Substrate-integrated antenna system for microwave and millimeter wave applications

In this paper, a substrate-integrated antenna system for ultrawideband (UWB) applications and millimeter-wave for 5G applications is presented. An ultra-wideband antenna is designed by using the uniplanar nature of coplanar waveguide to create two tapered slots. On the same substrate, a millimeter-wave antenna is incorporated where the surface current is the lowest. The UWB and millimeter-wave antennas provide respectively, a bandwidth going from 3 to 11 GHz and 26.1 GHz to 30.3 GHz (4.3 GHz), while keeping an acceptable isolation.