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The UPD028A from CTS Electronic Components is a RF Duplexer with Frequency 703 to 803 MHz, Band 1 758 to 803 MHz, Band 2 703 to 748 MHz, Power 1.5 to 15 W, Insertion Loss 3 dB. More details for UPD028A can be seen below.
782/751 MHz Ceramic Duplexer
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