KuKa double-frequency shipborne communication-in-motion antenna

Abstract

The utility model discloses a KuKa dual-frequency shipborne communication-in-motion antenna, which belongs to the technical field of antennas and comprises an antenna reflecting surface, a Ku / Ka integrated feed source, a Ku / Ka dual-frequency network, a Ku power amplifier, a Ka power amplifier and an antenna seat frame, and the Ku / Ka integrated feed source is connected with the Ku / Ka dual-frequency network; the antenna adopts the design of a Ku / Ka integrated feed source and a Ku / Ka double-frequency network, has the capability of Ku and Ka frequency band time-sharing and simultaneous working, does not need to disassemble and assemble the feed source and the network, adopts an integrated structure and is light in weight, and because the antenna pedestal adopts a four-axis structure of azimuth + roll + pitch + polarization rotation, the antenna pedestal is not required to be assembled and disassembled, and the antenna pedestal is not required to be assembled and disassembled. Tracking of target satellites of various orbits such as GEO, IGEO, medium orbit and low orbit can be kept in the moving process, the system is used for providing broadband and anti-interference satellite communication means between satellite communication-in-motion shipborne stations and shores, naval vessels, airplanes and the like, and over-the-horizon uninterrupted interactive transmission of voice, video and data is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of antennas, and in particular relates to a KuKa dual-frequency shipborne communication-in-motion antenna. Background Art

[0002] With the rapid development of modern mobile systems, seawater operations, seawater transportation crews and national marine security personnel have an urgent need to understand national current news and market dynamics, which makes maritime communications particularly important, and the demand for Ku / Ka dual-band antennas is becoming increasingly strong. Traditional dual-band communication antennas have the following limitations:

[0003] 1) Two opposing feed sources and networks are often used, and the feed source, network, and power amplifier need to be replaced manually, which is complicated and time-consuming to operate. The requirements for simultaneous use of Ku / Ka dual frequencies cannot be met in shipborne mobile antennas, and the structural design is cumbersome and bulky;

[0004] 2) Traditional antenna mounts can only rotate in azimuth and elevation, which cannot meet the harsh environment at sea;

[0005] 3) With the comprehensive upgrade of satellite systems, broadband communication of marine communication systems is imminent;

[0006] Therefore, a Ku / Ka dual-frequency shipborne in-motion antenna with a wide bandwidth that can track target satellites in multiple orbits such as GEO, IGEO, medium orbit, and low orbit during movement is needed to solve the above problems. Utility Model Content

[0007] The utility model aims to provide a KuKa dual-frequency shipborne mobile communication antenna to solve the problems raised in the above background technology.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a KuKa dual-frequency shipborne mobile communication antenna, comprising an antenna reflecting surface, a Ku / Ka integrated feed, a Ku / Ka dual-frequency network, a Ku power amplifier, a Ka power amplifier and an antenna mount, the Ku / Ka integrated feed is connected to the Ku / Ka dual-frequency network, the Ku / Ka dual-frequency network is connected in the antenna reflecting surface, and the Ku power amplifier, Ka power amplifier and antenna reflecting surface are all connected to the chassis of the antenna mount.

[0009] The Ku / Ka dual-frequency network includes a Ku / Ka splitter, a Ku rejection filter, a Ku rotating joint, a Ka broadband rotating joint, a Ka broadband circular polarizer, a Ka broadband orthogonal mode coupler, a Ka waveguide polarization switch, a Ka rejection filter and an LNB. The main channel of the Ku / Ka splitter has two circular waveguide ports, one end of the Ku / Ka splitter is connected to a Ku / Ka integrated feed source, the other end of the Ku / Ka splitter is connected to a Ka broadband rotating joint, the Ku transmitting port and the Ku receiving port on the side of the Ku / Ka splitter are respectively connected to the Ku rotating joint and the rejection filter, the other end of the Ka broadband rotating joint is connected to the Ka broadband circular polarizer, the other end of the Ka broadband circular polarizer is connected to the circular waveguide port of the Ka broadband orthogonal mode coupler, and the Ka waveguide polarization switch has four waveguide ports, two opposite waveguide ports are connected to two ports of the Ka broadband orthogonal mode coupler, and the other two ports are respectively connected to the Ka rejection filter and the LNB.

[0010] By setting the above structure, the antenna adopts the design of Ku / Ka integrated feed and Ku / Ka dual-frequency network, and has the ability to work in Ku and Ka frequency bands in time-sharing and simultaneously, without disassembling the feed and network, and the antenna surface adopts an integrated structure and is light in weight;

[0011] As a preferred implementation, the antenna mount adopts a four-axis architecture of azimuth + roll + pitch + polarization rotation.

[0012] By setting up the antenna mount, because the antenna mount adopts a four-axis structure of azimuth + roll + pitch + polarization rotation, the antenna can achieve an azimuth rotation angle of 360° infinite rotation, a pitch rotation angle of -15°~+120° (0° when the beam direction is horizontal), a roll rotation angle of ±30°, a Ku-line polarization rotation angle of ±90°, and the rotation speed of the four rotation axes can reach 100° / s.

[0013] As a preferred implementation, the antenna reflective surface is made of aluminum alloy.

[0014] The antenna reflecting surface is set and realized by stamping with an aluminum alloy mold, which is easy to form, the antenna surface curve is easy to ensure, and the surface accuracy is easy to meet.

[0015] As a preferred implementation manner, the Ku power amplifier and the Ka power amplifier are arranged on the same side of the antenna reflection surface.

[0016] By setting the Ku power amplifier and the Ka power amplifier, since the Ku power amplifier and the Ka power amplifier are placed on the chassis of the antenna mount, the structure is stable and reliable.

[0017] As a preferred implementation, the Ku / Ka integrated feed source is configured as a plain-wall horn.

[0018] As a preferred implementation, the Ku / Ka integrated feed and the Ku / Ka dual-frequency network are both arranged on the same side of the antenna reflection surface.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] The utility model is provided with a Ku / Ka integrated feed source and a Ku / Ka dual-frequency network. The antenna adopts the design of the Ku / Ka integrated feed source and the Ku / Ka dual-frequency network, has the ability of time-sharing and simultaneous operation in the Ku and Ka frequency bands, does not need to disassemble the feed source and the network, and the reflective antenna surface adopts an integrated structure with light weight. In addition, because the antenna mount adopts a four-axis structure of azimuth + roll + pitch + polarization rotation, it can keep tracking of GEO, IGEO, medium orbit, low orbit and other orbital target satellites during movement under complex marine environments, and is used for providing broadband and anti-interference satellite communication means between satellite-in-motion ship-borne stations and shore-based, ships, aircraft and the like, to realize uninterrupted interactive transmission of voice, video and data beyond line of sight. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0022] Figure 2 It is a three-dimensional structural diagram of the reflective surface of the antenna of the utility model;

[0023] Figure 3 It is a schematic diagram of the three-dimensional structure of the Ku / Ka splitter of the utility model.

[0024] In the figure: 1. Antenna reflector; 2. Ku / Ka integrated feed; 3. Ku / Ka dual-frequency network; 31. Ku / Ka splitter; 32. Ka broadband rotating joint; 33. Ka broadband circular polarizer; 34. Ka broadband orthogonal mode coupler; 35. Ka waveguide polarization switch; 36. Filter; 37. LNB; 38. Ku rotating joint; 4. Ku power amplifier; 5. Ka power amplifier; 6. Antenna mount. DETAILED DESCRIPTION

[0025] The utility model is further described below in conjunction with embodiments.

[0026] The following examples are used to illustrate the present invention, but cannot be used to limit the scope of protection of the present invention. The conditions in the examples can be further adjusted according to specific conditions, and simple improvements to the method of the present invention under the premise of the concept of the present invention are all within the scope of protection claimed by the present invention.

[0027] See also Figure 1-3The utility model provides a KuKa dual-frequency shipborne mobile communication antenna, comprising an antenna reflector 1, a Ku / Ka integrated feed source 2, a Ku / Ka dual-frequency network 3, a Ku power amplifier 4, a Ka power amplifier 5 and an antenna mount 6. The Ku / Ka integrated feed source 2 is configured as a light wall speaker. The Ku / Ka integrated feed source 2 and the Ku / Ka dual-frequency network 3 are both arranged on the same side of the antenna reflector 1. By arranging the Ku / Ka dual-frequency network 3, the Ku / Ka dual-frequency network 3 is mainly used for separating Ku transmission, Ku reception and Ka transmission, Ka reception signals. The Ku / Ka integrated feed source 2 is connected to the Ku / Ka dual-frequency network 3, and the Ku / Ka dual-frequency network 3 is connected in the antenna reflector 1. The antenna reflector 1 is made of aluminum alloy. The Ku power amplifier 4, the Ka power amplifier 5 and the antenna reflector 1 are all connected to the chassis of the antenna mount 6. The Ku power amplifier 4 and the Ka power amplifier 5 are arranged on the same side of the antenna reflector 1. The antenna mount 6 adopts a four-axis structure of azimuth + roll + pitch + polarization rotation. By setting the antenna mount 6, because the antenna mount 6 adopts a four-axis structure of azimuth + roll + pitch + polarization rotation, it is used to support the antenna surface and the Ku / Ka dual-frequency network 3, and because the antenna mount 6 adopts a four-axis structure of azimuth + roll + pitch + polarization rotation, the displacement of the ship in heading, longitudinal and lateral directions is offset by the rotation of the four axes of azimuth, pitch, roll and polarization, so as to ensure that the antenna feed communication system is always aimed at the target satellite and maintains a fixed polarization angle, so as to achieve uninterrupted interactive transmission.

[0028] Among them, the Ku / Ka dual-band network 3 includes a Ku / Ka splitter 31, a Ku rejection filter 36, a Ku rotating joint 38, a Ka broadband rotating joint 32, a Ka broadband circular polarizer 33, a Ka broadband orthogonal mode coupler 34, a Ka waveguide polarization switch 35, a Ka rejection filter 36 and an LNB 37. By setting the Ku / Ka splitter 31, the Ku / Ka splitter 31 is mainly used for separating the Ku-band signal and the Ka-band signal to achieve the requirement of Ku-band transceiver isolation ≥85dB, and solve the problem of discontinuous transmission of the Ku-band transmission signal during polarization rotation;

[0029] The main channel of the Ku / Ka splitter 31 has two circular waveguide ports, one end of the Ku / Ka splitter 31 is connected to the Ku / Ka integrated feed source 2, and the other end of the Ku / Ka splitter 31 is connected to the Ka broadband rotating joint 32. By setting the Ka broadband rotating joint 32, the Ka broadband rotating joint 32 is used to solve the problem of maintaining continuous transmission of Ka-band signals during the Ku-band polarization rotation process;

[0030] The Ku transmitting port and the Ku receiving port on the side of the Ku / Ka splitter 31 are respectively connected to the Ku rotating joint 38 and the transmission resistance filter 36, and the other end of the Ka broadband rotating joint 32 is connected to the Ka broadband circular polarizer 33. By setting the Ka broadband circular polarizer 33, the Ka broadband circular polarizer 33 is used to realize the circular polarization transmission of the signal;

[0031] The other end of the Ka broadband circular polarizer 33 is connected to the circular waveguide port of the Ka broadband orthogonal mode coupler 34. By setting the Ka broadband orthogonal mode coupler 34, the Ka broadband orthogonal mode coupler 34 is used for polarization decomposition;

[0032] The Ka waveguide polarization switch 35 has four waveguide ports. By setting the Ka waveguide polarization switch 35, the Ka waveguide polarization switch 35 is mainly used for switching signal polarization, for achieving Ka-band transceiver isolation ≥ 85dB, and for processing received signals;

[0033] Two of the opposite waveguide ports are connected to two ports of the Ka broadband orthogonal mode coupler 34, and the other two ports are connected to the Ka rejection filter 36 and the LNB 37 respectively.

[0034] Working principle and use process of the utility model: When the antenna is in use, the antenna reflective surface 1 can rotate the four axes of azimuth, pitch, roll and polarization through the antenna mount 6 to offset the displacement of the ship in heading, longitudinal and lateral directions, ensuring that the antenna feed communication system is always aimed at the target satellite and maintains a fixed polarization angle. This set of antenna systems is used in a 1-meter ship-borne moving communication system. The receiving frequency in the Ka band is 17.7-21.2 GHz, the transmitting frequency is 27.5-31 GHz, and the Ka band transmit-receive axis ratio is less than 1d; the receiving frequency in the Ku band is 10.7-12.75 GHz, the transmitting frequency is 13.75-14.5 GHz, the cross-polarization isolation in the Ku transmit-receive band is less than -33 dB, the radiation pattern is symmetrical, the first side lobe of the Ku / Ka dual-band antenna is less than -14 dB, the voltage standing wave ratio is less than 1.5, and other electrical properties are good, meeting the good index requirements.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A KuKa dual-frequency shipborne in-motion antenna, comprising an antenna reflector (1), a Ku / Ka integrated feed source (2), a Ku / Ka dual-frequency network (3), a Ku power amplifier (4), a Ka power amplifier (5) and an antenna mount (6), characterized in that: The Ku / Ka integrated feed source (2) is connected to the Ku / Ka dual-frequency network (3), the Ku / Ka dual-frequency network (3) is connected inside the antenna reflection surface (1), and the Ku power amplifier (4), the Ka power amplifier (5) and the antenna reflection surface (1) are all connected to the chassis of the antenna mount (6); The Ku / Ka dual-frequency network (3) comprises a Ku / Ka splitter (31), a Ku rejection filter (36), a Ku rotating joint (38), a Ka broadband rotating joint (32), a Ka broadband circular polarizer (33), a Ka broadband orthogonal mode coupler (34), a Ka waveguide polarization switch (35), a Ka rejection filter (36) and an LNB (37). The main channel of the Ku / Ka splitter (31) has two circular waveguide ports. One end of the Ku / Ka splitter (31) is connected to a Ku / Ka integrated feed source (2), and the other end of the Ku / Ka splitter (31) is connected to the Ka broadband rotating joint (3 2), the Ku transmitting port and the Ku receiving port on the side of the Ku / Ka splitter (31) are respectively connected to the Ku rotating joint (38) and the transmission stop filter (36), the other end of the Ka broadband rotating joint (32) is connected to the Ka broadband circular polarizer (33), the other end of the Ka broadband circular polarizer (33) is connected to the circular waveguide port of the Ka broadband orthogonal mode coupler (34), and the Ka waveguide polarization switch (35) has four waveguide ports, two of which are opposite to each other and are connected to the two ports of the Ka broadband orthogonal mode coupler (34), and the other two ports are respectively connected to the Ka transmission stop filter (36) and the LNB (37).

2. The KuKa dual-band shipborne in-motion antenna according to claim 1, characterized in that: The antenna mount (6) adopts a four-axis structure of azimuth+roll+pitch+polarization rotation.

3. The KuKa dual-band shipborne mobile communication antenna according to claim 1, characterized in that: The antenna reflection surface (1) is made of aluminum alloy.

4. The KuKa dual-band shipborne mobile antenna according to claim 1, characterized in that: The Ku power amplifier (4) and the Ka power amplifier (5) are arranged on the same side of the antenna reflection surface (1).

5. The KuKa dual-band shipborne in-motion antenna according to claim 1, characterized in that: The Ku / Ka integrated feed source (2) is configured as a plain-wall horn.

6. The KuKa dual-band shipborne in-motion antenna according to claim 1, characterized in that: The Ku / Ka integrated feed source (2) and the Ku / Ka dual-frequency network (3) are both arranged on the same side of the antenna reflection surface (1).

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