Daimler Chrysler Ag

Eads Deutschland Gmbh

Helmut Leier

Heinz-Peter Feldle

Wolfang Menzel

Hyunchol Shin

Christoph G&auml;ssler

Marc Schreiner

A radar system with a phase controlled antenna array that contains a number of data and supply networks (), which are installed so that they are interchangeable, and a transmit/receive module () containing a transmitter and receiver circuit () as well as a number of circulator circuits () and a number of antenna elements () that are coupled via a circulator circuit () to the transmitter and receiver circuit (). Transmitter and receiver circuits (), circulator circuits (), and antenna elements () are combined in each transmit/receive module () and the transmit/receive modules () are arranged interchangeably on the radiation side of the radar or EW system ().

Amplitude and phase-controlled antennas-subsystem

A method for producing a heterobipolar transistor, arranged on a substrate of semiconductor material on which is grown a semiconductor sequence for a collector, a base and an emitter, which method includes: etching the layer sequence to form a transistor with a mesa structure, carrying out a first planarizing step to the upper limit of the base during which the surface of the base is protected by a protecting portion of the emitter layer adjacent to the base; removing this protective layer; depositing a metal contact layer for the base; carrying out a second planarizing step for the base emitter mesa; and finally depositing a connecting metallization layer for the collector, base and emitter.

Method for producing a heterobiopolar transistor

Growing community of inventors

Gruibingen, Germany

Helmut Leier