Okay antenna gurus, I can use some help here please...

I'm using a 5.8Ghz video transmitter/receiver system on a robot (2D=20
driving, indoor).  These systems are popular with the drone-racing=20
crowd, but most of the good antennas are either circular-polarized (so=20
they are uniformly effective at most angles) or patch antennas which are=20
apparently very unidirectional.  Linear antennas have mostly gone away=20
for this purpose.

I'm trying to maximize signal strength/reception so the operator can be=20
in a different room and on a different floor.  For my purposes, I'm=20
thinking a linear antenna on the transmitter side (robot) may be best=20
though, as I can mount it vertically in the robot body, and perhaps use=20
a patch antenna on the receiver side as that would have minimal=20
movement.  Or linear as well for the receiver.  I understand that whip=20
antennas are really crappy so would a straight piece of wire work=20
better?  I also discovered "collinear antennas" while searching.

I have about 18-20" of room to put an antenna vertically inside the=20
robot ... would having an antenna length of a multiple of the wavelength=20
work better than just a single-wavelength antenna?

So what say ye?

Cheers,
-Neil.


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