Strongly coupled ultra-wideband phased array antenna based on interdigitated resistive surface loading

Abstract

The invention discloses a strongly coupled ultra-wideband phased array antenna based on interdigitated resistive surface loading and a development method thereof. By improving the traditional vertical strong-coupling phased array antenna, a cross-toed resistive surface is loaded between the antenna and the reflective floor to broaden the working frequency band of the antenna. An ultra-broadband coplanar stripline-microstrip line is used to feed the balun, and the antenna radiation patch is integrated on the same antenna dielectric substrate, which has a simple structure and easy processing. The dielectric matching layer of the metal split ring metamaterial structure printed above the antenna replaces the traditional pure dielectric wide-angle impedance matching layer, which is lighter in weight and thinner in thickness. The structure of the present invention is simple and stable, and is easy to process. L ~10f L In the frequency band, the active standing wave of the 60-degree scanning of the E plane is less than 2.5, and the active standing wave of the 60-degree scanning of the H plane is less than 3.6, and the overall height of the antenna is less than 0.65 high-frequency wavelengths. The phased array antenna designed with this design is especially suitable for the needs Application platform for ultra-wide operating frequency 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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