Title :
Out-band interference rejection in UWB LNA receiver using coupled inductors in 3.1–10.6 GHz
Author :
Abiri, Ebrahim ; Salehi, Mohammad Reza ; Rezaei, Hossein ; Arab, Soodeh
Author_Institution :
Dept. of Electr. & Electron. Eng., Shiraz Univ. of Technol., Shiraz, Iran
Abstract :
In this paper, a UWB LNA circuit with a new input stage is proposed. In this scheme, a combination of coupled inductors in the input stage is utilized. The input stage is able to easily reject out-band interference with 29.6 dB. This input stage is applied in an LNA with 0.18 μm technology. The LNA has a peak gain of 24 dB in 3.1-10.6 GHz frequency band while showing a minimum noise figure of 1.44 dB in the mentioned frequency band. Power consumption of the UWB LNA core is 14.1 mW DC which is supplied from a 1.8 V power supply. S11 is less than -10.3 dB over the entire bandwidth since the best value of IIP3 over the entire bandwidth is -13 dBm which occurs at the frequency of 6GHz.
Keywords :
inductors; interference suppression; low noise amplifiers; radio receivers; radiofrequency interference; ultra wideband communication; UWB LNA circuit; UWB LNA receiver; coupled inductors; frequency 3.1 GHz to 10.6 GHz; gain 24 dB; gain 29.6 dB; input stage; minimum noise figure; out-band interference rejection; peak gain; power 14.1 mW; power consumption; size 0.18 mum; voltage 1.8 V; Bandwidth; Equations; Gain; Inductors; Interference; Noise; Noise figure; Out-band interference; coupled inductors; image rejection; low noise amplifier (LNA); noise figure; ultra wide band (UWB);
Conference_Titel :
Electrical Engineering (ICEE), 2011 19th Iranian Conference on
Conference_Location :
Tehran
Print_ISBN :
978-1-4577-0730-8
