Tranceiver -Single antenna

hi,

what is the best device to use same antenna for both transmitting and recieving?

Transmitter power is about 75Watts.
Frequency of operation: 435-440 MHz.
Connectors: N-type (F)



Regards
Chan-D-re

hi,

Is circulators protect the receiving section while transmitting?


we are using same antenna for both transmitting and receiving. is there any other device to make this possible?


Tranmit power:upto 100W
frequency of operation: 435- 440 MHz
Connectors: N-type (F)

Regards
Chandre

Use a relay, it's the simpliest way.

If your requirement is transmitting now and after you switch off TX you need to receive, (May be on the same or different frequencies) you may use a Relay for ease or a signal switcher with some diodes and capacitors.
In case you need to receive and transmit with the same antenna at the same time, on different frequencies, you may consider a Duplexer tunned to the required frequencies.
Cheers

If you are transmitting OR receiving, but not simultaneously, a PIN diode switch is probably the simplest solution.

If you are transmitting and receiving simultaneously on similar but not identical frequencies, use a diplexer.

If you are transmitting and receiving at the same time and on the same frequency, use a circulator.

Brian.

Circulator will not help and diplexers with custom design is the solution.