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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.


5.8GHz SpiroNet Patch Antenna, +13dBi RHCP

Terry
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Terry

Terry 5

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Not that I'm going to start building or flying anything just now but my mind was free wheeling to what was going to be my next auto tracker. Just out of interest has anyone done any field testing of the SpiroNet 5.8Ghz RHCP Patches? Are they good at rejecting linear signals? What is the real world increase in range compared to an omni?

 

Thanks, Terry

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Mr.RC-Cam

Mr.RC-Cam 129

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No practical field testing to share on the IRC +13dB CP Patch regarding its ability to reject LP. Keep in mind that rejection of LP signals received on a CP antenna is about -3dB or less (on a good CP antenna design).

Compared to a typical Skew Planar Wheel ("Cloverleaf") type omni CP, the +13dBI patch will give much more range. I estimate at least 3X.

My RF field strength testing shows that it has +4dB more gain than the economy CP patch you previously used (dpcav 5.8GHz CP patch). But it has about half the beamwidth.

 

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Terry

Terry 5

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Thanks for that. I dont know why I had forgotten it was a 3db loss considering I built and used a helical back in the 2.4Ghz days. I may buy one (or two) to test as CP seems the norm these days. I did dust off my old Twinstar biplane the other day and it seems to have got me thinking....

 

Terry

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