Flexible ultrathin modularized ultra-wideband tight coupling array antenna

Abstract

The invention relates to a flexible ultra-thin modular ultra-wideband tight coupling array antenna, which comprises a radiation layer, the radiation layer is arranged on the uppermost layer of the array antenna by using a flexible substrate, a plurality of antenna radiation patches and a coplanar feeder line are printed on the flexible substrate, each antenna radiation patch is divided into a first radiation arm and a second radiation arm, the first radiation arm and the second radiation arm are respectively printed on two surfaces of the flexible substrate and are partially staggered; the supporting layer is of a honeycomb structure, has the characteristic of flexibility and plays a supporting role; the high-resistance layer is used for suppressing the backward radiation of the radiation layer and reducing the negative influence of the metal floor on the array antenna; the floor layer is adhered to the bottom surface of the high-resistance layer by adopting a soft metal copper foil and is used as a metal ground of the array antenna; and the plurality of feed coaxial lines are connected with the coplanar feeder lines, and feed ports are led to the bottom of the antenna. According to the invention, the ultra-thin, flexible and ultra-wideband characteristics of the array antenna are realized.

Description

technical field [0001] The invention belongs to the technical field of antennas, and in particular relates to a flexible ultra-thin modular ultra-wideband tightly coupled array antenna, which is used to be conformal on the surface of metal carriers with different shapes. Background technique [0002] Traditional broadband antennas have been widely used in modern times, mainly because their wide frequency bands enable tasks that originally required several antennas to be completed with only one antenna. However, the shortcomings of the traditional broadband antenna array are also obvious. First, the array elements in the antenna array need a large distance, because if the array elements are arranged closely, there will be strong coupling between adjacent elements. Therefore, in order to realize the requirement of forming an array, the broadband antenna needs a relatively large size, and it is difficult to realize the requirement of miniaturization. At the same time, the freq...

AI Technical Summary

Problems solved by technology

For the profile height, most of the current ultra-broadband tightly coupled array antennas need to set a metal reflector at the quarter wavelength below the array in order to achieve forward radiation, so the profile height is still relatively high, and in order to achieve in-band impedance matching needs The impedance transforming balun is placed vertically, so the antenna is also difficult to bend

[0004] For example, the application publication number is CN106785484A, and the patent application named "a design method of ultra-wideband array antenna" adopts the traditional Vivaldi antenna to realize the 2-18GHz Frequency band coverage, but its profile height of 65mm is about 0.43 of the lowest frequency operating wavelength, and the profile height is very high and it is difficult to meet the conformal requirements

The application publication number is CN106684574A, and the patent application titled "6-18GHz ultra-broadband array antenna" adopts the idea of ​​tightly coupled array to achieve 6-18GHz frequency band coverage, but it adopts a vertically placed impedance transformation balun, so It is also difficult to achieve conformal requirements

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