WPT Performance Analysis on Antenna Height Dependency between Circuit-Shape Leaky Waveguide and λ/2 Wavelength Dipole Antenna

Antenna height dependency of the wireless power transmission (WPT) performance between a circuit-shape leaky waveguide and a λ /2 wavelength dipole antenna was simulated by the FDTD method. Microwave snow melting using microwave heating have been proposed to reduce snow removal workloads [1] . As a device to radiate microwaves to melt snow, the circuit-shape leaky waveguide with slot openings was proposed [2] . A pair of straight waveguides with slots and a pair of semicircular waveguides were connected in series like a car circuit so that a power fed from a feeding point could travel along the circuit-shape waveguide. The waveguide’s cross section was in line with WR-430. The feeding point was set at near one of borders between the straight and semicircular parts. Their S -parameters between the waveguide and a λ /2 dipole antenna located 15-mm or 30-mm above the waveguide were simulated by the FDTD method, from which WPT efficiencies were calculated.