Wideband Planar Leaky-Wave Antenna Based on Grounded Coplanar Waveguide (GCPW) for Millimeter-Wave Wireless Systems

The well-known power/energy leakage phenomenon between an unshielded grounded coplanar waveguide (GCPW) and its neighboring parallel-plate waveguide (PPW) is artfully exploited herein to develop a class of leaky-wave antenna (LWAs), i.e., GCPW LWAs. Considering that both the GCPW and PPW behave in a non-dispersive manner regarding their dominant modes (i.e., quasi-TEM and TEM, respectively), the relevant angle of power leakage between them is kept constant, thereby paving the way for realizing a GCPW LWA radiating a wideband and fixed beam. To make the beam angle flexibly tailorable, three engineering approaches are proposed. Thanks to the merits of simple configuration, single layer, low cost, wideband radiation, and beam angle design flexibility, our proposed GCPW LWAs have potential applications in millimeter-wave wireless systems such as 60 GHz point-to-point communications. © 2023 IEEE.