Ube Industries, Inc.

Takaki Ono

Ryozo Kitoh

Yoshiaki Fujiyama

Shotaro Hayashi

Atsunori Takasugi

A dielectric filter having a plurality of .lambda./4 coaxial dielectric resonators in stages, the resonator being filled with a dielectric material between its inner and outer conductors, comprising at least one stage in which the outer conductor of the .lambda./4 coaxial dielectric resonator is grounded via a capacitance or inductance. The dielectric filter is embodied as a low-pass filter, high-pass filter or a band-pass filter. As a result, by utilizing dielectric resonators having a desired resonant frequency, it is possible to readily achieve a dielectric filter having an attenuating pole in the neighborhood of the frequency passband and small in insertion loss.

Growing community of inventors

Yamaguchi, Japan

Takaki Ono