A ku/ka ultra-wide dual-frequency composite feeder network system

Abstract

The present invention provides a Ku / Ka ultra-broadband dual-frequency composite feed network system, including a Ku / Ka ultra-broadband dual-composite feed source, a Ku / Ka ultra-broadband dual-frequency connecting waveguide, a fastener, a Ku / Ka ultra-broadband positive Alternating mode, Ka ultra-wideband transmit-rejection filter, Ka ultra-wideband receiver-rejection filter, Ku ultra-wideband circular-to-square connection waveguide and Ku ultra-wideband dual-port filter. According to actual needs, the invention invents a Ku / Ka ultra-wide dual-frequency composite feeding network system that can work in time-sharing, and the Ku / Ka ultra-wide dual-frequency composite feeding network system is used as a ring-focus antenna to send and receive signals, thereby reducing the occupied space; Simplifying the Ku / Ka ultra-wide dual-frequency feed network and reducing the number of waveguides used in the network can help improve the overall performance of the ring focus antenna, which is easy to use and low in cost.

Description

technical field [0001] The invention belongs to the technical field of satellite communication, in particular to a Ku / Ka ultra-wide dual-frequency composite feeding network system. Background technique [0002] As a mainstream communication method today, satellite communication has many unique advantages. The rapid development of satellite communication technology has put forward new requirements for its ground station antennas, such as wide-band or multi-band, low cross-polarization, multi-beam, wide scanning angle range, dual-polarization or multi-polarization and so on. In addition, the development of the satellite mobile communication industry also requires that the ground station antenna must also have the function of communication in motion, and meet the requirements of small size, light weight, and low cost. Traditional ring focus antennas are more and more difficult to meet these requirements. Although the general phased array scanning system can meet most of the ab...

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Problems solved by technology

[0003] Defects and deficiencies of the existing technology: Ku / Ka super dual-frequency feed network system is mainly composed of separate Ku feed network system and Ka feed network system. In actual use, two sets of feed network systems need to be switched back and forth

Ku / Ka dual-band antennas are mostly used in ring-focus antennas. Because the feed sources in the Ku feed network system and the Ka feed network system are different in operating frequency bands, it is difficult for the two different frequency band feed sources to have their phase centers on a horizontal line. It brings about the trade-off of the electrical performance of the overall antenna. In the past, most antenna designers use the middle point of the phase centers of the feed sources in two different frequency bands as the final phase center point. Doing so will make the electrical performance indicators of the overall antenna worse.

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