Matsushita Electric Industrial Co., Ltd.

Tsuneo Danno

Tooru Tamura

Masashi Kanno

Toyota Noguchi

Hiroshi Ikushima

Eiichiro Murata

A synchronization system for a spread spectrum communication receiver generates a receiving code sequence which is identical to an input code sequence and then varies the timing of the receiving code sequence using a correlator until the two code sequences are correlated.

Code sequence synchronization system for spread spectrum communication

This invention provides an elastic surface wave device utilizing Bluestein-Gulyaev wave and constructed by a unitary body of a piezoelectric plate having a plurality of transducers thereon, wherein the wave propagation surface being coated with an insulating rubber and being embedded in molding by an insulating powdered epoxy resin, or whose body is attached on a unitary supporting substrate via double adhesive layers; wherein one layer is composed of one kind of adhesive resin and the other is composed of another kind of adhesive resin different from the former in ultrasonic property. This device is advantageous because it has a low spurious signal level without increasing insertion loss, and is easy to manufacture and inexpensive. This invention also provides an effective method for making the device.

Growing community of inventors

Moriguchi, Japan

Tsuneo Danno