New Ferrite Isolators

Ferrite isolators are basically oneway transmission devices. An rf signal applied at one port of an isolator is attenuated very little in passing through the isolator to the second port, flow-ever, a signal applied at the second port of the isolator is substantially attenuated in passing through the isolator to the first port.

When an isolator is inserted between a signal source and a load, the energy from the source is transmitted to the load with very little loss, but, owing to the high attenuation in the reverse direction, the undesirable effects of changes in load conditions on the source amplitude and frequency are substantially reduced. The isolator thus offers the distinct advantage of low insertion loss over the ordinary attenuator pad. As a result higher system sensitivities (or levels) can be achieved for a given source power.

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