Analysis of untilted edge slots excited by tilted wires

Theoretical and experimental studies of untilted edge slots excited by tilted wires are presented. The basic unit in an array of such sidewall slots consists of a single nonwraparound slot plus two internal straddling wires. Both theory and experiment predict the coupling of energy from the waveguide into a half-space. Furthermore, the passage of the phase of the reflection coefficient through 180 degrees indicates that the slot/strips combination exhibits a resonant behavior and acts like a shunt element that can be detuned to compensate for mutual coupling. This unit appears to be an attractive new candidate for use in arrays where large-angle H-plane scanning is desired.<>