Wideband line source for planar CTS (continue transverse stub) antenna

Abstract

The invention relates to a wideband line source for a planar CTS (continue transverse stub) antenna. The wideband line source includes a feed network, a first rectangular waveguide and n H-faced, single-ridge and rectangular waveguide T-junctions, wherein n is an integer greater than or equal to 2; the width of each H-faced, single-ridge and rectangular waveguide T-junction ranges from 1.5 Lambda to 2.3 Lambda, wherein Lambda is equal to c / f, wherein c is velocity of light, and f is a center frequency required for the design of the wideband line source; the feed network is a power divider; the n output ends of the power divider are connected with the front ends of the n H-faced, single-ridge and rectangular waveguide T-junctions in a one-to-one corresponding manner; the rear ends of the n H-faced, single-ridge and rectangular waveguide T-junctions are connected with the front end of the first rectangular waveguide; the width of the H-faced, single-ridge and rectangular waveguide T-junction array is smaller than the width of the first rectangular waveguide by 0.5 Lambda to Lambda; and the longitudinal center line of the H-faced, single-ridge and rectangular waveguide T-junction array is overlapped with the longitudinal center line of the first rectangular waveguide. The wideband line source has the advantages of small structural size, miniaturization, wide bandwidth, simple assembly and low cost.

Description

technical field [0001] The invention relates to a broadband line source, in particular to a broadband line source for a planar CTS antenna. Background technique [0002] In the field of spaceborne communication, high-sensitivity, wide-band and low-profile high-performance antennas can not only make the antenna work in multiple frequency bands but also greatly reduce the cost of use, and have been widely used. In 1990, Hughes Aircraft Company of the United States invented the planar CTS (Continue Transverse Stub, continuous transverse stub) antenna. The planar CTS antenna adopts TEM mode feeding, and realizes radiation by continuously opening through transverse slots on the planar waveguide and adding branches on the transverse slots. It has high feeding efficiency and aperture efficiency, and the CTS array is easy to realize beam control and Dual polarization and other functions, easy processing and low cost, is an extremely important research direction of high-gain antenna...

AI Technical Summary

Problems solved by technology

However, the broadband line source has the following problems: 1. The offset parabolic reflector requires a large space and is large in size, which is not conducive to the miniaturization design of the broadband line source; 2. The processing requirements of the offset parabolic reflector are relatively high ;3. During the assembly process, the focus of the offset parabolic reflector and the phase center of the H-plane fan-shaped horn antenna need to be strictly aligned, and the assembly requirements are relatively high

The structure of the broadband feeder source is small in size, can be miniaturized, has a wide frequency range, and is easy to assemble, but its core component, the planar dielectric lens, is a linear array structure formed by multiple strips with different dielectric constants. Higher, which significantly increases the processing cost, resulting in higher cost of the broadband feeder source

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