Title :
A new investigation on low noise amplifiers for W-CDMA applications
Author :
Denidui, T. ; Ghanem, F. ; Hassaine, N.
Author_Institution :
Dept. of Math., Comput. & Eng., Quebec Univ., Rimouski, Que., Canada
Abstract :
A new approach on LNA design is presented. It consists in using simultaneously a series feedback and common source series feedback (CSSF). This is done by using a series resistance in the drain and a series inductance in the source of a PHEMT. Band-pass filters realized with 50 /spl Omega/ microstrip lines in the /spl Pi/ topology form were used to match both the input and the output. To examine the performance, the numerical results obtained with the approach are discussed and compared with two LNA´s configurations.
Keywords :
HEMT circuits; UHF amplifiers; band-pass filters; broadband networks; code division multiple access; electric resistance; feedback amplifiers; impedance matching; inductance; microstrip lines; /spl Pi/ topology; 2 GHz; 50 ohm; LNA design; PHEMT; UHF; W-CDMA applications; band-pass filters; common source series feedback; drain; input matching; low noise amplifiers; microstrip lines; output matching; performance; series feedback; series inductance; series resistance; source; Application software; Circuit stability; Feedback; Frequency; Impedance matching; Inductance; Low-noise amplifiers; Multiaccess communication; Noise figure; PHEMTs;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2000. IEEE
Conference_Location :
Salt Lake City, UT, USA
Print_ISBN :
0-7803-6369-8
DOI :
10.1109/APS.2000.874460
