Antenna Help

[BenMadrigal]

Can anyone give me a link and/or tell me how to use a 5.8ghz fpv clover leaf antenna and patch antenna together?

 

[finnen]

As long as they have the same polarity direction (right or left), you should be able to just connect it. The cloverleaf goes into the transmitter, and the patch in the receiver.

 

[Longbaorder23]

you should be aware of what exactly youre using though, and make sure that patch is circularly polarized, as well as in the right direction as mentioned. but if that patch is really high gain, be ready to have a tripod and make small adjustments while flying. if its lower gain, say 7dbi, theres less room for error, and the method for use is less strict.

 

[Craftydan]

you should be aware of what exactly youre using though, and make sure that patch is circularly polarized, as well as in the right direction as mentioned. but if that patch is really high gain, be ready to have a tripod and make small adjustments while flying. if its lower gain, say 7dbi, theres less room for error, and the method for use is less strict.

Are you sure that's not backwards?

Generally the higher the gain, the narrower the beam width -- the more closely you'll have to point the antenna at the airframe to get a signal into the receiver.


With high gain antennas, you need to be able to track the airframe as it moves around at longer ranges, so as it moves, the antenna needs to move *MORE*. with low gain antennas, as the airframe moves relative to you the less you need to move the antenna.

One of my buddies flies with a head-mounted diversity receiver, with one skew-planar and one high-gain helical, pointed forward. when he's flying close in and not facing the airframe, his skew-planar picks up the signal, and as the signal gets weak, he points his head at where the plane is and tracks it as he flies through the sky (in his goggles, he's flying wit the airframe, so it even helps him maintain orientation). He's mentioned he's played with it before -- looking off a bit as he gets out to range -- and has noted that he does notice the difference the high-gain provides . . . and that the beam is comfortably large enough that keeping track isn't that hard.

 

[Longbaorder23]

Ah! yes, my bad. there is MORE* room for error. Dont get that confused! lower gain, more room for error, less accuracy required. goodluck!

 

[William A]

Can anyone give me a link and/or tell me how to use a 5.8ghz fpv clover leaf antenna and patch antenna together?

3 lobe on the Tx, 4 lobe on the Rx.

Is that what you were asking ?