Scattering analysis for a circular to rectangular T‐junction

Abstract

The reflection and transmission characteristics of a circular‐to‐rectangular single T‐junction are analyzed. The techniques of Fourier transform and mode matching are used for the analysis. An approximate dominant‐mode solution is derived in a closed form. Computations show that our result is numerically efficient and accurate, and thus will be useful for practical application. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 41: 231–234, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20102

Design and Measurement of a Broadband Sidewall Coupler for a W-Band Gyro-TWA

“…The general geometry of the single-hole side-wall coupler is a rectangular-to-circular T-junction. It is a basic microwave structure that can be used in applications such as an ortho-mode transducer (OMT) [12], polarizer and microwave filter [13]. The scattering parameters of the rectangular-to-circular T-junction can be efficiently calculated by several methods, such as finite-difference time-domain (FDTD), finite-element method (FEM), or mode matching method [14], [15].…”

“…The scattering parameters of the rectangular-to-circular T-junction can be efficiently calculated by several methods, such as finite-difference time-domain (FDTD), finite-element method (FEM), or mode matching method [14], [15]. If only the transmission coefficient from the TE 10 mode of the rectangular waveguide to the TE 11 However, the T-junction is a symmetrical structure between port 2 and 3, which means the transmission coefficient between port 1 and 2 (S mode of the circular waveguide needs to be calculated, a simple equation as described in paper [13] can be used to quickly predict the performance.…”

Numerical Analysis of Cylindrical Cavities Used for Microwave Heating, Employing the Mode Matching Technique

“…Regarding the two apertures at the side walls of the cavity aiming at the introduction of the material to be heated in the cavity, these are also analyzed using the same method as proposed in [6]. It consists of a T-junction between a cylindrical and a rectangular waveguide, while the suppression of the energy leakage is made using λ/4 rectangular waveguide chokes.…”