Title :
Ultra-Wideband Front-End With Tunable Notch Filter
Author :
Townsend, Kenneth A. ; Belostotski, Leonid ; Haslett, James W. ; Nielsen, John
Author_Institution :
Schulich Sch. of Eng., Calgary Univ., Alta.
Abstract :
This paper presents the design of an LNA with integrated tunable notch filter targeted for UWB receivers. Impulse-based UWB systems suffer from an increased BER in the presence of strong interferers due to reduced SNR. The first stage of the LNA achieves a wideband input match while the second stage employs an integrated bridged-T filter for interferer cancellation. The LNA has been implemented in a standard 0.18mum CMOS process. Simulated results show the notch filter is tunable from 3.5GHz to 7.0GHz with greater than 40dB of rejection. For a notch frequency of 5.3GHz, the noise figure and gain at 3.5GHz are 4.1dB and 12.1dB respectively
Keywords :
CMOS integrated circuits; error statistics; interference suppression; low noise amplifiers; microwave amplifiers; microwave filters; microwave receivers; notch filters; ultra wideband communication; 0.18 micron; 12.1 dB; 3.5 to 7.0 GHz; 4.1 dB; BER; CMOS process; LNA; UWB receivers; bridged-T filter; impulse-based UWB systems; interferer cancellation; tunable notch filter; ultra wideband front-end; CMOS process; Capacitors; Feedback; Filters; Impedance matching; Inductors; Noise figure; OFDM; Tunable circuits and devices; Ultra wideband technology;
Conference_Titel :
Circuits and Systems, 2006 IEEE North-East Workshop on
Conference_Location :
Gatineau, Que.
Print_ISBN :
1-4244-0416-9
Electronic_ISBN :
1-4244-0417-7
DOI :
10.1109/NEWCAS.2006.250965
