An Extremely High Power X-Band Three-Port Circulator
- 1 March 1966
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 37 (3) , 1079-1080
- https://doi.org/10.1063/1.1708342
Abstract
The modifications of typical ferrite materials by either hot‐pressing or the addition of fast relaxing impurities are compared in a three‐port circulator. A standard MgMn ferrite with empirical formula Mn0.08Mg1.25Fe1.67O4± was tested in the three‐port circulator model. It showed an onset of nonlinear behavior at 20 kW. By hot‐pressing, the peak power level was extended to 200 kW with 0.1 dB rise in insertion loss, and to 500 kW with 0.25 dB increase in insertion loss. A gadolinium‐substituted garnet with empirical formula 3(Y0.6Gd0.4)·5(Fe)O12 was tested in the same geometry. It exhibited a threshold power level of 10 kW. A 4% substitution of dysprosium greatly extended the peak power handling capability of the three‐port circulator. No increase in insertion loss over low‐power readings was noted up to 500 kW peak.This publication has 2 references indexed in Scilit:
- Fine-Grained Ferrites. I. Nickel FerriteJournal of Applied Physics, 1961
- Effects of Rare Earth Impurities on Ferrimagnetic Resonance in Yttrium Iron GarnetPhysical Review Letters, 1959