QV-band broadband dual-circularly-polarized high-isolation feed source

Abstract

The invention discloses a QV frequency band broadband dual-circularly-polarized high-isolation feed source, and belongs to the field of satellite communication. Comprising a QV frequency band feed source horn, a QV frequency band broadband circular polarizer, a square-circular converter, a QV frequency band orthogonal mode coupler, a bent waveguide, a twisted waveguide, a first branch waveguide, a second branch waveguide, a Q frequency band filter and a V frequency band filter. According to the invention, Q-band and V-band broadband dual-polarization work is realized by adopting the QV-band orthogonal mode coupler, Q-band and V-band broadband dual-polarization work is realized by adopting the QV-band broadband circular polarizer, high channel isolation is realized by adopting the filter, and the transceiving isolation is greater than 90dB.

Description

Technical Field

[0001] The present invention relates to the technical field of satellite communications, and in particular to a QV frequency band broadband dual circular polarization high isolation feed source. Background Art

[0002] At present, Ka, K, Ku, X, C, and S band antennas are already common in satellite-borne applications, but most existing antennas operate at a single frequency and have a narrow bandwidth. With the development of antenna technology, multi-band composite antennas have been widely used, achieving improved antenna functions and reduced costs. However, with the substantial increase in satellite-borne data rates, higher requirements are placed on data transmission rates. QV band antennas have a wider communication bandwidth and have become the preferred solution for satellite-borne high-speed data transmission applications. Summary of the Invention

[0003] The present invention provides a QV band broadband dual circular polarization high isolation feed source, which can realize simultaneous operation of the Q band and the V band, with an isolation between the bands greater than 90dB and an axial ratio less than 1.5dB, realizing simultaneous operation of the QV dual bands with large bandwidth, greatly improving the communication capacity.

[0004] The embodiment of the present invention provides a QV band broadband dual circular polarization high isolation feed, including: a QV band feed horn, a QV band broadband circular polarizer, a square-circular conversion, a QV band orthogonal mode coupler, a bent waveguide, a twisted waveguide, a first branch waveguide, a second branch waveguide, a Q band filter, and a V band filter;

[0005] In which, the QV-band feed horn is connected to the input port of the QV-band broadband circular polarizer, the output port of the QV-band broadband circular polarizer is connected to the circular waveguide port of the square-circular conversion, the square waveguide port of the square-circular conversion is connected to the input port of the QV-band orthogonal mode coupler, the Q-band output port of the QV-band orthogonal mode coupler is connected to one end of the bent waveguide, the V-band output port is connected to one end of the twisted waveguide, the other end of the bent waveguide is connected to the first input port of the first branch waveguide, the other end of the twisted waveguide is connected to the second input port of the first branch waveguide, the output port of the first branch waveguide is connected to the input port of the second branch waveguide, and the first output port and the second output port of the second branch waveguide are respectively connected to the Q-band filter and the V-band filter.

[0006] Optionally, in one embodiment of the present invention, the QV dual-frequency feed horn includes a circular waveguide section, a light wall section and a transverse slot section, and the input port of the QV band broadband circular polarizer is connected to the QV dual-frequency feed horn via a screw.

[0007] Optionally, in one embodiment of the present invention, the QV band broadband circular polarizer is a metal diaphragm structure.

[0008] Optionally, in one embodiment of the present invention, the installation direction of the QV band broadband circular polarizer is rotated 90 degrees, so that the left-handed and right-handed circular polarizations of the Q band and the V band are changed.

[0009] The QV band broadband dual circularly polarized high isolation feed of the embodiment of the present invention realizes the simultaneous operation of QV dual-band broadband, and the circular polarization axial ratio within the bandwidth is less than 1.5dB. The high channel isolation of the Q and V bands is achieved through the QV band orthogonal mode coupler combined with the filter, and the isolation is greater than 90dB.

[0010] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0012] Figure 1 A structural diagram of a QV band broadband dual circular polarization high isolation feed according to an embodiment of the present invention;

[0013] Figure 2 This is a structural diagram of the QV dual-frequency feed speaker according to an embodiment of the present invention;

[0014] Figure 3 2 is a cross-sectional structural diagram of a QV band broadband circular polarizer according to an embodiment of the present invention;

[0015] Figure 4 2 is a cross-sectional structural diagram of a QV band orthogonal mode coupler according to an embodiment of the present invention;

[0016] Figure 5 is a cross-sectional structural diagram of a Q-band filter according to an embodiment of the present invention;

[0017] Figure 6 FIG. 4 is a cross-sectional structural diagram of a V-band filter according to an embodiment of the present invention.

[0018] Explanation of the accompanying symbols: 1-QV band feed horn; 2-QV band broadband circular polarizer; 3-square-circular conversion; 4-QV band orthogonal mode coupler; 5-bend waveguide; 6-twist waveguide; 7-first branch waveguide; 8-second branch waveguide; 9-Q band filter; 10-V band filter. DETAILED DESCRIPTION

[0019] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0020] Figure 1 This is a structural diagram of a QV band broadband dual circular polarization high isolation feed provided according to an embodiment of the present invention.

[0021] like Figure 1 As shown, the QV band broadband dual circular polarization high isolation feed includes: a QV band feed horn 1, a QV band broadband circular polarizer 2, a square-circular conversion 3, a QV band orthogonal mode coupler 4, a bent waveguide 5, a twisted waveguide 6, a first branch waveguide 7, a second branch waveguide 8, a Q band filter 9 and a V band filter 10.

[0022] Among them, the QV band feed horn 1 is connected to the input port of the QV band broadband circular polarizer 2, the output port of the QV band broadband circular polarizer 2 is connected to the circular waveguide port of the square-circular conversion 3, the square waveguide port of the square-circular conversion 3 is connected to the input port of the QV band orthogonal mode coupler 4, the Q band output port of the QV band orthogonal mode coupler 4 is connected to one end of the bent waveguide 5, the V band output port is connected to one end of the twisted waveguide 6, the other end of the bent waveguide 5 is connected to the first input port of the first branch waveguide 7 shown, the other end of the twisted waveguide 6 is connected to the second input port of the first branch waveguide 7, the output port of the first branch waveguide 7 is connected to the input port of the second branch waveguide 8, and the first output port and the second output port of the second branch waveguide 8 are respectively connected to the Q band filter 9 and the V band filter 10.

[0023] The QV band broadband dual circularly polarized high isolation feed of the embodiment of the present invention can realize a broadband, dual polarized, high isolation feed network operating simultaneously in the QV band, and is particularly suitable for compact communication antennas on satellite-borne platforms.

[0024] In one embodiment of the present invention, a QV band orthogonal mode coupler realizes frequency separation of the Q band and the V band, realizes simultaneous wideband operation of the Q band and the V band, and is used in conjunction with a QV band broadband circular polarizer to realize dual circular polarization of Q band and V band transmission and reception.

[0025] In one embodiment of the present invention, Figure 2 As shown, the QV dual-frequency feed horn is a transverse groove corrugated horn, including a circular waveguide section, a light wall section and a transverse groove section. The input port of the QV band broadband circular polarizer is connected to the QV dual-frequency feed horn through screws.

[0026] In one embodiment of the present invention, Figure 3As shown in FIG, the QV band broadband circular polarizer is a metal diaphragm structure.

[0027] In one embodiment of the present invention, Figure 4 As shown, the QV band orthogonal mode coupler has one input port, one Q band output port, and one V band output port. The input port of the QV band orthogonal mode coupler is connected to the QV band broadband circular polarizer through a square-circular conversion and a screw.

[0028] In one embodiment of the present invention, by rotating the installation direction of the QV band broadband circular polarizer by 90 degrees, the left-hand and right-hand circular polarization of the Q band and V band are changed, and the free conversion of the left-hand and right-hand circular polarization of the QV band can be achieved.

[0029] In one embodiment of the present invention, Figure 5 and Figure 6 As shown in FIG, filters are used to achieve high channel isolation, and the Q-band filter and the V-band filter achieve a transmit-receive isolation of > 90dB.

[0030] The QV-band broadband dual circularly polarized high-isolation feed in the embodiments of the present invention enables simultaneous QV dual-band broadband operation, significantly improving communication capacity. This invention achieves QV-band port isolation greater than 90dB, effectively reducing interference when dual-band transmission and reception are operating simultaneously. This invention also achieves a QV dual-band circularly polarized axial ratio less than 1.5dB, addressing the issue of high antenna axial ratios when operating simultaneously with multiple frequencies.

[0031] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "N" means at least two, such as two, three, etc., unless otherwise specifically defined.

Claims

1. A QV band broadband dual circular polarization high isolation feed, characterized in that: include: QV band feed horn, QV band broadband circular polarizer, square-circular conversion, QV band orthogonal mode coupler, bent waveguide, twisted waveguide, first branch waveguide, second branch waveguide, Q band filter and V band filter; In which, the QV-band feed horn is connected to the input port of the QV-band broadband circular polarizer, the output port of the QV-band broadband circular polarizer is connected to the circular waveguide port of the square-circular conversion, the square waveguide port of the square-circular conversion is connected to the input port of the QV-band orthogonal mode coupler, the Q-band output port of the QV-band orthogonal mode coupler is connected to one end of the bent waveguide, the V-band output port is connected to one end of the twisted waveguide, the other end of the bent waveguide is connected to the first input port of the first branch waveguide, the other end of the twisted waveguide is connected to the second input port of the first branch waveguide, the output port of the first branch waveguide is connected to the input port of the second branch waveguide, and the first output port and the second output port of the second branch waveguide are respectively connected to the Q-band filter and the V-band filter.

2. The QV band broadband dual circular polarization high isolation feed according to claim 1, characterized in that: The QV dual-frequency feed horn includes a circular waveguide section, a light wall section and a transverse slot section, and the input port of the QV band broadband circular polarizer is connected to the QV dual-frequency feed horn through a screw.

3. The QV band broadband dual circular polarization high isolation feed according to claim 1, characterized in that: The QV band broadband circular polarizer is a metal diaphragm structure.

4. The QV band broadband dual circular polarization high isolation feed according to claim 1, characterized in that: By rotating the installation direction of the QV band broadband circular polarizer by 90 degrees, the left-handed and right-handed circular polarizations of the Q band and the V band are changed.

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