Title :
A Multistandard RF Front-End Using Varactor Controlled Tunable Interstage Matching Network
Author :
Shin, Soo-Hwan ; Yoo, Hyung-Joun
Author_Institution :
Sch. of Eng., Inf. & Commun. Univ., Daejeon
Abstract :
A multistandard RF front-end using a tunable interstage matching network is designed in 0.25 mum CMOS technology. It consists of a wideband LNA, interstage matching network, and a Gilbert-cell mixer. Tunability of the interstage matching can be obtained by a MOS varactor. It can change tuning frequency by controlling capacitance of varactor. Gain can be flattened over whole target band by the proposed interstage matching. Designed RF front-end has homogeneous performance from 1.8 to 2.4 GHz. It can be used for 3G wireless communications, mobile internet, and WLAN applications such as IEEE 802.11b/g
Keywords :
CMOS analogue integrated circuits; MOS capacitors; UHF integrated circuits; low noise amplifiers; varactors; 0.25 mum; 1.8 to 2.4 GHz; 3G wireless communications; CMOS technology; Gilbert-cell mixer; IEEE 802.11b/g; MOS varactor; WLAN; capacitance control; interstage matching network; mobile internet; multistandard RF front-end; varactor controlled tunable interstage matching network; wideband LNA; CMOS technology; Capacitance; Communication system control; Internet; Radio frequency; Tuning; Varactors; Wideband; Wireless LAN; Wireless communication; Multistandard; gain; interstage matching; tunable; varactor;
Conference_Titel :
Radio and Wireless Symposium, 2007 IEEE
Conference_Location :
Long Beach, CA
Print_ISBN :
1-4244-0445-2
Electronic_ISBN :
1-4244-0445-2
DOI :
10.1109/RWS.2007.351797
