A Novel Continual Beam Scanning Periodic Microstrip Leaky-Wave Antenna

In order to eliminate the limitations of the open-stopband (OSB) on the scanning performance of the traditional periodic leaky-wave antennas, a novel continual backward-to-forward beam scanning periodic microstrip leaky-wave antenna (LWA) is presented in this paper. The OSB is eliminated by simultaneously introducing the slots, the metallic vias, and the parasitic patches. The simulation results show that the continual backward-to-forward beam scanning of the proposed antenna is realized from 7.4 GHz to 10.05 GHz. A scanning range of 92° of the main-beam with the maximum gain of 14.4 dBi is achieved. The antenna gain of 14.2 dBi is achieved at broadside with no significant degradation, implying that the OSB is eliminated. The proposed antenna in this paper provides a new design scheme for the periodic microstrip LWAs.