Analysis of an Inclined Semi-Circular Slot in the Narrow Wall of a Rectangular Waveguide

Abstract

Abstract-An inclined semi-circular slot cut in the narrow wall of a rectangular waveguide has been analyzed. By enforcing the boundary condition of continuity of the tangential magnetic field at the slot aperture, an integral equation with the aperture electric field as the unknown has been obtained and solved by the method of moments (MoM). The equivalent slot admittance is then determined. Different slot parameters, such as scattering coefficients, normalized resonant conductance, resonant length versus tilt angle, and radiation patterns, have been studied. The results obtained by the MoM have been verified by comparing them against those results obtained with HFSS.

A Spiral Shaped Slot as a Broad-Band Slotted Waveguide Antenna

“…Different slot shapes have been proposed recently for SWA array application. For example, an inclined semi-circular slot cut in the narrow wall of a rectangular waveguide was proposed for X-band arrays [15]; however, this antenna is narrowband. In [16] a travellingwave sinusoidal SWA was applied to the short-wall of a waveguide and proposed for operation in the Ka-band.…”

Prediction of the Electromagnetic Field in Metallic Enclosures Using Artificial Neural Networks

“…However, in most practical applications, slots, holes, and even apertures have to be created on the walls of the enclosure for signal wiring, power supply, and heat dispersion. Unfortunately, these structures create EM energy coupling paths that allow external EM field to propagate into the enclosure, thus they degrade the shielding effectiveness [1][2][3][4][5][6]. In addition, the internal circuits which can produce EM radiation will increase the EM complexity significantly in the metallic enclosure.…”