caa a22 4500 463215303 CHVBK 20180405153154.0 cr unu---uuuuu 170326e20070601xx s 000 0 eng 10.1007/s00339-007-3872-5 doi (NATIONALLICENCE)springer-10.1007/s00339-007-3872-5 Hot electron injector Gunn diode for advanced driver assistance systems [Elektronische Daten] [A. Förster, M.I. Lepsa, D. Freundt, J. Stock, S. Montanari] This paper reviews the main aspects of the design, fabrication and characterization of GaAs Gunn diodes intended to be used in advanced driver assistance systems. The corresponding Gunn diode based oscillators operate at the microwave frequency of 77GHz and deliver an output power up to 19.2dBm (83.2mW). To fulfill the high demands of the automotive industry, temperature stability and a high grade of frequency purity, the Gunn diode structure includes a hot electron injector. This is based on the heteroepitaxy of a graded gap AlxGa1-xAs layer and an adjacent thin highly doped GaAs layer. The hot electron injector properties are investigated using dc and rf electrical measurements, including the temperature influence as well. Specific production related data of the cavity oscillators using our Gunn diodes are presented. New alternatives, such as the resonant tunneling emitter as a hot electron injector and the Gunn diode based MMIC as oscillator, are introduced. Springer-Verlag, 2007 Förster A. Aachen University of Applied Sciences, Jülich Campus, Ginsterweg 1, 52428, Jülich, Germany aut Lepsa M.I. Institute of Bio- and Nanosystems (IBN-1), Research Center Jülich GmbH, 52425, Jülich, Germany aut Freundt D. Division Automotive Electronics Business Unit Driver Assistance/Long Range Radar AE-DA/ELR, Robert Bosch GmbH, Daimlerstraße 6, 71229, Leonberg, Germany aut Stock J. Division Automotive Electronics Business Unit Driver Assistance/Long Range Radar AE-DA/ELR, Robert Bosch GmbH, Daimlerstraße 6, 71229, Leonberg, Germany aut Montanari S. Division Automotive Electronics, Quality Management Supplier (AE/QMS1), Robert Bosch GmbH, Tübinger Str. 123, 72703, Reutlingen, Germany aut Applied Physics A Springer-Verlag 87/3(2007-06-01), 545-558 0947-8396 87:3<545 2007 87 339 https://doi.org/10.1007/s00339-007-3872-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00339-007-3872-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Förster A. Aachen University of Applied Sciences, Jülich Campus, Ginsterweg 1, 52428, Jülich, Germany aut NATIONALLICENCE 700 1- Lepsa M.I. Institute of Bio- and Nanosystems (IBN-1), Research Center Jülich GmbH, 52425, Jülich, Germany aut NATIONALLICENCE 700 1- Freundt D. Division Automotive Electronics Business Unit Driver Assistance/Long Range Radar AE-DA/ELR, Robert Bosch GmbH, Daimlerstraße 6, 71229, Leonberg, Germany aut NATIONALLICENCE 700 1- Stock J. Division Automotive Electronics Business Unit Driver Assistance/Long Range Radar AE-DA/ELR, Robert Bosch GmbH, Daimlerstraße 6, 71229, Leonberg, Germany aut NATIONALLICENCE 700 1- Montanari S. Division Automotive Electronics, Quality Management Supplier (AE/QMS1), Robert Bosch GmbH, Tübinger Str. 123, 72703, Reutlingen, Germany aut NATIONALLICENCE 773 0- Applied Physics A Springer-Verlag 87/3(2007-06-01), 545-558 0947-8396 87:3<545 2007 87 339 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer