Simple Algorithm of Antenna Array Calibration

Abstract

This paper presents a simple algorithm for the calibration of antenna arrays. It belongs to the phase-less algorithms family, because it does not require the expensive phase measurement equipment. The estimation and compensation of the complex-valued gains of the array channels, caused by non-identical characteristics of these channels, is the aim of a calibration task. For the estimation, the considered calibration algorithm uses only three measurements of the array output power under 0°, 90° and 270° phase shifter states in each channel. The algorithm explanation and the main steps of the algorithm development, based on the geometrical representation of the antenna array signals, are presented. The algorithm efficiency is proved via simulation.