"PDRUNEN" wrote in message
...
Hi Group,

I like the halo antenna for 6 meters in this months QST. Can anyone tell
me
what the input impedance would be if the halo was directly connected to
the
coax?

How about the same concept with the antenna as a square?

de KJ4UO

Shape has a very minor effect on the radiation resistance. Shortened 1/2
wave loops have a radiation resistance typically in the 10-12 Ohm region.
The halo has an elliptical ( about 3dB out of "omni") and care must be taken
to choke off radiation currents on the feedline and support mast.

Dale W4OP