Two-port FET oscillators with applications to active arrays

Author

Birkeland, Joel ; Itoh, Tatsuo

Author_Institution

Dept. of Electr. & Comput. Eng., Texas Univ., Austin, TX, USA

Volume

1

Issue

5

fYear

1991

fDate

5/1/1991 12:00:00 AM

Firstpage

112

Lastpage

113

Abstract

Investigations of two-port FET oscillators and their use in active arrays for spatial power combining are reported. The two-port oscillator considered consists of a single FET oscillator with distinct input and output ports. This type of oscillator exhibits increased locking bandwidth over alternative approaches. Results are given for a prototype five-element linear array operating at 6 GHz. In this case, the entire array is synchronized by a single injection signal supplied to the first oscillator. The array exhibited a locking bandwidth of greater than 500 MHz with a 0-dBm injection signal. However, the radiation pattern had sidelobe levels below -10 dB for only 300 MHz of this range. Variation of the main lobe with frequency is shown. The main lobe direction variation is about 7% per 100 MHz of frequency change.<>

Keywords

field effect transistor circuits; microwave oscillators; solid-state microwave circuits; synchronisation; 500 MHz; 6 GHz; SHF; active arrays; five-element linear array; locking bandwidth; spatial power combining; two-port FET oscillators; Bandwidth; Circuits; FETs; Frequency; Helium; Injection-locked oscillators; Linear antenna arrays; Output feedback; Receiving antennas; Transmission line matrix methods;

fLanguage

English

Journal_Title

Microwave and Guided Wave Letters, IEEE

Publisher

ieee

ISSN

1051-8207

Type

jour

DOI

10.1109/75.89080

Filename

89080