Accession Number : ADA303510

Title :   Artificial Nonlinear Dielectrics for THz/subpicosecond Generation.

Descriptive Note : Final rept. 30 Sep 92-31 Jul 95,

Corporate Author : CALIFORNIA UNIV SANTA BARBARA DEPT OF ELECTRICAL AND COMPUTER ENGINEERING

Personal Author(s) : Rodwell, Mark

PDF Url : ADA303510

Report Date : 22 DEC 1995

Pagination or Media Count : 30

Abstract : During the period of the grant the following devices have been developed and experimental results obtained: (1) Shock wave nonlinear transmission line (NLTL) pulse generators and NLTL grated sampling circuits have been built with 0.48 PS risetimes and 725 GHz bandwidths; (2) Development of 500-100 GHz Schottky collector Heterojunction Bipolar Transistors were pursued, including device design, mask layout, and two generations of devices fabricated. At the time of the contract end, devices with 120 GHz bandwidths were obtained; (3) Active probes (using NLTL technologies) have been constructed for on wafer mm wave network analysis, and measurements demonstrated over a 10-200 GHz bandwidth. The system was then demonstrated with extensive measurements of advanced high speed ICs; (4) Antenna coupled 0.1 micron Mott switching diodes with circuit limited bandwidths beyond S THz were fabricated; (5) Traveling wave resonant tunnel diode pulse generators were designed, fabricated, and tested. These produced transients with 3.8 ps measured risetimes.

Descriptors :   *TRAVELING WAVE TUBES, *BIPOLAR TRANSISTORS, *TUNNEL DIODES, HETEROJUNCTIONS, DIELECTRICS, TRANSMISSION LINES, PULSE GENERATORS, CIRCUITS, BANDWIDTH, MASKS.

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE