Meander-slot and U-slot antenna arrays for wide-band spatial power combiners

Abstract

In this letter, we present a multilayered waveguide transition containing several interacting printed antenna arrays for spatial power combining applications. Narrow-band resonant rectangular slot antennas used in earlier designs are replaced by meander-slot antennas and their modifications, in order to increase the frequency bandwidth and efficiency of the system. Numerical results for finite arrays of meander-slot and U-slot antennas show significant advantages in scattering characteristics in comparison to traditionally used rectangular slot antenna arrays.Index Terms-Meander-slot antenna, method of moments, spatial power combining, U-slot antenna, waveguide transition.