Array Antenna with HIS Metasurface for mmWave Imaging Applications

An uniplanar compact array-HIS antenna suitable for imaging in the ISM mmWave frequency band (24.05 GHz–24.25 GHz) is presented. Collision avoidance system to support blind people is the intended application. Different arrangements of the HIS unit cells are considered in the combination with the basic array, to improve the radiation parameters. Prototypes of both, the basic array and an optimized array-HIS are fabricated and measured in an anechoic chamber. Comparison between simulation and measurement is conducting in terms of impedance matching, bandwidth and gain. The achievements of the optimized array-HIS are compared with the state of the art antennas at 24 GHz