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High‐gain sub‐decibel noise figure low noise amplifier for atmospheric radar
Author(s) -
Venkatesh Murthy B. T.,
Srinivasa Rao I.
Publication year - 2016
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.29873
Subject(s) - noise figure , low noise amplifier , effective input noise temperature , noise figure meter , y factor , electrical engineering , amplifier , electronic engineering , return loss , engineering , noise temperature , transistor , radar , high electron mobility transistor , noise (video) , common source , linearity , physics , computer science , telecommunications , rf power amplifier , cmos , phase noise , voltage , artificial intelligence , antenna (radio) , image (mathematics)
This article presents the design of a compact and low ‐ cost single ‐ stage narrow band low ‐ noise amplifier (LNA) for atmospheric radar application. Active feedback technique is employed to improve linearity without affecting the noise figure and gain. The source ‐ degenerated inductor topology is used along with the cascaded transistors to achieve stability with maximum gain and minimum noise figure simultaneously. High ‐ pass input and output matching circuits are used to improve input and output return losses. The amplifier was implemented on a low ‐ loss substrate RT/duroid with pseudomorphic high electron mobility transistor (pHEMT) technology at 1.3 GHz. The measured results of LNA exhibit a gain of 28 dB and noise figure of 0.39 dB. The input and output return losses are <10.8 dB and third ‐ order input intercept point is 33 dBm. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:1618–1622, 2016
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