A 140 GHz LTCC-based High-efficiency Heterogeneous Reflectarray Antenna

One design strategy of heterogeneous reflectarray antenna (RA) is presented. A 140 GHz high-efficiency low-profile RA based on heterogeneous reflective elements is designed, fabricated and measured. Compared with homogeneous RA, the proposed heterogeneous RA shows better directionality, higher aperture efficiency, wider gain-bandwidth and lower cross-polarization. The measured results of the proposed RA indicate the realized gain of 31.39 dBi at 140 GHz and aperture efficiency of 46.22%. With above features, the proposed RA is expected to use for short distance communication applications in THz band.