Frequency Beam Scanning Antenna Based on the Quasi-Coplanar Waveguide

In this paper, a frequency beam scanning antenna based on the quasi-coplanar waveguide is proposed. The proposed design is employed by a quasi-coplanar waveguide (Q-CPW) line with periodic holes etched on its middle line to generate frequency scanning wave. The antenna is operated based on the higher-order modes of the spoof surface plasmon polaritons (SSPPs). Simulation results show that the bandwidth of the proposed antenna is about 100% (from 6-18 GHz for |S
11
|<-10 dB). Moreover, the scanning angle can reach 99° with an average peak gain level of 12.89 dB. The proposed Q-CPW-based frequency scanning antenna is beneficial to design the array structure, which can find potential applications in planar integrated communication systems.