A UWB Conformal Endfire Antenna Based on Log Periodic Slots

Abstract

The invention discloses an ultra-broadband conformal end-fire antenna based on logarithmic periodic slits, which sequentially includes a dielectric coating, a coplanar waveguide-microstrip with a different-plane coplanar waveguide-microstrip line conversion device from top to bottom A line conversion device layer, a radiation gap layer with a radiation gap and a metal back cavity; the dielectric cladding layer is in close contact with the coplanar waveguide-microstrip line conversion device layer, and the radiation gap layer is in close contact with the metal back cavity; the dielectric cladding layer, The coplanar waveguide-microstrip line conversion device layer, the radiation slot layer and the metal back cavity are fixed together by metal pins. The invention provides an ultra-broadband conformal end-fire antenna based on a logarithmic periodic slot, which adopts a logarithmic periodic non-frequency variable structure, is loaded through a new type of metal back cavity, and uses technical means such as PCB inversion and dielectric coating loading, so that The designed antenna also has the characteristics of simple structure, strong anti-interference ability of metal environment, stable end-fire radiation in ultra-wide frequency band, and high gain in positive end-fire direction.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic antennas, in particular to an ultra-wideband conformal end-fire antenna based on logarithmic periodic slots. Background technique [0002] As a kind of directional antenna, the end-fire antenna can generate end-to-radiation electromagnetic waves. Compared with omnidirectional antennas and other directional antennas, endfire antennas can achieve endfire radiation with a lower profile, and have medium or higher gain characteristics. Electronic communication equipment installed on high-speed moving carriers, such as early warning aircraft radar systems, missile-borne anti-radiation systems, etc., require the antennas on them to have the characteristics of low profile and easy conformal installation, and sometimes these characteristics even determine the antenna. The most important factor of whether it can be applied. The end-fire antenna is very suitable for high-speed moving carrier applic...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an ultra-wideband antenna based on logarithmic periodic slits to solve the shortcomings of the existing end-fire antenna technology, such as narrow bandwidth, difficult conformal installation, unstable end-fire radiation, and unfavorable applications in complex electromagnetic environments. Conformal end-fire antenna adopts logarithmic period non-frequency variable structure, loaded through a new metal back cavity, and uses technical means such as PCB inversion and dielectric coating loading, so that the designed antenna has a simple structure and anti-interference ability of metal environment Strong, stable end-fire radiation in an ultra-wide frequency band, and high gain in the positive end-fire direction

Images