By Topic

Fringing effects in re-entrant and inverted re-entrant turnstile waveguide junctions using cylindrical resonators

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $33
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
J. Helszajn ; Department of Electrical and Electronic Engineering, Heriot-Watt University, Edinburgh, Scotland ; J. Sharp

One waveguide network is a five-port turnstile junction consisting of three H-plane waveguides with a circular quarter-wave long resonator on its axis, open circuited at one end and short circuited at the other. It is readily converted to a turnstile three-port circulator by replacing the dielectric resonator by a gyromagnetic one and closing two of the five ports. Another network that may be reduced to a three-port circulator is a seven-port turnstile junction containing a pair of similar coupled resonators or a half-wave long arrangement open circuited at each end. The introduction of suitable symmetry planes in the latter two geometries suggests that all three have, in the absence of any fringing effects, the same centre frequency. In practice, however, this is not so. This study employs an finite element (FE) process to investigate this assumption in the cases of re-entrant and inverted re-entrant resonators. One conclusion of this work is that an FE or similar numerical tool is mandatory for the adjustment of such a degree-2 circuit.

Published in:

IET Microwaves, Antennas & Propagation  (Volume:5 ,  Issue: 9 )