Metantenna design with one‐dimensional holographic concept

Abstract

In this paper, metasurface antenna (metantenna) with one-dimensional holographic concept is proposed and an example of producing 50° radiation beam angle at 16 GHz is taken to certify the metantenna operating principle. We first introduce one-dimensional holographic theory to simplify the metasurface design. By this means, compared with the traditional two-dimensional metantenna, the integral structure has fewer unit cells, simpler structure and the beam-tilt is achieved as well. Simultaneously, to feed the metasurface above efficiently, the tapered microstrip line is modified by adding a sloping metal strip as a plane-wave surface wave launcher, thus obtaining a smooth transition from Quasi transverse electromagnetic wave to transverse magnetic wave and a broad frequency band of impendence matching. A prototype is fabricated and tested at last. The measured radiation beam angle is 49° at 16 GHz, which approximates to the desired beforehand. On the other hand, this metantenna has a beam scanning angle of 24° to 63° from 13 to 17.5 GHz. The gain is about 13 to 15 dBi and the half power beam width is about 9° in the above frequency range. It has features of stable high gain, narrow beamwidth and high radiation efficiency.