Inverted-L reflectarray element with interdigital gap loading structure

A novel inverted-L reflectarray element (ILRE) with interdigital gap loading structure is proposed for reflectarray design to improve the propagation channel quality for wireless communications in a non-line-of-sight (NLOS) environment. By using the inverted-L structure structure, the directivity at the desired direction can be enhanced. Combined with the interdigital gap loading structure, both broad reflection phase range and stable scattering angle are obtained. The proposed reflectarray technique can be used to eliminate the blind spots of base station antennas in a downtown, high-building district and other applications.