Millimeter-Wave Substrate Integrated Waveguide Long Slot Leaky-Wave Antennas and Two-Dimensional Multibeam Applications

摘要: Two types of substrate integrated waveguide (SIW) long slot leaky-wave antennas with controllable sidelobe level are proposed and demonstrated in this paper. The first prototype is able to achieve an excellent -27.7ndB by properly meandering a etched on the broadside straight SIW section from centerline toward sidewall then back. But it known that asymmetrically curved would worsen cross-polar level. To overcome drawback, modified antenna proposed, which has section. It yields outstanding -29.3 dB also improves more than 11 at 35 GHz. Experimental results agree well simulations, thus validating our design. Then, two-dimensional (2-D) multibeam developed combining such 14 beamforming network (BFN). features scanning both elevation orientation varying frequency cross-plane direction using BFN. Excited ports 1-10 2-D GHz, angular region 86.6° azimuth can effectively be covered 3 beam-width ten pencil beams. Varying 33 GHz 37 37.5° 38.9° those continuous beams excited 6 8 respectively.