  Microstrip patch antennas are low-profile and robust when mounted on rigid
surfaces of the devices making them suitable for communication and
millimeter-wave applications. In this paper, an antenna is designed for the
resonant frequency of 170 GHz using microstrip technology concerning its
miniaturization and cost-effectiveness. The designed antenna is a part of a
stray radiation detection system for ECE diagnostic to be installed on fusion
research machine ITER. It offers low-directivity to receive radiation from all
directions, high bandwidth, low side-lobe-level and return loss of -50 dB,
leading to its remarkable utilization in the detection system being designed to
protect millimeter wave components of ITER ECE Diagnostic. Power-handling and
power-capturing capability of the designed antenna have also been discussed in
the paper. Far-field simulations have been performed using CST Microwave Studio
software to study the radiation characteristics of the designed antenna.
