OMNI ANTENNA

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sathishTPED

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Hi all,
I am currently working on a project where i have to transfer video signals to a distance of 10km. i want to know that can i use a omni antenna on one side and a directional antenna on the other side. reason for using omni antenna is that side is a rotating fixture .so we need 360 degree coverage. i want to know whether this will work and also if there is any omni antenna which can transfer video signals you can share the datasheet\part no.


THANK YOU.
 

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There are many things that affect a point-to-point wireless communication: frequency, TX power/RX sensitivity, type of modulation, height of (both) antennas and cable losses, line-of-sight propagation (especially Fresnel zone), and last but not least, the antenna types and their polarization.
10km may not look as a very long distance for a wireless system, but if some (or all) of the things mentioned above are not carefully chosen, the quality of the communication may not be as expected.
 

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You didn't specify a frequency and modulation. Are we talking about analog TV in VHF/UHF or a proprietary, e.g. digital modulation using any available frequency?

A vertical dipole (in combination with vertical polarized receiver antenna) can basically transmit VHF/UHF TV omnidirectionally. But I strongly doubt that you'll find a legal band with a power level sufficient for 1 10 km range.
 
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