Duplexers allow you to use a single antenna for transmission or reception of two frequencies.
Duplexers are almost totally constructed of metal and are essentially the size of the chamber control of the resonant frequency.
As heat and cold atmospheric conditions could degrade the performance of the duplexer, great attention is paid to select the raw material used to product the duplexer. All manufacturers have their own formula. Experience and reputation should also be an important consideration in the selection of a duplexer.
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