Analysis of a probe-metallic sleeve feed system for a rectangular waveguide

The author considers the problem of how to tune a probe in a rectangular waveguide. The tuning will be accomplished by surrounding the rectangular waveguide probe with a metallic sleeve. This problem is treated by a method-of-moments formulation generalized to include the presence of the metallic sleeve currents. The normalized input impedance that results from the antenna system under consideration when metallic sleeves of different dimension and position are placed in the rectangular waveguide is shown. The numerical results obtained suggest that a metallic sleeve can be used to tune the input impedance of a probe-fed rectangular waveguide.<>