Reduced side lobe MM-wave leaky feeder transceiver by slot space optimization

Radiating cable (leaky feeder) is an attractive transceiver for short range broadband wireless access envisioned in mm-wave bands. A leaky feeder having slot antennas along its axis is a natural beam forming transceiver that eliminates the need for separate multiple antennas. However, the traditional radiating cable has equally spaced slots that give higher sidelobe energy. In this paper, slot spacing of a leaky feeder cable is optimized to minimize the side lobe level (SLL) and improve directionality. We propose a modified particle swarm optimization algorithm that shows an excellent reduction in the sidelobe energy compared to the conventional algorithm.