Bandwidth Study of the Microwave Reflectors with Rectangular Corrugations

Abstract

The mode-selective microwave reflector with periodic rectangular corrugations in the inner surface of a circular metallic waveguide is studied in this paper. The relations between the bandwidth and reflection coefficient for different numbers of corrugation sections were studied through a global optimization method. Two types of reflectors were investigated. One does not consider the phase response and the other does. Both types of broadband reflectors operating at W-band were machined and measured to verify the numerical simulations.

Systematic study of a corrugated waveguide as a microwave undulator

“…The corrugated waveguide contains circular waveguide steps and smooth sections. The properties of a corrugated waveguide with arbitrary radial corrugation depth can be accurately solved using a mode-matching method (James, 1981;Neilson et al, 1989;Zhang et al, 2016). For the periodically corrugated waveguide used for transmitting the microwave power, analytical equations can be derived based on the fact that the waveguide radius is larger than the wavelength.…”

Microwave Undulator Using a Helically Corrugated Waveguide

“…In this case, the HCW can be further simplified as an axisymmetric waveguide with steps. Such a TE 11 mode reflector has been studied using a mode-matching method [26]. In this study the general case that ≠ 0 was chosen to provide a systematic study of the HCW dimensions based on the selected operating modes and the conclusions are also valid for the particular case of = 0.…”

Design of a spline horn for a W-band gyro-TWA

“…The profile of the spline horn was optimized by using a multiple-objective optimization method [12]. Two goal functions were used in the optimization.…”