A K-band monolithic oscillator integrated with a buffer amplifier using a device-circuit interaction design concept

Author

Maruhashi, Kenichi ; Madihian, Mohammad ; Desclos, Laurent ; Ouda, K. ; Kuzuhara, Masaaki

Author_Institution

Kansai Electron. Res. Lab., NEC Corp., Shiga, Japan

Volume

44

Issue

8

fYear

1996

fDate

8/1/1996 12:00:00 AM

Firstpage

1424

Lastpage

1428

Abstract

We report on a high power, high efficiency, and small-size monolithic coplanar waveguide oscillator incorporating a single-stage buffer amplifier on the same chip. For the oscillator design, by changing RF current level through the device, the optimum load line was chosen in order to have an oscillation frequency insensitive to the effect of the subsequently connected amplifier, based on a device-circuit interaction concept. The amplifier, on the other hand, which was driven directly by the oscillator, was designed to achieve an overall high power and high efficiency operation. At 21 GHz, the output power of the developed chip recorded 17 dBm with an overall DC-RF efficiency of 22%. By changing the length of a source feedback line, the oscillation frequency was varied from 21 GHz to 26 GHz. For all cases, the output power remained higher than 16 dBm

Keywords

MMIC amplifiers; MMIC oscillators; buffer circuits; coplanar waveguides; feedback oscillators; 21 to 26 GHz; 22 percent; K-band monolithic oscillator; SHF; buffer amplifier; coplanar waveguide; device-circuit interaction design; monolithic CPW oscillator; oscillation frequency; single-stage amplifier; source feedback line; Coplanar waveguides; Feedback; High power amplifiers; K-band; Operational amplifiers; Oscillators; Power amplifiers; Power generation; Radio frequency; Radiofrequency amplifiers;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.536025

Filename

536025