Narrow-band MMIC filters with automatic tuning and Q-factor control

Author

Katzin, P. ; Bedard, B. ; Ayasli, Y.

Author_Institution

Hittite Microwave Corp., Woburn, MA, USA

fYear

1993

Firstpage

403

Abstract

Fully integrated, narrowband, tunable active filter monolithic microwave integrated circuits (MMICs) have been demonstrated at X-band. The three-section bandpass chip had a minimum insertion loss of less than 1.5 dB and a -3 dB bandwidth of 3% at 8.4 GHz. The notch filter chip exhibited a minimum -30 dB notch bandwidth of 20 MHz and a 2.7-GHz tuning range. A master-slave filter control circuit with fully integrated RF components was shown to track a reference signal over a frequency range greater than 2.5 GHz while maintaining the slaved filter notch depth at greater than 25 dB over that band. The same control circuit virtually eliminated the temperature dependence of the notch depth and provided a five-fold reduction in the notch frequency drift.<>

Keywords

MMIC; Q-factor; active filters; band-pass filters; microwave filters; notch filters; 20 MHz; 8.4 GHz; MMICs; Q-factor control; X-band; automatic tuning; fully integrated RF components; master-slave filter control circuit; minimum insertion loss; notch filter; notch frequency drift; reference signal; temperature dependence; three-section bandpass chip; tunable active filter; Active filters; Automatic control; Band pass filters; Bandwidth; Circuit optimization; Frequency; MMICs; Microwave filters; Narrowband; Q factor;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 1993., IEEE MTT-S International

Conference_Location

Atlanta, GA, USA

ISSN

0149-645X

Print_ISBN

0-7803-1209-0

Type

conf

DOI

10.1109/MWSYM.1993.276793

Filename

276793