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Ultra-wideband low noise amplifier using a cascode feedback topology

✍ Scribed by Jihak Jung; Taeyeoul Yun; Jaehoon Choi

Publisher
John Wiley and Sons
Year
2006
Tongue
English
Weight
105 KB
Volume
48
Category
Article
ISSN
0895-2477

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✦ Synopsis

Abstract

An ultra‐wideband (UWB) low‐noise amplifier (LNA) that consists of two cascode and shunt feedback stages is presented. The measurement results show the maximum gain (S~21~) of 11.9 dB with the 3‐dB band from 2 to 6.5 GHz and return losses (S~11~, S~22~) of less than −7.8 dB from 2 to 11 GHz. In addition, the fabricated LNA achieves the average noise figure (NF) of 4.5 dB from 2 to 10 GHz, which value is much lower than previously reported state‐of‐the‐art UWB amplifiers. The input‐referred 3^rd^‐order intercept point (IIP~3~) and the input‐referred 1‐dB compression point (P~1dB~) of the LNA are achieved as 4 and −5 dBm, respectively, while consuming 27 mW in the 0.18‐μm RF CMOS process. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 1102–1104, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21611

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