F. Lenk , M. Schott, J. Hilsenbeck, and W. Heinrich

Published in:

IEEE MTT-S Int. Microwave Symp. Dig., 2004, pp. 1341-1344.

Abstract:

In this paper, optimization of the loaded quality factor Q_L for reflection-type HBT oscillators is investigated. Main result is an optimum relation between the S parameter phases at the three transistor ports. To support this finding, a 35.5 GHz MMIC VCO phase-noise better then -85 dBc/Hz at 100 kHz offset frequency is require efforts not only to keep reflections low but demonstrated.

Index Terms:
Q factor, Microwave oscillators, MMIC oscillators, Voltage controlled oscillators, Heterojunction bipolar transistors

© 2004 The IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.

Full version in pdf-format.