[TowerTalk] More from the M2 antennas quality control file

[Jim Lux]

On 4/13/15 5:37 AM, Patrick Greenlee wrote:
> I'm not a Yagi guru or an EZNEC modeler. Can someone tell me what 1/16
> of an inch in element length means in performance parameters in the
> example below?  I have done mostly wire antennas and 1/16 or 1/8 didn't
> seem to make much difference.
>

this is a 432 MHz antenna with a lot of elements where the elements are 
about a foot long overall.
1/16" if it's on both sides, is shortening the element by about 1%

The element lengths are critical to getting low side/back lobe 
performance, although it doesn't change forward gain very much.


As you note, on something like a dipole, a change of a few percent 
doesn't change the performance all that much.