Broadband low-sidelobe series-fed CTS (Continuous Transverse Stub) antenna

Abstract

The invention provides a broadband low-sidelobe series-fed CTS (Continuous Transverse Stub) antenna, and aims to provide a CTS antenna which is high in gain and efficiency, good in standing wave, high in radiation capability and obvious in grating lobe suppressing effect. The broadband low-sidelobe series-fed CTS antenna is implemented according to the technical scheme that a radiation array (1) is provided with a plurality of hollowed-out air elongated slots (12) with a two-stage stepped transition structure, a split waveguide power divider (13) is arranged above a boundary step surface, and each waveguide power divider divides the corresponding air elongated slot into two identical two-stage stepped transition channels (14); and in operation, a feed waveguide cavity (2) at the bottom of the radiation array provides quasi-TEM waves through a hollowed-out inclined air cavity (22), and the quasi-TEM waves sequentially flow into each antenna radiation unit in the radiation array (1) from left to right and radiate into the natural space from the air elongated slot to the waveguide power divider and then to the two-stage stepped transition channels, thereby enabling an antenna directional pattern to realize low sidelobe within a broadband along a radiation unit distribution surface. The antenna provided by the invention is particularly suitable for acting as a broadband low-sidelobe series-fed array antenna.

Description

technical field [0001] The invention relates to a series-fed continuous section segment array antenna CTS (Continuous Transverse StubArrays) antenna, especially a series-fed array antenna suitable for broadband, low sidelobe, low profile, low cost and high performance. Background technique [0002] With the rapid development of modern wireless communication technology, low-profile waveguide slot antennas are increasingly favored by people because of their advantages such as light weight, low cost, and easy processing. However, the general waveguide slot antenna has a narrow bandwidth, and the sidelobe increases with the frequency shift, so it is limited in practical applications. Therefore, how to widen the bandwidth of the low-profile waveguide slot antenna and achieve low sidelobes in the pattern is of great significance. As a kind of waveguide slot antenna, the CTS antenna adopts a continuous transverse slot as the radiation unit, and the antenna bandwidth can be expande...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention aims at the deficiencies of the prior art, as well as defects such as narrow bandwidth or high profile and large volume of existing low-sidelobe antennas, to provide a low-cost, low-profile, high-gain, high-efficiency, standing-wave antenna A broadband low-sidelobe series-fed CTS antenna with good radiation capability and obvious grating lobe suppression effect

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