A Novel Low-Profile Phased Antenna With Dual-Port and Its Application in 1-D Linear Array to 2-D Scanning

A novel low-profile phased antenna with dual-port and its two types of 1-D linear array to 2-1) space wide-angle beam scanning are proposed. The antenna unit is composed of fishbone structure and rhombus parasitic patch, which is folded into n-shaped to low profile 0.081 lambda. By adjusting the phase difference (Delta(phi)) from 0 degrees to 180 degrees, the antenna working mode is changed from even mode to hybrid mode and to odd mode eventually. Therefore, the proposed antenna unit realizes wide-angle scanning characteristics and continuous switching state from broadside lobe to endfire lobe. Furthermore, the proposed phased antenna element is extended to two kinds of 1-D linear phased array (Array#1 and Array#2) based on the generalized principle of the pattern multiplication. The fabricated Array#1 can realize beam scanning range -116 degrees < theta(m) < 0 degrees (xoz plane), 0 degrees < theta(m) < 63 degrees (yoz plane), and 90 degrees < Phi(m) < 169 degrees (xoy plane) and the fabricated Array#2 can achieve 0 degrees < theta(m) < 60 degrees (xoz plane), 0 degrees < theta(m) < 65 degrees (yoz plane), and 90 degrees < Phi(m) < 152 degrees (xoy plane). The proposed phased antenna unit and its 1-D array can realize 2-D space wide-angle scanning, improving scanning performance and expanding scanning dimensional space in phased array.

Automated summary

This paper proposes a novel low-profile phased antenna with dual-port and its two types of 1-D linear arrays, which have wide-angle beam scanning characteristics and the ability to switch states continuously.