Design and experimental verification of ridge gap waveguides in bed of nails for parallel plate mode suppression
Journal article, 2011

This study describes the design and experimental verification of the ridge gap waveguide, appearing in the gap between parallel metal plates. One of the plates has a texture in the form of a wave-guiding metal ridge surrounded by metal posts. The latter posts, referred to as a pin surface or bed of nails, are designed to give a stopband for the normal parallel-plate modes between 10 and 23 GHz. The hardware demonstrator includes two 90 bends and two capacitive coupled coaxial transitions enabling measurements with a vector network analyser (VNA). The measured results verify the large bandwidth and low losses of the quasi-transverse electromagnetic (TEM) mode propagating along the guiding ridge, and that 90 bends can be designed in the same way as for microstrip lines. The demonstrator is designed for use around 15 GHz. Still, the ridge gap waveguide is more advantageous for frequencies above 30 GHz, because it can be realised entirely from metal using milling or moulding, and there are no requirements for conducting joints between the two plates that otherwise is a problem when realising conventional hollow waveguides.

Author

Per-Simon Kildal

Chalmers, Signals and Systems, Kommunikationssystem, informationsteori och antenner, Antennas

Ashraf Uz Zaman

Chalmers, Signals and Systems, Kommunikationssystem, informationsteori och antenner, Antennas

Eva Rajo

Chalmers, Signals and Systems, Kommunikationssystem, informationsteori och antenner, Antennas

Esperanza Alfonso Alos

Chalmers, Signals and Systems, Kommunikationssystem, informationsteori och antenner, Antennas

A. Valero-Nogueira

Polytechnic University of Valencia (UPV)

IET Microwaves, Antennas and Propagation

1751-8725 (ISSN)

Vol. 5 3 262-270

Areas of Advance

Information and Communication Technology

Subject Categories

Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.1049/iet-map.2010.0089

More information

Latest update

3/6/2018 1