Maximum Achievable Gain of a Two Port Network

Ali Niknejad and Siva Thyagarajan

EECS Department
University of California, Berkeley
Technical Report No. UCB/EECS-2016-15
April 8, 2016

http://www2.eecs.berkeley.edu/Pubs/TechRpts/2016/EECS-2016-15.pdf

The maximum gain of amplifiers at high operating frequencies (millimeter-wave and terahertz) is severely limited by the cut-off frequency of the transistors. Given the two port parameters at the desired frequency, the maximum stable gain achievable by the device is fixed. However, by adding an external lossless passive network, the composite two port parameters of the circuit can be modified. Under these conditions, it is possible to achieve a much higher gain for the device if the two port parameters are chosen wisely. This report derives the maximum achievable gain of a two port network and discusses an embedding technique to achieve this desired gain.


BibTeX citation:

@techreport{Niknejad:EECS-2016-15,
    Author = {Niknejad, Ali and Thyagarajan, Siva},
    Title = {Maximum Achievable Gain of a Two Port Network},
    Institution = {EECS Department, University of California, Berkeley},
    Year = {2016},
    Month = {Apr},
    URL = {http://www2.eecs.berkeley.edu/Pubs/TechRpts/2016/EECS-2016-15.html},
    Number = {UCB/EECS-2016-15},
    Abstract = {The maximum gain of amplifiers at high operating frequencies (millimeter-wave and terahertz) is severely limited by the cut-off frequency of the transistors. Given the two port parameters at the desired frequency, the maximum stable gain achievable by the device is fixed. However, by adding an external lossless passive network, the composite two port parameters of the circuit can be modified. Under these conditions, it is possible to achieve a much higher gain for the device if the two port parameters are chosen wisely. This report derives the maximum achievable gain of a two port network and discusses an embedding technique to achieve this desired gain.}
}

EndNote citation:

%0 Report
%A Niknejad, Ali
%A Thyagarajan, Siva
%T Maximum Achievable Gain of a Two Port Network
%I EECS Department, University of California, Berkeley
%D 2016
%8 April 8
%@ UCB/EECS-2016-15
%U http://www2.eecs.berkeley.edu/Pubs/TechRpts/2016/EECS-2016-15.html
%F Niknejad:EECS-2016-15