TY - GEN
T1 - A half mode inkjet printed tunable ferrite isolator
AU - Ghaffar, Farhan A.
AU - Vaseem, Mohammed
AU - Bray, Joey. R.
AU - Shamim, Atif
N1 - KAUST Repository Item: Exported on 2020-10-01
PY - 2017/10/24
Y1 - 2017/10/24
N2 - 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.
AB - 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.
UR - http://hdl.handle.net/10754/626052
UR - http://ieeexplore.ieee.org/document/8059099/
UR - http://www.scopus.com/inward/record.url?scp=85032489142&partnerID=8YFLogxK
U2 - 10.1109/MWSYM.2017.8059099
DO - 10.1109/MWSYM.2017.8059099
M3 - Conference contribution
AN - SCOPUS:85032489142
SN - 9781509063604
SP - 289
EP - 291
BT - 2017 IEEE MTT-S International Microwave Symposium (IMS)
PB - Institute of Electrical and Electronics Engineers (IEEE)
ER -