Wide Angular Coverage Deflector: 60-GHz three-dimensional passive electromagnetic deflector achieves wide angular coverage

A three-dimensional (3-D) passive electromagnetic (EM) deflector configuration, based on the concept of spatial feeding, is proposed that modifies the incident EM energy from the steerable planar antenna array (source) to achieve wide angular coverage. A generalized analytical formulation of the parametric deflector configuration is carried out. The analytical modeling has been validated by 3-D simulations and measurements. The analytical results for the deflector configuration indicate that a wide angular coverage is possible at the cost of reduced gain. An improved 60-GHz circularly polarized (CP) deflector element has been designed that provides phase shift with element rotation upon transmission of circular polarization. The simulation results show that the proposed CP element operates successfully, in terms of realization of phase-shift range from 0? to 360? and good transmission properties (transmission loss < 1 dB) for the desired frequency band of 57?64 GHz.