2.4ghz 8dbi patch.. [Archive]

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logicwins

Oct 18, 2009, 10:23 PM

Tarro

Oct 18, 2009, 10:30 PM

The larger patch you are looking at is probably a 900mhz 8dbi patch antenna, take another look. I fly 900mhz and wish the patch antenna was the same size as the 2.4gig. I had 2.4gig when I started but could not fly at any of the fields because everyone was using 2.4gig for their RC link and it would kill my video.

David22

Oct 18, 2009, 11:37 PM

I get 2.4's from RV
don't worry about the physical size
just get the highest dbi for both your plane and patch to go the furthest.

My 1.2 patches are different shapes and sizes

Your local HAM or radio communications store sells all this stuff as well.
A high dbi yaggi does not cost very much
But like a shot gun you will have to aim it to where you will be flying hehehe

JMSTECH

Oct 19, 2009, 12:53 AM

Where are you guys getting your 8dbi patches from? I am thinking about the 4.5inx4.5in one from HobbyWireless.. could its small size be a problem or should I get one that is larger? Looking for the best reception possible obviously. :D
4.5X4.5 (8dB 2.4Ghz) is fine from Wilson at Hobbywireless, plus he is a trustworthy family man who cares about his customers.

It all depends on what you want really, like how far you intend to fly. If you plan to go with in line of sight then 8dB is cool (500mW 2.4Ghz video 3dB whip on plane...8db patch on the ground = 8KM) and like Tarro said... have it position relatively low to the ground for effectiveness (tilted 45 degree) because it uses the earth as a groundplane. This way you don't need to fuss with it during flight.
If you like to fly far then try 14dB but this is a narrow beam in the short distance but gets wider the further you are out like past the 1500 meter mark. I hardly move the 14 dB (placed 3 ft off the ground on a tripod) when I'm 1.5km and over. (You can also talk to Wilson at Hobbywireless for those).