[TowerTalk] InnovAntennas contact info

[Jim Lux]

On 3/19/13 10:18 PM, Jim Brown wrote:
> On 3/19/2013 11:10 AM, Joe Subich, W4TV wrote:
>>
>> They give the designer additional degrees of freedom with which to
>> control input impedance and side lobe structure.
>
> I was with you until you said "side lobe structure." I don't claim to
> know much a bout the design of Yagis, but I'm under the impression that
> pattern is largely determined by the tuning and spacing of parasitic
> elements. Am I wrong?
>

but with droopy ends (or hats or other stuff) it gives you more 
variables to try and adjust the relative element currents (mag and 
phase) and that does affect side/back lobes.  forward gain is mostly 
determined by overall length.  Number and spacing of elements affects 
side/back lobe structure. (to a first order)