I find for the cam-op the Lawmate 1.3 is great, not perfect. I use a 900Mhz for my FPV. I use the standard dipole antennas that come with them. The that you have to think about is how the EM wave is propagating. The EM wave on a dipole antenna and how the wave travels to yours. This effects how your reception is when the AC is close versus far away. If the aircraft is high and close to you will get allot of signal loss as you enter the cone of silence if the antennas are vertical. If the AC has enough distance away from you, than the vertical antennas will work perfectly. However if you know most of your shots are going to be close with a steep vertical angle because of altitude to your receiver you want the antennas to be parallel to the ground because the wave will be propagating downward. As you move the craft away from you and start descending will get into the cone of silence again with horizontal antennas. It is exacerbated by lower frequencies because of the longer wavelength, the cone of silence is larger. However at longer distances the lower frequencies do not attenuate as much. The opposite is true with higher frequencies, there is always a give and take relationship. The MQ-1B predator uses a 5 ghz 15 Watt transmitter for the video down-link when flying line of sight (of the ground station antenna versus satcom), it even gets video blackouts. So there is no perfect solution out there all of the time.