Compact Wideband LNA With Gain and Input Matching Bandwidth Extensions by Transformer

This letter presents a compact wideband low-noise amplifier (LNA) with utilizing the transformers for gain and input matching bandwidth extensions based on the source degeneration topology. The wideband gain response is achieved by using a transformer gate-drain feedback technique to peak the gain a...

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Bibliographic Details
Published inIEEE microwave and wireless components letters Vol. 27; no. 7; pp. 657 - 659
Main Authors Qin, Pei, Xue, Quan
Format Journal Article
LanguageEnglish
Published IEEE 01.07.2017
Subjects
Compact
Gain
gate–drain feedback
Impedance matching
Logic gates
low-noise amplifier (LNA)
Noise measurement
Semiconductor device measurement
transformer
Wideband
wideband gain response
wideband input matching
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Summary:This letter presents a compact wideband low-noise amplifier (LNA) with utilizing the transformers for gain and input matching bandwidth extensions based on the source degeneration topology. The wideband gain response is achieved by using a transformer gate-drain feedback technique to peak the gain at high frequency while the wideband input matching is obtained by employing a new transformer-based input matching network to produce two resonant points separately located at low and high frequencies within the operating band. Implemented in 65-nm CMOS process, the proposed LNA shows a measured peak gain of 10.2 dB with its 3-dB bandwidth ranging from 15.8 to 30.3 GHz and minimum noise figure of 3.3 dB. Taking advantage of the superior compactness from the transformer-based techniques, the LNA occupies very compact chip area of only 0.18 mm 2 , exhibiting as one of the most compact wideband LNAs.
ISSN:1531-1309
1558-1764
DOI:10.1109/LMWC.2017.2711524