Computer‐aided development and experimental investigation of a double‐ridged orthomode transducer for modern satellite and space communication systems

Abstract

This article presents results of development, optimization, and experimental measurements of electromagnetic characteristics of a wideband orthomode transducer for satellite and space communications. Analyzed design of the transducer is based on a double‐ridged waveguide junction, which allows to obtain high level of discrimination of fundamental electromagnetic modes with perpendicular linear polarizations. Numerical modeling of the designed microwave waveguide orthomode transducer was performed by an effective finite elements method in the frequency domain. Optimization of the structure elements allowed to obtain high quality of matching and to improve the isolation between orthogonal polarizations simultaneously. To optimize the electromagnetic performance of the developed orthomode transducer a trust region method, which previously demonstrated its effectiveness for the improvement of electromagnetic characteristics of waveguide polarization converters, was applied. Experimental measurements of all scattering parameters of an antenna feed system, which included a designed orthomode transducer and a corrugated horn, were performed for the verification of simulated results. Results of computer‐aided modeling and of measurements are in agreement. Measured good matching and high level of isolation between orthogonal polarizations confirm effective electromagnetic performance of the developed orthomode transducer. Designed wideband waveguide device can be applied in modern microwave antenna systems operating simultaneously at two linear or circular polarizations of electromagnetic waves.

A high figure of merit of phonon-polariton waveguide modes with hbn/SiO2/graphene /hBN ribs waveguide in mid-infrared range

“…The swift development of optical technology has resulted in an increasing demand for small optical devices that offer high propagation and quality [ 1 ]. The manipulation of guided electromagnetic waves is of paramount importance in various fields, including nanophotonics, communications, analog computing, and integrated optics [ 2 , 3 ]. Optical waveguides can be categorized into two types: passive and active.…”

A high figure of merit of phonon-polariton waveguide modes with hBN/SiO 2 /graphene/hBN ribs waveguide in THz range

“…The manipulation of guided electromagnetic waves is of paramount importance in various fields, including nanophotonics, communications, analog computing, and integrated optics [1,2]. Traditional optical waveguides have been a standard for interconnecting with external power sources, testing, and packaging such as parallel plates waveguide, metallic rectangular waveguide, metallic circular waveguide, slot lines, stripline, photonic crystal waveguides and ribbon waveguides [3].…”

Electromagnetic Performance of Waveguide Polarizers with Sizes Obtained by Single-Mode Technique and by Trust Region Optimization

“…The applied antenna system must contain specific types of microwave waveguide devices [8,9] to provide a possibility to operate at circular polarization. Namely, these devices are orthomode duplexers [10][11][12] and waveguide polarization converters [13,14]. One of the common types of waveguide polarization transforming devices is polarizers with conducting metal septum plates.…”