Strong-coupling ultra-wideband phased array antenna based on interdigital resistive surface loading

Abstract

The invention discloses a strong-coupling ultra-wideband phased-array antenna based on interdigital resistive surface loading and a development method of the strong-coupling ultra-wideband phased-array antenna. By improving a traditional vertical strong-coupling phased array antenna, an interdigital resistive surface is loaded between the antenna and a reflecting floor, and the working frequency band of the antenna is broadened. An ultra-wideband coplanar strip line-microstrip line feed balun is applied, the ultra-wideband coplanar strip line-microstrip line feed balun and an antenna radiationpatch are integrated on the same antenna dielectric substrate, and the ultra-wideband coplanar strip line-microstrip line feed balun is simple in structure and convenient to process. The dielectric matching layer of the metal split ring metamaterial structure is printed above the antenna, a traditional pure dielectric wide-angle impedance matching layer is replaced, the weight is lighter, and thethickness is smaller. The antenna is simple and stable in structure and easy to process, the active standing wave of 60-degree scanning of an E surface is smaller than 2.5 in the fL-10fL frequency band, the active standing wave of 60-degree scanning of an H surface is smaller than 3.6, the overall height of the antenna is smaller than 0.65 high-frequency wavelength, and the phased-array antenna with the design is particularly suitable for an application platform needing an ultra-wide working band.

Description

technical field [0001] The invention belongs to the technical field of antenna engineering, in particular to an ultra-wideband phased array antenna based on a strong mutual coupling effect and a development method thereof. Background technique [0002] The phased array antenna technology was proposed by scholars as early as 1925. Its working principle is to control the beam by changing the feed phase in the array antenna. Phased array antennas are widely used in the fields of radar, communication and electronic countermeasures because of their rapid beam changing capabilities, multi-beam scanning capabilities, and space signal power combining capabilities. The development of modern radar, electronic communication and other technologies, as well as the emergence of high-speed platforms such as aircraft and missiles, have put forward higher requirements for the detection range of radar and the ability of fast tracking and identification of targets. In order to meet the large-...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of insufficient working bandwidth and high profile of the vertical strong coupling antenna, load an interdigitated resistive surface structure, and add an ultra-wideband feed matching structure to achieve a lower profile height, and has f L -10f L (decade) ultra-wideband coverage and dual-polarized low-profile ultra-wideband strong-coupled dipole phased array antenna with E-plane and H-plane ±60° wide-angle scanning

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