Full-angle frequency beam scanning antenna based on the coplanar waveguide

In order to meet the requirements of wide-angle frequency beam scanning antenna in planar-integrated communication and radar field, a design method for low-profile, miniaturized, full-angle frequency beam scanning antenna is proposed. The antenna is constructed by hole arrays etched on the coplanar waveguide, which forms spoof surface plasmon polariton structure and the frequency beam scanning wave is generated by using its high-order radiation modes. The periodic comb structures are etched on the one side of the coplanar waveguide metal ground, which fed by coplanar waveguide and generated the low frequency reverse end-fire waves. The simulated results show that, within 9.1−53 GHz, the frequency beam scanning angle of the antenna can cover 180° with an average gain level of 12.75 dBi. Due to the limitation of frequency range of vector network analyzer, the measured results within 9.1−40 GHz are in good agreement with the simulation ones. The antenna has the characteristics of easy fabrication, low profile, low cost and full frequency scanning angle, which provides a new idea for wide-angle antenna design in planar integrated system and radar field.