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22-90-01 Second Harmonic Filter
The ferrite used to make circulators is a non-linear material that generates a significant amount of 2nd harmonic power which can contribute to the formation of 3rd order intermodulation products when mixed with other transmitter carriers. For this reason, either a bandpass cavity filter or a harmonic filter must always be installed between the isolator and the antenna. TX RX manufactures single and dual-section filters for applications where bandpass cavities are not used.

  • Installed between isolators and antenna when bandpass cavities are not used
  • Single and dual-section models for 30 or 60 dB attenuation.





Product Specifications 
Item No22-90-01
Item NameSecond Harmonic Filter