The design of these duplexers provides a bandpass characteristic with minimum insertion loss, while also providing maximum TX to RX protection. Adjustable coupling optimizes the required attenuation for ideal RX performance. All cavity inputs are electrically shorted to ground for maximum static and noise protection.

RG-214 Mil-Spec cable is used for all interconnections to ensure long life, and lowest insertion loss with maximum power handling capability. Heavy-duty materials are used in construction of these duplexers, including silver-plated tuners and beryllium copper fingerstock contactors, assuring high “Q” performance with no problems due to dissimilar met als. Tuning is simple and remains stable from -30 C to +70 C, thanks to the threaded Invar rod. All duplexers are tuned and tested with customer-specified frequencies prior to shipping from the factory. No further adjustments should be required. The positive locking mechanism allows for simple field tuning if frequency changes are required.

The TPRD-4544/4744 duplexers mount on a 19” standard rack, with panel height of 5.25”. Power handling is 250 watts. Receiver desense protection is at least 90 dB, and TX sideband suppression is at least 75dB. With TX to RX spacing of 3 MHz or more, this duplexer can also combine two transmitters into one antenna, or feed two receivers. For spacing less then 3 MHz, please contact Telewave for assistance.
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