Yes, you only need a directional antenna. There are a myriad of solutions
available.

First FM is a modulation method, not a set of frequencies.

What frequency are you interested in? A little more data would enable the
newsgroup members to help you.

--
-----------------------------------------------------------
Monday January 19th is Robert E. Lees Birthday.
http://gilbertnews.net
"me" wrote in message
...
I am interested to know if there is a way to transmitt FM radio
frequencies
in a directional path. I need to transmit from 1/8 to 1/4 mile in a very
direct narrow pattern. Does anyone know if this is possible.

me wrote:
I am interested to know if there is a way to transmitt FM radio frequencies
in a directional path. I need to transmit from 1/8 to 1/4 mile in a very
direct narrow pattern. Does anyone know if this is possible.

What frequency? Hams are allowed to use FM on most ham
bands from 29 MHz to hundreds of GHz.
--
73, Cecil http://www.qsl.net/w5dxp



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"Me" wrote:
"I am interested to know if there is a way to transmit FM radio
frequencies in a directtional path. I need to transmit from 1/8 to 1/4
mile in a very direct narrow pattern."

If these are 3-meter band (100 MHz) signals, a dish to confine these
frequencies directly to a small beamwidth (20-degrees) is impracticably
large (about 30 feet in diameter). Likewise, a Yagi to confine beamwidth
to about 20-degrees is about 20 meters (66 feet) long.

The best way to reach 1/8 to 1/4 mile with a narrow pattern may be with
a wire or cable of either electrical or optical type.

If 100 MHz is the information signal, it can be the modulation on a
carrier frequency in the microwave range which can be directionally
confined with reasonably sized antennas, or the signal can be modulated
by digital or analog methods on an optical laser or led circuit which
confines the beamwidth to a narrow beam.

Best regards, Richard Harrison, KB5WZI

Of course it's possible. It comes down to your application - what do you
want to do with it? Your application will dictate frequency, power
requirements, antenna syze/design, and even whether or not you really want
FM...

- KI6PR

"me" wrote
I am interested to know if there is a way to transmitt FM radio
frequencies
in a directional path. I need to transmit from 1/8 to 1/4 mile in a very
direct narrow pattern. Does anyone know if this is possible.

I am interested to know if there is a way to transmitt FM radio frequencies
in a directional path. I need to transmit from 1/8 to 1/4 mile in a very
direct narrow pattern. Does anyone know if this is possible.

me wrote:
Added: I am trying to transmit the entire fm broadcast bandwidth 88-108mhz.
very low power, very narrow pattern.

Is that legal?
--
73, Cecil http://www.qsl.net/w5dxp



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-----== Over 100,000 Newsgroups - 19 Different Servers! =-----

I should have added that the part about "very narrow pattern" implies "very
big antenna". Pattern is dependent on antenna size. The narrower the
pattern, the bigger antenna required to get the proper phase relationships
to form the pattern.
Steve

"Steve Nosko" wrote in message
...
Single frequency repeaters have been used, but the wide bandwidth here can
be a problem. In some situations two antennas is all that is needed -
probably not here, but inside a car, for example. The next step is just
two
antennas with amplification. I have used this in a conference room for
analog cellular - two tuplexers and two amplifiers for the Tx & Rx bands.

Using gain antennas back to back (high FB) and controlled gain in the
repeater, it has be done at VHF FM. If the destination can possibly hear
both the original and repeated signals, then it also needs to be
coherent -
that is:... receive - mix down, amplify, mix back up to freq.
The poster should provide more information on just what is desired.
There
are things called "community Repeaters" which have been used for towns in
a
valley to receive TV & FM broadcase.

--
Steve N, K,9;d, c. i My email has no u's.

Added: I am trying to transmit the entire fm broadcast bandwidth 88-108mhz.
very low power, very narrow pattern.

"me" wrote in message
...
I am interested to know if there is a way to transmitt FM radio
frequencies
in a directional path. I need to transmit from 1/8 to 1/4 mile in a very
direct narrow pattern. Does anyone know if this is possible.