A novel thin film type hybrid transmission-line device with a magnetic/dielectric multilayer structure was developed. The magnetic/dielectric hybrid micro strip-line consisted of a top aluminum strip line, the CoZrNb/polyimide multilayer structure, and bottom aluminum ground plane on the Al/sub 2/O/sub 3/ substrate. The hybrid microstrip-line exhibited a large wavelength shortening effect. For example, the wavelength ratio of the hybrid transmission-line and free space was below 7%. Therefore, a quarter wavelength distributed constant line device, such as impedance converter, balun and filter, will be miniaturized using the new hybrid transmission-line, because of its large wavelength shortening effect.
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Ikeda et al. (2001) studied this question.
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