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Old June 28th 06, 06:29 PM posted to rec.radio.amateur.antenna
J. Mc Laughlin
 
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Default low power FM TX and multiple antennas?

Dear MRW:
Do not do what you are proposing - assuming that I understand what you
are proposing.

It sounds as if you propose to connect in parallel, near the
transmitter, two transmission lines with each transmission line running to
one bay of a two bay antenna. You are not too clear about what you propose.

It is very difficult to have two transmission lines that are many
wavelengths long (as expected) that are so equal (including the termination
impedance) as to have the phases of the two signals at the antennas be equal
(as required by the normal two bay antenna). It is possible to maintain
close phase equality with short pieces of coax that are near the antennas.

Tell us more about what you wish to do. Mac


"MRW" wrote in message
ups.com...
Greetings.

If we are using one low power FM transmitter and we want to use a 2-bay
FM antenna configuration, will using a power splitter at the
transmitter output be sufficient?

The FM TX utilizes a type N connection to the FM antennas. .... So if I
split the power output and just have two outputs to handle each of the
two antennas, then that would work right?

What other considerations should I have in mind? Do I need to worry
about phasing issues?

Thanks!