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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 was announced several months ago (March 2021) to allow our members ample 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.



Hyperlink patch question


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I took apart one of the popular Hyperlink 2.4, 8dbi patch antennas to see if the elements (without the case) would

fit into my own project enclosure, and to also swap the coax pigtail to a direct pcb SMA connection.

I noticed that the driven element is dead shorted (intentionally) to the ground plane via a single

trace that connects to a plated thru hole on the metalized pcb ground plane. These are air dielectric

designs, very similar to the RC-Cam project "GP Patch", except with a larger spacing between elements.

How can it work with the elements shorted together?

Thanks,

Tom

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Yes, DC is intuitive, RF is whacky.

Anyway, the antenna works great.

Here's a look at what's inside the box.....

The top view shows the basic configuration. The ground plane consists of a pcb that is fully

plated on the bottom side.

post-564-12495172451_thumb.jpg

The bottom is self explanatory. This board measures 3" square. A plastic post passes through the large

center hole, which also captures the driven element and holds it fixed.

post-564-124951724572_thumb.jpg

The element spacing is approx. 15mm, or 1/8th wave at 2.44 (I think that's right?)

post-564-124951724631_thumb.jpg

This view shows the grounding trace that connects to "ground" via a plated thru hole.

post-564-124951724352_thumb.jpg

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