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Attention: RC-CAM.com will be closing down August 2021.

The RC-Cam.com forum was the very first online community dedicated to the advancement of wireless video cameras on radio controlled (R/C) models. This is now called "FPV" (First Person View). We are proud of the contributions that our members have made to the FPV hobby.

We've seen significant changes over the last twenty years. Initially there were a lot of eager R/C hobbyist that built their own video systems. Allowing these creative individuals to share their work was the purpose of this site. Now the FPV market is flooded with low cost systems; Sadly DiY FPV video projects are now rarely discussed.

RC-CAM.com (main site and forum) will be closing down August 2021. This is being announced now (March 2021) so that everyone has time to download any information that is important to them. After the site is shutdown the information will no longer be available here.

We appreciate every member's involvement with advancing the FPV hobby. It is indeed sad to say goodbye to all our online friends. Be safe and stay healthy.



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The best reported results with a ½ wave monopole antenna have been using a vertical antenna with a 45 degree downward facing counterpoise. My application won't allow this and the counterpoise needs to be at 90 degrees to the antenna which will be mounted vertically. My question is from an engineering standpoint does the counterpoise need to be straight and do other electronics/wires near it have any affect on the antenna performance or is this just a try it to find out situation?

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The position of any counterpoise, ground, or nearby object, affects the antenna's beam pattern and resonance. The best way to see the effects is to use a software based antenna design application and play what-if's with it.

A 1/2 wave monopole is also called a End Fed Dipole and End Fed Half Wave. I think that if you Google those terms you will see that a half wave monopole may not be the ideal choice unless you add a impedance matching network to it. Yes, I know, many wireless video systems include a half-wave monopole whip, but these are provided because of their very low cost (with little regard to performance).

BTW, if you don't do anything to address the high impedance of the monopole then I don't expect that the position of the ground plane will have a huge effect on overall performance. So, the position you choose may not matter much. Just try it out and see how it goes.

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