The obvious answer would be the amount of
energy coupled to the two-loop bp cavity
output port should be minimal at the second
harmonic.
A lot of people assume the isolator/circulator
is an automatic serious level 2nd Harmonic
generator. I've not found that to be the case.
Places to be carefull: When using notch-pass
duplexing and some of the newer style combiners
where notching is the dominant portion of the
system and preselection and/or bandpass filters
are/is less applied.
****
I have three different brand Trunking Combiners
side by side: Telewave (qty of 2), Cellwave (qty
of 2) & Wacom (qty of 1). All are unmodified
original as-built combiner units.
Not a low pass filter in the bunch plus they
are all full duplex combiners (receive and
transmit on the same antenna). Same with both
the original Microwave Associates and Antenna
Specialist units in the next room.
So the answer in my mind is yes I would trust
a trailing passband cavity (properly configured)
to do the job. So does/did the above named
companies*.
cheers
skipp
*rip wacom
> "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> wrote:
> I trust that if there is no Low-Pass filter
> at the isolator output, a passband cavity
> would do the job?
> LJ
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