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Unidirectional Paramagnetic Amplifier Design

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1 Author(s)
Strandberg, M.W.P. ; Res. Lab. of Electronics, Mass. Inst. Tech., Cambridge, Mass.

The radio-frequency parameters and the quantummechanical parameters entering into the design of paramagnetic quantum-mechanical amplifiers are described and discussed. The physical and electrical limitations on such parameters as gain-bandwidth product, gain stability, and nonreciprocity are described analytically and with design curves. Two realizations of nonreciprocal amplifiers are described and discussed. In particular, operation of a nonreciprocal amplifier at 9 kmc is described. Explanations for the observed properties of previously reported amplifiers are given, and the steps necessary to achieve high gain-bandwidth product and nonreciprocity with paramagnetic amplifiers are described.

Published in:

Proceedings of the IRE  (Volume:48 ,  Issue: 7 )