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Ku/Ka frequency band circularly polarization integrated receiving and transmitting feed source antenna

A circular polarization and feed technology, which is applied to antenna unit combinations with different polarization directions, antennas, antenna supports/installation devices, etc., can solve the problems of maximum beam pointing deviation, inability to achieve reception, and the same satellite, etc. , to achieve the effect of low cross polarization, good return loss, and excellent transceiver isolation

Inactive Publication Date: 2011-07-27
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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AI Technical Summary

Problems solved by technology

In the traditional Lunberg lens feed system, single Ku or Ka feeds are placed side by side, and the maximum beam pointing will have a certain angle of deviation, which makes it impossible to receive the same satellite. This feed solves the problem of beam defocus It is especially suitable for the feed system of large satellite communication antennas such as parabolic antennas

Method used

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  • Ku/Ka frequency band circularly polarization integrated receiving and transmitting feed source antenna
  • Ku/Ka frequency band circularly polarization integrated receiving and transmitting feed source antenna
  • Ku/Ka frequency band circularly polarization integrated receiving and transmitting feed source antenna

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Embodiment Construction

[0030] refer to figure 1 , the linear circularly polarized four-band Ku / Ka feed source invented in this paper consists of a flange plate 1, a tapered dielectric rod 2, an internal circular waveguide 3, a Ku feed source emitting SMA connector pair 4, a symmetrical metal short-circuit column 5, Ku feed receiving orthogonal mode pair 6, Ka feed receiving port 7, Ka feed emitting port 8, coaxial waveguide 9, circular polarizer 10, and stepped waveguide 11. The Ku feed source launch SMA connector pair 4 adopts the 50-ohm SMA connector often used in microwave communication, which can be directly connected to the waveguide coaxial converter, followed by the power divider of the 180° bridge; the symmetrical metal short-circuit column 5 passes through the same The part of the outer waveguide is punched and fixed in the coaxial waveguide 9; the inner circular waveguide 3 in the middle of the feed is fixed by extending the length behind the short-circuit wall of the coaxial waveguide 9....

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Abstract

The invention provides a Ku / Ka frequency band circularly polarization integrated receiving and transmitting feed source antenna applied to antenna systems, such as a paraboloid antenna and the like, in satellite communication. The antenna adopts a coaxial nested compact structure, and is applied to Ku frequency band and Ka frequency band at the same time. The basic structure of a feed source comprises a circular waveguide, on which a pointed cone shaped dielectric rod is loaded, a flange, a coaxial waveguide, a symmetrical SMA connector pair, a circular polarizer and an orthogonal mode coupler, wherein the feed source in the Ka frequency band is applied to dual circular polarization, has rotary symmetrical radiation directional diagrams, the circularly polarization axial ratio in Ka double band is smaller than minus 2dB, and the transmitter-receiver isolation is smaller than minus 70dB; and the feed source in the Ku frequency band is applied to dual circular polarization, has rotary symmetrical radiation directional diagrams, a cross polarization level smaller than minus 40dB, and good transmitter-receiver isolation and reflection loss.

Description

technical field [0001] The invention belongs to the technical field of feed source design in wireless communication, and particularly relates to technologies such as Ku / Ka frequency band transceiver four-band, linear circular polarization integration and other technologies in feed source design in satellite communication system. Background technique [0002] With the development of satellite communications, the existing C-band satellite resources can no longer meet the growing demand for satellite communications, so it is imperative to develop Ku and Ka bands. The vigorous development of the satellite communication industry puts forward new requirements for its ground station antennas, such as high gain, broadband or multi-band, low cross-polarization, multi-beam, multi-polarization and so on. [0003] The feed is the heart of the entire antenna system, and a high-performance feed is the first condition for a high-performance antenna system. How to design Ku and Ka frequenc...

Claims

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Application Information

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IPC IPC(8): H01Q19/17H01Q21/24H01Q1/24
Inventor 杨仕文滕静华黄明聂在平
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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