High gain antenna characteristics for 300 GHz band fixed wireless communication systems

To realize the terahertz fixed wireless communication links, a high gain antenna is required to compensate the large path loss of high frequency band. In this paper, high gain antennas of horn, cassegrain and off-set parabolic types are developed, and these antenna radiation patterns are measured at 300 GHz. The measured patterns are compared with the mathematical models of lower frequency band, and it is found that they have good agreements. This study of high gain antennas can contribute to a link budget design and interference evaluation of terahertz wireless communication systems.

1. Introduction

Terahertz communication system is a candidate of high speed fronthaul and backhaul links in the next generation wireless networks. Our organization proposes to build 300 GHz wireless links with optical fiber backbone network [1]. To develop these terahertz links, a high gain antenna with low side-lobe characteristics is a key technology to extend the communication range and avoid the interference to other wireless systems.