Balanced Intermodulation Reference With Flat Frequency Response Using Nonlinearity Equalization

Qianwen Chen, Xiong Chen, David J. Pommerenke, Ming Yu

Research output: Contribution to journalArticlepeer-review


This letter proposes a balanced intermodulation (IM) reference source with constant IM magnitude-frequency response using the nonlinearity equalization method. In the design, the diode is working as the nonlinear source, while the excitation carriers are equalized versus frequency to stimulate diode; thus, a flat IM3 magnitude-frequency response can be obtained accordingly. The experiment demonstrates this designed IM source can provide flat IM3 magnitude-frequency response at 700 MHz, 1800 MHz, and 2600 MHz IM3 test bands with a fluctuation error less than 1.5 dB, while three typical reference magnitudes ranges from −80 dBm, −90 dBm to −100 dBm at 2 × 43 dBm are demonstrated also.
Original languageEnglish
Article number9062495
Pages (from-to)2634-2637
Number of pages4
JournalIEEE Transactions on Electromagnetic Compatibility
Issue number6
Publication statusPublished - Dec 2020


  • Balanced intermodulation (IM)
  • IM equalization
  • flat IM response

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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