Kyocera Corporation

Akira Nakayama

Hiromichi Yoshikawa

Kenji Kitazawa

Shinichi Koriyama

Tatsuji Furuse

Masanobu Ishida

Shuji Nakazawa

Koichi Nagata

Hidehiro Minamiue

Takanori Kubo

Naoyuki Shino

Seiichi Hirahara

Shigeki Morioka

Akira Imoto

A dielectric resonator is arranged such that an upper electrodeand a lower electrodeare disposed on both surfaces of a dielectric substratethat has an interior metallized layer inside thereof, which is formed with a resonance aperture area. A dielectric filter is produced by arranging a plurality of rows of the dielectric resonators, and using a multilayer-type waveguideformed by lines of via conductors for signal input and output. This dielectric filter allows the accuracy for designing resonant frequencies to be greatly improved and the production process to be simplified.

Dielectric filter and wireless communication system

A circuit substrate in which the conductor portions constituting the functional devices formed in the insulating board have interfacial electric conductivities &sgr; of not larger than 2.90&times;10 &OHgr; &middot;m to greatly lower the insertion losses.

Circuit substrate

A high-frequency module in which a plurality of cavities are formed on the surface of a dielectric board, internal high-frequency signal transmission lines are connected to high-frequency devices in the cavities and are located in the cavities, the internal high-frequency signal transmission lines being electromagnetically coupled to the external high-frequency signal transmission line, and the high-frequency devices in the cavities are connected to each other relying on the electromagnetic coupling through the external line. The high-frequency module enables high-frequency signals to be transmitted among the high-frequency devices with a small loss. The module has a very simple structure, and is cheaply produced, and offers an advantage that it can be easily obtained in a small size.

High-frequency module coupled via aperture in a ground plane

Growing community of inventors

Kokubu, Japan

Akira Nakayama