By Topic

Ferrite-Filled Antisymmetrically Biased Rectangular Waveguide Isolator Using Magnetostatic Surface Wave Modes

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
$31 $13
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)

The complex dispersion diagram of an antisymmetrically biased ferrite-filled rectangular waveguide (RWG) is investigated, revealing that the waveguide supports a band-limited unidirectional magnetostatic surface wave mode. This mode is subsequently used to design a novel RWG isolator. A parametric analysis including loss is performed to characterize the isolation band. A prototype waveguide isolator has been fabricated using a small metallized ferrite substrate measuring 30-mm long, 6-mm wide, and 0.8-mm high. Measurements in the 10-20-GHz range confirm the theory and mark the first time that a ferrite isolator has been built using a completely filled RWG. The fabricated 6-mm-long waveguide isolator provides a peak isolation figure-of-merit (IFM) of 42.5 dB at 15.4 GHz. An IFM of over 16.2 dB is sustained from 15.2 to 18.3 GHz (18.5% bandwidth). The simplicity of this compact isolator makes it amenable to package-scale integration, such as in ferrite low-temperature co-fired ceramic, where it could be readily embedded within a multichip package.

Published in:

Microwave Theory and Techniques, IEEE Transactions on  (Volume:58 ,  Issue: 6 )