Analysis of omnidirectional waveguide slots array antennas

This paper proposes a new approach for analyzing waveguide slots and their arrays. It considers the whole waveguide structure with slots cut on conducting walls as a complete antenna system. Based on this idea, the electric field integral equation (EFIE) is formulated in a standard way, and the integral equation is then solved using the method of moments where the Rao, Wilton and Glisson (RWG) functions are employed as both basis and weighting functions in the Galerkin´s procedure. With the scheme implemented, longitudinal slot-pairs cut on the broad-wall are analyzed and their results newly obtained and discussed. The computed results theoretically show that the broad-wall longitudinal single slot-pair and slot-pair array can produce very good omnidirectional patterns in the E-plane.