A new microwave ring resonator using guided magnetostatic surface waves

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Abstract
A new microwave resonator based on guided magnetostatic surface waves is described. The waves are guided around a closed circular path by nonuniform in-plane fields. The ring resonator exhibits multiple resonances separated by approximately 10 MHz. Loaded Q’s as high as 1100 with 12 dB insertion loss and 1900 with 26 dB insertion loss have been observed. This resonator eliminates the fabrication complexity and losses associated with array reflector-type resonators and is potentially more compact since uniform fields over large sample areas are not required.

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