An ultra-wideband low-profile circularly polarized dual-arm helical antenna

Abstract

The invention belongs to the technical field of antennas, and provides an ultra-wideband low-profile circularly polarized double-arm helical antenna, which is used to solve the contradiction of the existing helical antenna in consideration of its ultra-wideband, low profile, circular polarization, and high-gain development. The helical antenna includes a back cavity, a radiator dielectric substrate, an antenna helical arm, a balun, and a coaxial joint, wherein a feeding port is provided in the center of the radiator dielectric substrate, the antenna helical arm is located on the upper surface of the radiator dielectric substrate, and the antenna helical The arm is connected to the upper end of the balun through the feed port, the balun is located inside the back cavity, and the lower end of the balun is connected to the coaxial joint; the back cavity includes a cylinder arranged in the center of the back cavity and an inclined plane connected to the cylinder, the The cylinder and the inclined plane together form a circular platform, and the cylinder is provided with a circular groove and a window for setting the balun. The helical antenna provided by the invention better meets the performance requirements of the helical antenna with wide frequency band, low profile, circular polarization and high gain, and at the same time greatly improves the frequency band bandwidth of the antenna.

Description

technical field [0001] The invention belongs to the technical field of antennas, and in particular relates to an ultra-wideband low-profile circularly polarized double-arm helical antenna. Background technique [0002] With the development of aerospace and military technology, the frequency of information transmission gradually develops to high frequency, which requires the bandwidth of the antenna to gradually widen. With its advantages of miniaturization, broadband, integration, high gain, and low cost, ultra-wideband technology has great application prospects in many fields such as satellite navigation, anti-radiation missiles, and electronic countermeasures. The ultra-wideband helical antenna itself is a circular pole However, the bandwidth of the antenna is difficult to achieve 10 octaves, and it is even more difficult to achieve 20 octaves. For modern electronic warfare, this ultra-bandwidth characteristic is of great significance. At present, the methods of widening ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an ultra-wideband low-profile circularly polarized dual-arm helical antenna to solve the contradiction of the existing helical antenna in consideration of its ultra-wideband, low profile, circular polarization, and high-gain development

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