Phase Shift Effects Analysis on Radiation Pattern of a Ground Plane Antenna Array

This paper presents an analysis on the effect of the controlled phase shift introduced between feeding signals of an antenna array elements on modifying its radiation pattern shape. Following the idea of increasing measurements accuracy on phased antenna arrays, it was designed and built an antenna array containing two radiating telescopic elements located on a contiguous metal ground plane. All the hardware related to the functionality of the phased array was placed on the bottom of the ground plane. Even though the array was designed for the 915 MHz band, allocated to various useful satellite services, it is easily tunable in a wide range of other frequencies and also easily modifiable in a multi-element array, due to the design of the ground plane. This paper also shows a good agreement between the experimental results and those obtained from numerical simulations.