Design and implementation of lenses for shaping the beam of millimeter waves in free space

Abstract

This paper deals with the beam forming of the electromagnetic waves with a wavelength in the order of millimeters. The goal is to design, implement and verify the dielectric lens of a suitable material for shaping the beam of millimeter waves to the plane wave and refine and analyze signal frequency range from 220 GHz to 325 GHz. For this purpose a specialized measuring workplace is used. It is equipped with the vector network analyzer ZVA67 by Rohde and Schwarz. It also includes millimeter wave converter for achieving the frequency range up to 325 GHz. The measurement is performed in free space with respective circular antennas. Three measurement methods are used to verify the proper function of developed lenses. The aim is to get the system of dielectric lenses in the millimeter band, which would replace the complicated system of mirrors. In the implementation of the system it is necessary to pay attention to the accuracy of manufacture and the quality of the chosen material.