Crosshair - 10 dbic Circularly polarized antenna tutorial!

[MASHTON1138]

I was wondering how that would work. I found Kondor's idea intriguing as it sounds like it could be very compact. But my first thought was that null and if it could be compensated for. Hmmmm? I would like to see this one attempted it might be pretty cool.

[Kondor-FPV]

The null gets smaller and smaller as the pitch angle of the leafs decreases... gonna have to test with as low as 10-15° pitch angle, but this thread is about the crosshair...

[IBCrazy]

Yes, please start a new thread. The antenna you are describing was one that I was researching (called the wheel antenna) when I started playing with the angles and the cloverleaf was born. And yes, I was NOT trying to invent a new antenna, it just happened

-Alex

[Wayno]

Being as the crosshair is CP I'm good to mount it any way up right? Just checking as I have one from RMRC along with their Ez antenna tracker pan/tilt and it would fit best if the coax came out from the side.

[Wayno]

And the forgotten image...

[IBCrazy]

^That's how it was designed to work

-Alex

[Wayno]

^That's how it was designed to work

-Alex

Thanks, for some reason I was thinking the 'bottom' is the side that the coax comes out of.

[Joe90]

To Ibcrazy

My friends find it so good the they convinced me into building one with their help :-)

I am running 910MHz and we will use the small reflector = 8.5db
I would like to know what will be the beam width ?
even better would be a radiaton plot. but I know it takes some times to do it.

thanks

[IBCrazy]

^Beamwidth is ~120 degrees to the 1db point. In other words the signal will be as strong or stronger than a SPW antenna within a 120 degree beam.

-Alex

[HugeOne]

even better would be a radiaton plot. but I know it takes some times to do it.

Voila Michel: