Multilayer antenna array in Q band for spatial communications

Abstract

This paper deals with a multilayer printed antenna array. This study takes place in European MIPA project [1] concerning an antenna prototype which is apart of Q band (50 GHz) one-feed-per-beam antenna reflector. In millimetre waves, it is highly required to separate active layer (MEMS, MMIC, ‥) and radiating elements to avoid electrical spurious generated by coupling radiation. This separation is done with a very thick metallic support (2 mm). Moreover, this thick ground plane is important for thermal dissipation aspect. In this aim, the authors present an original feed of antenna array via a H shape thick slot transition. Results of antenna array radiating patterns, power gain and efficiency are given in the considering bandwidth (47.2 to 50.2 GHz).