Design Considerations For A Bandwidth Efficient Split-band Trunk Station (1983)
By Joseph P. Preschutti, C-COR Electronics, Inc.
Technical considerations for the design of a bandwidth efficient split-band trunk amplifier are discussed with some highlights on the choice of diplex filters and their effect on the performance of the amplifier. A comparison is given between guardband requirements for a standard 30/50 MHz sub-split amplifier and those for a 186/222 MHz split-band amplifier. Some practical considerations are outlined concerning the structure of the reverse amplifier module, and how the closed loop pilot controlled PIN Diode attenuator plays a major role in maintaining reverse system flatness. System performance specifications and test data are presented for a split-band gear with a reverse bandwidth of 5-186 MHz and forward bandwidth of 222-450 MHz.
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