Abstract

A microwave-propagating structure has been investigated which is composed of a periodic, linear array of coupled YIG spheres operating in the uniform precession mode. Theoretical and experimental data on the propagation characteristics are presented. Both forward and backward types of waves exist. The system has characteristics of an electronically controllable filter and delay line whose properties are controlled by varying the applied dc magnetic field. Delay times in the nanosecond to microsecond range, with control of group velocities over a range of 5 to 1 or more, at signal attenuations on the order of 0.03 dB/nsec of total delay, appear possible.

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