IEICE Electronics Express
Online ISSN : 1349-2543
ISSN-L : 1349-2543
LETTER
A high image rejection SiGe low noise amplifier using passive notch filter
Kai JingYiqi ZhuangHuaxi Gu
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Keywords: LNA, notch filter, SiGe, IRR
JOURNALS FREE ACCESS

2014 Volume 11 Issue 3 Pages 20130928

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Abstract

A new design is presented that combines a low-noise amplifier (LNA) with a new passive base-collector notch filter based on Jazz 0.18μm SiGe technology. Extra capacitor is introduced in notch filter, eliminating the operating-frequency input mismatch in formal base-collector notch filters. Results show that LNA obtains a 4dB S21 enhancement of 14.1dB and a 7dB increase S11 of −15dB at 20.5GHz, image rejection ratio is 33.5dB. IIP3 is 3.43dBm at the operating frequency for a power consumption of 18mW from a 3V power supply.

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© 2014 by The Institute of Electronics, Information and Communication Engineers
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