SECOND HARMONIC GENERATION USING FERRIMAGNETIC MATERIALS WITH MICROWAVE RESONATORS

An experimental and theoretical investigation of frequency doubling using ferrimagnetic materials with microwave resonators is presented. Theoreti cal and experimental results are correlated to obtain a better understanding of the process of frequency doubling with ferrimagnetic materials. The investigation started with an experimental in vestigation of a traveling-wave type frequency doubler. Polycrystalline strips of yttrium iron garnet and of Ferramic R-1 were placed in the traveling-wave type device. Although the effi ciency of the device was low, the experiments served their purpose by verifying the theory developed by Auld, et al. The traveling-wave device also served as a model for the more effi cient traveling-wave ferrite frequency doubler designed by Bady in which he utilized ferrimag netic materials with high anisotropy. (Author)