Simple calculation method of the intermodulation distortion of multiple‐carrier amplifiers operating in weakly nonlinear region

Noriharu Suematsu, Akio Iida, Tadashi Takagi, Shuji Urasaki

Research output: Contribution to journalArticlepeer-review

Abstract

Simple calculation method of the intermodulation distortion of multiple‐carrier amplifiers operating in weakly nonlinear region is presented. This method is based on the approximation that is effective when (1) the transfer characteristics of carriers are regarded as linear, and (2) the third‐order intermodulation distortion ratio versus the output power has 2 dB/dB slope. As the number of the carriers n→∞, the intermodulation distortion ratio approaches the value of 10 log10(3/2) + 6 = 7.76 dB higher than the third‐order intermodulation distortion ratio in the case of two‐carrier amplification at the same output power.

Original languageEnglish
Pages (from-to)44-51
Number of pages8
JournalElectronics and Communications in Japan (Part II: Electronics)
Volume78
Issue number10
DOIs
Publication statusPublished - 1995 Oct
Externally publishedYes

Keywords

  • Nonlinear amplifier
  • intermodulation distortion
  • microwave
  • mobile communication
  • multiple‐carrier amplifiers

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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