Accession Number : AD0776773

Title :   Load Impedance Characteristics of TRAPATT Oscillators.

Descriptive Note : Technical rept.,

Corporate Author : MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB

Personal Author(s) : Welch,Jerry D.

Report Date : 09 JUL 1973

Pagination or Media Count : 125

Abstract : A study was made of the impedance required to match the diode in a time-delay-triggered TRAPATT oscillator. The investigation includes both a theoretical analysis and an experimental verification. It provides the most accurate closed-form analysis of TRAPATT oscillator waveforms and efficiencies to date and resolves inconsistencies in the dynamics of the time-delay-triggering processes which have not been adequately explained in previously published analyses. A technique is given for determining the required diode matching impedance and presenting the impedance data in a single set of resistance and reactance curves valid for any fundamental frequency of oscillation. The analysis includes the parasitics of the package and mount and shows that the required matching impedance is strongly influenced by these parasitics; without them the chip itself would be a very broadband device. (Modified author abstract)

Descriptors :   *MICROWAVE OSCILLATORS, *AVALANCHE DIODES, ELECTRICAL IMPEDANCE, IMPEDANCE MATCHING, COMPUTER PROGRAMS, THESES

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE