@inproceedings{982e7a0eed0945b19ff7f3a2ca96241c,
title = "A half mode inkjet printed tunable ferrite isolator",
abstract = "A novel half mode waveguide based ferrite isolator design is presented in this work. For the first time, tunability of the isolation band is demonstrated for a ferrite isolator. Instead of using the conventional antisymmetric bias the isolator requires a single direction of the magnetic bias field due to the half mode operation. Yttrium Iron Garnet (YIG) is used as the substrate for the device. The metallic walls of the waveguide are realized using inkjet printing. The magnetic biasing applied to the waveguide causes the RF waves to experience negative permeability in one direction of propagation hence providing isolation for this direction. For an applied bias of 3000 Oe, the device provides a maximum isolation figure of merit of 76.7 dB at 7.5 GHz. The isolation band can be controlled by changing the applied magnetostatic bias. As the bias is varied from 1500 Oe to 3500 Oe the center frequency of the isolation band varies from 4.45 GHz to 9 GHz. The measured response of the isolator shows that it can be integrated in any RF system requiring lower cost and good isolation.",
keywords = "Ferrite, Isolator, Isolator figure of merit (IFM), Waveguide",
author = "Ghaffar, {Farhan A.} and Mohammed Vaseem and Bray, {Joey. R.} and Atif Shamim",
note = "Publisher Copyright: {\textcopyright} 2017 IEEE.; 2017 IEEE MTT-S International Microwave Symposium, IMS 2017 ; Conference date: 04-06-2017 Through 09-06-2017",
year = "2017",
month = oct,
day = "4",
doi = "10.1109/MWSYM.2017.8059099",
language = "English (US)",
series = "IEEE MTT-S International Microwave Symposium Digest",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "289--291",
booktitle = "2017 IEEE MTT-S International Microwave Symposium, IMS 2017",
address = "United States",
}