Second Harmonic RF Filters
Second Harmonic Filters
Second Harmonic RF Filters
Bird Technologies - The RF Experts

Second Harmonic Filters

Second Harmonic Filters
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. Bird manufactures single and dual-section filters for applications where bandpass cavities are not used.
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  Item No Item Name
  22-38-01 Second Harmonic Filter
  22-67-01 Second Harmonic Filter
  22-90-01 Second Harmonic Filter