Title :
Narrowband MMIC Filters using Active GaAs Inductors. Application to HDTV
Author :
Vanabelle, E. ; Descamps, P. ; Vindevoghel, J.
Author_Institution :
Institut d´´Electronique et de Microélectronique du Nord, Département Hyperfréquences et Semiconducteurs, U.M.R C.N.R.S 9929, Avenue Poincaré - BP 69, 59652 Villeneuve d´´Ascq Cedex France. Phone: (33)3 20 19 79 31 Fax: (33)3 20 19 78 96, E-mail: Eric
Abstract :
In this paper, we describe a monolithic microwave active inductor to be implanted in tunable filters. The novel active inductor operating at 22 GHz has been achieved using 0.2 ¿m GaAs P-Hemt technology [1]. An unloaded resonator quality factor up to 2500 has been measured at 21.96 GHz. The inductance value and Q factor can be voltage tuned through the gate and drain biasing. Several types of MMIC filters around 22 GHz were designed, realized and fully characterized in K-band. The best performances obtained for a band-pass filter operating at 21.98 GHz are a better bandwidth of 0.75 GHz than for a passive filter and a noise figure of 1.95 dB. Comparisons between simulation and measurements are reported.
Keywords :
Active filters; Active inductors; Band pass filters; Gallium arsenide; HDTV; MMICs; Microwave filters; Narrowband; Q factor; Resonator filters;
Conference_Titel :
Microwave Conference, 1998. 28th European
Conference_Location :
Amsterdam, Netherlands
DOI :
10.1109/EUMA.1998.338016
