims 1 to 6, wherein the E-plane port is an E-plane input port, the H-plane port is an H-plane input port, and the common port is a common output port.
8. An orthomode converter according to any of claims 1 to 6, wherein the E-plane port is an E-plane output port, the H-plane port is an H-plane output port, and the common port is a common input port.
9. An antenna device, characterized in that it comprises a quadrature-mode converter according to any of claims 1-8.
10. A communication system, characterized in that it comprises an antenna device according to claim 9.
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| CN112864598B (en) * | 2021-01-12 | 2022-04-01 | 北京邮电大学 | Circularly polarized antenna suitable for millimeter wave communication and communication equipment |
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