> Now, from a perspective of impedance matching, wouldn't it
> make sense to
> use a circulator at the input of the reciever so that it is
> also matched
> to 50-ohms?
At first glance it might seem like a good idea, until you consider that
circulators aren't linear devices; they can produce mix products and
harmonics within. At low receive signal levels this isn't a problem because
the IM products are substantially lower in amplitude than the fundamentals,
but in the presence of one or more strong signals, it could be an issue...
--- Jeff
