Murata Manufacturing Co., Ltd.

Akiko Kochi

Koichi Sakamoto

Shigeyuki Mikami

Kazutaka Mukaiyama

Hiroyasu Matsuzaki

Kiyoharu Kochi

Takahiro Baba

Yohei Ishikawa

A dielectric resonator device includes a dielectric substrate. Electrode films are formed on the front and back surfaces of the dielectric substrate, respectively. A TE010-mode resonator is constituted by two circular openings which oppose each other and which are formed in the electrode films. Two opposing slots formed in the electrode films constitute a planar dielectric transmission line (PDTL). The PDTL is connected to the TE010-mode resonator. An excitation section is formed by extending two portions of each electrode film on two side of each slot into each opening.

Dielectric resonator device, high frequency filter, and high frequency oscillator

A high-frequency circuit device includes a dielectric substrate. A planar conductor is provided on each of top and bottom surfaces of the dielectric substrate and a slot line is formed on the top surface. Also, undesired-wave propagation preventing circuits, each including multistage band-elimination filters, are provided on the top surface of the dielectric substrate, with the slot line therebetween. Each of the band-elimination filters includes two conductive lines and a resonator which is provided at a portion of one of the conductive lines and which includes two spiral lines. Accordingly, propagation of an undesired wave of the band whose center is the resonance frequency of the resonator can be prevented.

High-frequency circuit device and transmitter/receiver

Growing community of inventors

Ehime-ken, Japan

Akiko Kochi