The maximum bandwidth of an RF filter or duplexer for a terminal at this frequency range is today around 30-35 MHz.
22.
This eliminates the need for a duplexer at the mobile end, since time-division duplexing of RF section usage can be performed.
23.
Wilhelm Stepp, an engineer on the research staff, designed a transmit-receive device ( a duplexer ) for allowing a common antenna.
24.
Duplexer technology affects choice of duplex separation and centre band gap which have been designed for the APT band plan with these considerations in mind.
25.
In 2002, the 8150 was discontinued and was replaced by the 9000 series, which produced 50 pages per minute and used an internal duplexer.
26.
The branch-duplexer often includes a gas-filled tube that has high attenuation for high power microwaves but no attenuation for low power microwaves.
27.
There are two legs to the duplexer filter, one is tuned to pass the input frequency, the other is tuned to pass the output frequency.
28.
By locating the Sutton tube at the right location along the waveguide to the receiver, the same effect as the branch-duplexer could be arranged.
29.
With the inclusion of two-duplexer system in the devices and network equipment, full interoperability is guaranteed across the entire band of the APT band plan.
30.
200pxIn same-band repeaters, isolation between transmitter and receiver can be created by using a single antenna and a device called a " duplexer ".
