Some Basic Principles of RF Electronic Systems and Antennas

  • Roger A. Dana


Basic principles that apply to all electronic systems and to antennas in particular include: (1) Only signal plus noise can be measured, not signal by itself; (2) signals add coherently whereas noise adds incoherently; (3) signal-to-noise ratio (SNR) gain at the receiver is only accomplished by voltage integration; (4) radio performance goes as one over the square-root of the SNR. The keys to understanding the SNR in a receiver are Friis’ Link Margin Equation and Friis’ formula for the noise factor. These relationships are explained because they should be well-understood by electronic systems engineers.


Electronically scanned array Fourier transform Conservation of energy Signal to noise ratio (SNR) Electromagnetic reciprocity Coherent integration Friis Link margin equation Noise figure Noise factor 

Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Roger A. Dana
    • 1
  1. 1.Advanced Technology Center of Rockwell CollinsCedar RapidsUSA

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