70 MHz To 26.5 GHz

Circulators

           A circulator is a ferrite device (ferrite is a class of materials with strange magnetic properties) with usually three ports. The beautiful thing about circulators is that they are non-reciprocal. That is, energy into port 1 predominantly exits port 2, energy into port 2 exits port 3, and energy into port 3 exits port 1. In a reciprocal device the same fraction of energy that flows from port 1 to port 2 would occur to energy flowing the opposite direction, from port 2 to port 1.

           Single junction (3port) is standard. Specifications provided in catalog are for standard 3 port devices. All standard models can be built as double junction devices on special order. The selection of ports is arbitrary, and circulators can be made to "circulate" either clockwise (CW) or counterclockwise (CCW).

           A circulator is sometimes called a "duplexer", meaning that is duplexes two signals into one channel (e.g. transmit and receive into an antenna). This is not to be confused with the term "diplexer" which is refers to a filter arrangement where two frequency bands are separated into two channels from a single three-terminal device. A lot of people mix up these terms. You can remember the correct definitions because "filter" and "diplexer" both have an "i" in them, and "circulator" and "duplexer" both have a "u".

Isolators

          By terminating one port, a circulator becomes an isolator, which has the property that energy flows on one direction only. This is an extremely useful device for "isolating" components in a chain, so that bad VSWRs don't contribute to gain ripple.

          Isolator and circulator are sensitive to magnetic field. Do not expose the unit to magnetic field. Do not expose the unit to strong magnetic feild or permaneant degraded electrical performances may occur. Installation of unit in proximity to magnetic materials may cause degraded elctrical performances.

More Information

                                                                   COAXIAL   AND  DROP-IN

                                                                         70 MHz To 26.5 GHz

Drop-in

           Drop-in (tab or sureface mount terminal)  was isolator or circulator. Aerocomm's drop-in must be installed so that bottom surface of housing lies flat with circuit ground and connecting tabs lie flat with microstrip circuit. The tabs must be aligned properly on the mating 50 Ohms microstrip circuit.

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                                                         Catalog 2009