Improved Performance of the Basic Array of a Microstrip Adaptive Antenna Using a Tree Structure of Patch Fed by Electromagnetic Coupling

The aim of this paper is to improve the performance of a basic microstrip antenna array using a tree structure patch supplied by electromagnetic coupling. The developed network which contains two subnets, a distribution subnet and a scanning subnet, is considered as a first step to design an adaptive microstrip antenna for UMTS use. The patch distribution structure used in this experiment allowed a great improvement of gain, directivity as well as the adaptation level of the studied array. The following paper was realized in the laboratory signals, systems and components of FST-Fes, in collaboration with the Microwave Laboratory of the National Institute of Posts and Telecommunications of Rabat.