Design and analysis of a Ka-band coaxial-to-quad-ridged circular waveguide transition

Author

Silva, J.S. ; Lima, Eduardo B. ; Costa, Jorge R. ; Fernandes, Carlos A. ; Mosig, Juan R.

Author_Institution

Lab. of Electromagn. and Acoust., Ecole Polytech. Fed. de Lausanne, Lausanne, Switzerland

fYear

2014

fDate

6-11 April 2014

Firstpage

7

Lastpage

9

Abstract

A new coaxial-to-quad-ridged circular waveguide transition is presented which works simultaneously in the downlink (20 GHz) and uplink (30 GHz) Ka-bands. The transition comprises a double-ridge section with a back cavity fed by a coaxial probe and a transitional section where the second pair of ridges is added. The device open-end has equal symmetry planes in order to allow feeding previously designed dual-linear polarization quad-ridged devices selecting either linear polarization simply by rotating this launcher by 90°. The same procedure can be used for circular polarization with postprocessing. Reflection level at the coaxial port is below -10 dB for the whole band. The overall length of the designed coaxial-to-waveguide transition is 48.1 mm. The proposed transition was simulated with CST Microwave Studio and HFSS.

Keywords

circular waveguides; coaxial waveguides; electromagnetic wave polarisation; microwave circuits; millimetre wave circuits; ridge waveguides; waveguide transitions; CST Microwave Studio; HFSS; Ka-band coaxial-to-quadridged circular waveguide transition; back cavity fed; circular polarization; double-ridge section; dual-linear polarization quadridged device; equal symmetry plane; frequency 20 GHz; frequency 30 GHz; size 48.1 mm; Antennas; Electromagnetic waveguides; Europe; Lenses; Polarization; Tuning; Waveguide transitions; Ka-Band; Satellite communicatios; broadband transition; coaxial-to-waveguide transition;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation (EuCAP), 2014 8th European Conference on

Conference_Location

The Hague

Type

conf

DOI

10.1109/EuCAP.2014.6901678

Filename

6901678