Mitsubishi Denki Kabushiki Kaisha

Yasuhiko Nishioka

Kazuyoshi Inami

Nobutake Orime

Hazime Kawano

Takashi Katagi

Toshihiko Aoki

Yoshiyuki Chatani

Toshio Masujima

Susumu Hishinuma

Morio Higa

Takayoshi Huruno

Koushi Ogiso

Akira Harada

Masahiko Funada

An antenna system for transmitting radio waves in the same direction as the direction of arrival of incoming radio waves. The arrival direction is detected by a fast Fourier transform processor. The transmitting direction is adjusted by phase-shifting radio waves from a feeder on the basis of the detected arrival direction. Further, signals in the system are transmitted through optical fibers in order to decrease the processing time.

Antenna system

A radiowave receiving array antenna includes a lower grounding conductor, an upper grounding conductor, and supporting plates for supporting a feeder circuit board therebetween. Radiation elements and low noise amplifiers are mounted on the same plane of an insulating film of the feeder circuit board. The number of radiation elements is reduced, but the quality of the signal is not deteriorated.

Array antenna with radiation elements and amplifiers mounted on same

An integrated circuit package having enhanced mounting density is provided. The package includes a microwave integrated circuit and a drive circuit therefor, both accommodated in a casing having a layer structure made of a multi-layer ceramic. Through holes in a multi-layer ceramic are utilized for wiring so that the number of conductive tracks provided on the same plane can be reduced and the mounting density can be enhanced. The integrated circuit and the drive circuit are disposed in the casing vertically with respect to each other to reduce the overall longitudinal dimension of the package and enhance mounting density. High frequency connectors adapted to feed high frequency signals to the integrated circuit, and connector pins adapted to supply external control signals and a power signal to the drive circuit, are connected on the underside surface of the casing. A through hole of a horse shoe type is formed through one of the dielectric members, and metallic material is filled therein to provide an external conductor for coaxial tracks. Alternatively, this through hole can be processed by plating or the like to improve the electrical characteristics.

Microwave integrated circuit mountings

An antenna system comprises a plurality of element antennas for both transmission and reception of signals, which are constituted on an optical profile surface and are divided into a plurality of blocks, each including at least more than two element antennas; a plurality of miniature transmitters/receivers connected respectively to the plurality of element antennas, which are adapted to switch between a transmission mode and a reception mode, to control the phase shift of transmission signals and amplify the controlled transmission signals in the transmission mode or to control the phase shift of reception signals and amplify the controlled reception signals; a plurality of power supply circuits connected respectively to the plurality of blocks, each of which is adapted to distribute the transmission signals to the corresponding block, or to synthesize the reception signal from the corresponding block; a plurality of reception signal converting units connected respectively to the plurality of power supply circuits each of which comprises a transmission signal/reception signal switching unit, a frequency converter, a band-pass filter, an analog/digital converter and an electro/optical converter, which are connected in series, so as to output optical digital signals of the reception signals; and a signal processing unit responsive to the optical digital signals for calculating the required antenna performance.

Growing community of inventors

Kanagawa, Japan

Yasuhiko Nishioka