An Ultra-Wideband LNA with Notch Filter

Author

Weng, Ro-Min ; Kuo, Ron-Chi ; Lin, Po-Cheng

Author_Institution

Nat. Dong Hwa Univ., Hualien

fYear

2007

fDate

24-25 April 2007

Firstpage

1

Lastpage

4

Abstract

An ultra-wideband (UWB) common-gate low noise amplifier with notch filter is proposed. For extending the bandwidth, the UWB LNA uses the stagger tuning technique of two stages with different resonant frequencies. The notch filter with extremely high quality factor provides deep rejection ratio to eliminate the in-band interference. The circuit is simulated with TSMC 0.18 mum mixed signal/RF CMOS process technology with 1.8 V power supply. The input reflection coefficient S₁₁ and output reflection coefficient S₂₂ are both less than -10 dB. The flat power gain (S₂₁) is higher than 11 dB while the maximum rejection ratio is over 49 dB at 5.77 GHz. The minimum noise figure is 5 dB.

Keywords

CMOS integrated circuits; Q-factor; circuit tuning; low noise amplifiers; microwave amplifiers; mixed analogue-digital integrated circuits; notch filters; ultra wideband technology; UWB LNA; UWB common-gate low noise amplifier; deep rejection ratio; in-band interference; input reflection coefficient; mixed signal/RF CMOS process technology; notch filter; output reflection coefficient; quality factor; size 0.18 mum; stagger tuning technique; ultra-wideband LNA; ultra-wideband common-gate low noise amplifier; voltage 1.8 V; Bandwidth; Circuit noise; Circuit optimization; Filters; Low-noise amplifiers; Q factor; Reflection; Resonant frequency; Tuning; Ultra wideband technology; Ultra-wideband; filter; low noise amplifier; notch;

fLanguage

English

Publisher

ieee

Conference_Titel

Radioelektronika, 2007. 17th International Conference

Conference_Location

Brno

Print_ISBN

1-4244-0821-0

Electronic_ISBN

1-4244-0822-9

Type

conf

DOI

10.1109/RADIOELEK.2007.371431

Filename

4234180