Title :
An MMIC twin-tee active bandpass filter
Author :
Rosenbaum, F.J. ; Gregory, R.O. ; Richard, W.D. ; Ou, W. ; Kuhns, F.G. ; Trimble, T.M.
Author_Institution :
Washington Univ., St. Louis, MO, USA
Abstract :
The design and performance of an MMIC (monolithic microwave integrated circuit) active bandpass filter based on a twin-tee notch circuit are described. Design goals included a center frequency of 2 GHz and a Q that could be varied to well over 100. The device was fabricated in GaAs using 150- mu m transistors. Die size is approximately 1 mm/sup 2/, and power dissipation is approximately 180 mW. Although Q values meet expectations, the measured center frequency (1.35 GHz) is low. Speculation as to the cause of the difference focuses on the capacitance values of the twin-tee circuit.<>
Keywords :
MMIC; active filters; band-pass filters; microwave filters; notch filters; 1.35 GHz; 180 MW; 2 GHz; MMIC; Q values; active bandpass filter; capacitance values; center frequency; die size; power dissipation; twin-tee notch circuit; Band pass filters; Frequency; Gallium arsenide; MMICs; Microwave devices; Microwave integrated circuits; Microwave transistors; Monolithic integrated circuits; Power dissipation; Q measurement;
Conference_Titel :
Microwave Symposium Digest, 1993., IEEE MTT-S International
Conference_Location :
Atlanta, GA, USA
Print_ISBN :
0-7803-1209-0
DOI :
10.1109/MWSYM.1993.276803
