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Which amplifier has the highest input impedance? 

Electrical impedance
Input impedance
Low-noise amplifier
Amplifier
Power dividers and directional couplers

Answers from top 8 papers

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Papers (8)Insight
Proceedings Article•DOI
High Gain G-Band MMIC Amplifiers Based on Sub-50 nm Gate Length InP HEMT
P.H. Liu, W. Yoshida, J. Lee, L. Dang, J. Wang, W. Liu, J. Uyeda, D. Li, X.B. Mei, William R. Deal, Michael E. Barsky, Y.M. Kim, M. Lange, T.P. Chin, Vesna Radisic, Todd Gaier, A. Fung, R. Lai 
14 May 2007
8 Citations
To our knowledge, this is the highest amplifier gain per stage achieved at this frequency range.
Proceedings Article•DOI
A 90-GHz power amplifier with 18-dBm output power and 26 GHz 3-dB bandwidth in standard RF 65-nm CMOS technology
Zuo-Min Tsai, Yuan-Hung Hsiao, Hsin-Chiang Liao, Huei Wang 
02 Jun 2013
11 Citations
To the authors' knowledge, this power amplifier achieves the highest output power among the reported CMOS PAs at this frequency.
Open access•Journal Article•DOI
Impedance and Noise of Passive and Active Dry EEG Electrodes: A Review
Erwin H. T. Shad, Marta Molinas, Trond Ytterdal 
15 Dec 2020-IEEE Sensors Journal
68 Citations
This implies that their impedance plays a significant role in amplifier compatibility and affects total input-referred noise.
Journal Article•DOI
Design of Matching Networks for Low Noise Preamplifiers
Arne Reykowski, Steven M. Wright, Jay Porter 
01 Jun 1995-Magnetic Resonance in Medicine
133 Citations
This is in contrast to the familiar impedance match known from communication theory where input and source impedances have complex conjugate values for maximizing the power transfer from source to amplifier.
Proceedings Article•DOI
The reduction of third order intermodulation product in microwave amplifiers
M.R. Moazzam, C.S. Aitchison 
01 Jan 1996
13 Citations
This paper suggests that the third order intermodulation level in high frequency amplifiers can be reduced significantly by injecting the second harmonic of the input signal into the amplifier.
Open access•Journal Article•DOI
Wireless Josephson amplifier
Anirudh Narla, Katrina Sliwa, Michael Hatridge, Shyam Shankar, Luigi Frunzio, Robert Schoelkopf, Michel Devoret 
12 Jun 2014-Applied Physics Letters
25 Citations
The simpler impedance environment presented to the amplifier also results in increased amplifier tunability.
Open access•Journal Article•DOI
Evolutional design of small antennas for passive UHF-band RFID
Hidetoshi Makimura, Yuta Watanabe, Kota Watanabe, Hajime Igarashi 
09 May 2010
15 Citations
The optimization results in desirable input impedance for impedance matching and miniaturizing.
Journal Article•DOI
Input impedance of a powerful single-core ferromagnetic inductively coupled plasma source
Y. P. Bliokh, Yu. L. Brodsky, Kh. B. Chashka, Joshua Felsteiner, Ya. Z. Slutsker 
04 Jan 2010-Journal of Applied Physics
6 Citations
We have found values of parameters which determine the input impedance in such an “independent” regime and derived a quantitative theory which is in good agreement with the measured impedance values.

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