Far Field Antenna Measurement System using Frequency Extenders in Sub-THz frequency range

Characterization of mm-wave Antenna Feed Systems is fundamental and essential requirement for design and performance evaluation of any system. Far Field test range provide the required information in less time with less mathematical complexities. Intermediate Frequency based Antenna measurement system presented that allows to characterize the antenna feed systems from 140 to 220GHz using frequency extenders. This requires different stages of RF multipliers, Solid State Amplifiers to generate frequencies beyond 40GHz/67GHz. In this paper systematic design, development and demonstration of Far Field antenna measurement system at WR5 (140GHz-220GHz) frequency band is presented including the measured performance of Pyramidal Horn Antenna.