Title :
Coplanar MMIC active bandpass filters using negative resistance circuits
Author :
Hopf, B. ; Wolff, I. ; Guglielmi, M.
Author_Institution :
Inst. fur Mobil- und Satellitenfunktechnik, Kamp-Lintfort, Germany
Abstract :
A second order active bandpass filter for a fixed centre frequency and a tunable one have been developed in a coplanar line technique using negative resistance circuits. These filters operate in the 1.8 GHz band and have a 3 dB bandwidth of 110 MHz. The tuning range of the centre frequency is 200 MHz. Each filter is fabricated on a GaAs substrate and occupies an area of 1.5/spl times/1.6 mm/sup 2/ on the wafer including all biasing elements.<>
Keywords :
MMIC; active filters; active networks; band-pass filters; microwave filters; negative resistance; tuning; 1.5 mm; 1.6 mm; 1.8 GHz; 110 MHz; GaAs; GaAs substrate; biasing elements; coplanar MMIC active bandpass filters; fixed centre frequency; negative resistance circuits; tunable centre frequency; wafer area; Band pass filters; Bandwidth; Circuit optimization; Frequency; Gallium arsenide; MMICs; Tunable circuits and devices; Tuning;
Conference_Titel :
Microwave Symposium Digest, 1994., IEEE MTT-S International
Conference_Location :
San Diego, CA, USA
Print_ISBN :
0-7803-1778-5
DOI :
10.1109/MWSYM.1994.335556
