Atr Optical & Radio Communications Research Laboratories

Atr Adaptive Communications Research Laboratories

Nobuaki Imai

Toshikazu Imaoka

Yoshio Karasawa

Yu Ji

Keizo Inagaki

Disclosed is an optical control type phased array antenna apparatus having an array antenna of antenna elements. An optical signal processor optically processes input high-frequency signals, and outputs optically processed signals including signal components having phases corresponding to directions in which radio wave signals come and having frequencies equal to those of the input high-frequency signals. Then, each frequency converter mixes a received signal with the optically processed signal in correspondence with the antenna element, and outputs a frequency-converted signal having a frequency of a difference between a frequency of the received signal and a frequency of the optically processed signal. Further, a combiner combines the frequency-converted signals. When reference signals each having a frequency that differs from the frequency of the corresponding radio wave signal by an intermediate frequency are inputted to the optical signal processor as the input high-frequency signals, intermediate frequency signals having the intermediate frequencies and corresponding to the radio wave signals are outputted as received signals from the combiner.

Optical control type phased array antenna apparatus equipped with

In a semiconductor device provided with a semiconductor substrate having two surfaces opposing to each other and having a circuit including a transistor having a plurality of electrodes, the circuit is formed on at least one of the two surfaces. Insulating films are formed on the two surfaces of the semiconductor substrate, respectively, and connecting electrodes are formed on a surface of the insulating film and electrically connected to the circuit. Further, a surface grounding conductor is formed on a surface of each of the insulating films so as to cover the surface of each of the insulating films except for portions where the connecting electrodes are formed. Accordingly, any possible interference of the circuit formed on the semiconductor device with the external circuit can be prevented.

Growing community of inventors

Yamatokouriyama, Japan

Nobuaki Imai