Mitsubishi Denki Kabushiki Kaisha

Nippon Telegraph and Telephone Corporation

Kokusai Denshin Denwa Co., Ltd.

Nippon Telegraph

Telephone Corporation

Osami Ishida

Fumio Takeda

Moriyasu Miyazaki

Takashi Katagi

Koichi Tsunekawa

Makoto Matsunaga

Hideki Asao

Kenichi Kagoshima

Katsuhiko Aoki

Yoji Isota

Matsuichi Yamada

Fumio Itoh

Yoshihiko Yoshikawa

Keigo Komuro

Yoji Isoda

In order to perform feeding to an inverted F antenna having a plate conductor of an approximately rectangular shape for forming a radiation conductor and a ground conductor arranged in parallel with the plate conductor, a strip conductor plate connected to a feeder line is provided on the ground conductor via a dielectric substrate. Hence, the feeding from the feeder line to the inverted F antenna 37 is performed by an electric field coupling of the plate conductor and the strip conductor plate. The inverted F antenna and a resonator are integrated by coupling means to carry out an impedance matching, and the inverted F antenna and the resonator 62 constitute a band pass filter.

Antenna device having a band pass filter

In order to perform feeding to an inverted F antenna having a plate conductor of an approximately rectangular shape for forming a radiation conductor and a ground conductor arranged in parallel with the place conductor, a strip conductor plate connected to a feeder line is provided on the ground conductor via a dielectric substrate. Hence, the feeding from the feeder line to the inverted F antenna 37 is performed by an electric field coupling of the plate conductor and the strip conductor plate. The inverted F antenna and a resonator are integrated by coupling means to carry out an impedance matching, and the inverted F antenna and the resonator 62 constitute a band pass filter.

Inverted F antenna with non-contact feeding

A directional coupler having a main line and an auxiliary line each formed within a groove formed in a dielectric plate, having good directivity and capable of tight coupling.

Directional coupler

A crossed waveguide type polarization separator comprises a crossed waveguide for propagating orthogonal linear polarized waves, at least one conductor septum fitted in the crossed waveguide to totally reflect only one polarized wave in the linear polarized waves, at least one subwaveguide for receiving one linear polarized wave formed by the total reflection of the conductor septum, and a waveguide for receiving the other linear polarized wave which is not reflected by the conductor septum.

Crossed waveguide type polarization separator

Each of a transmitter and a receiver connected to an antenna through a duplexer includes a .pi./2 and a .pi. polarizer and an ortho-mode transducer (OMT) serially interconnected. In the receiver the OMT is connected at one output to a branching circuit and at the other output to a coupler which is connected to the branching circuit through a transfer circuit. In the transmitter, the OMT is connected at one input to a branching circuit and at the other input to a coupler subsequently connected to the branching circuit through a transfer circuit.

Antenna feed system

Growing community of inventors

Kanagawa, Japan

Osami Ishida