I think I've read of similar application in microwave multi-hops, where very high isolations can be achieved between back-to-back antennas.
----- Original Message ----- From: Burt Lang To: [email protected] Sent: Wednesday, March 25, 2009 12:25 PM Subject: [Repeater-Builder] Re: simplex repeater Somewhere in my pile of data books I have an application note that refers to a "simplex repeater" being used in commercial applications. The booklet was from either dB Products or Pye as I recall. The purpose of their "simplex repeater" was to fill local coverage holes. The equipment described consisted of 2 beam antennas, one pointed at the source and the other pointed at the hole with an amplifier and filter between them. The antennas were adjusted for maximum isolation and the amplifier gain was set to be considerably less than the isolation between the antennas. Similar setups were used in the early days of television to give coverage in behind mountains. These setups would simultaneously transmit on the same frequency. Has anyone else seen such application notes or booklets??? Burt VE2BMQ
