[TowerTalk] Effect of element shape was: Re: InnovAntennas contact info

[David Gilbert]

The Moxon may not be a "special" case, but it is indeed different. The 
Moxon is actually a form of phased array ... the tips of the elements 
are bent toward each other to provide capacitive coupling between them.  
Think of why you never see a three element Moxon.

Apples and pears ...

73,
Dave   AB7E




On 3/20/2013 5:46 AM, Pete Smith N4ZR wrote:
> But given current distribution on a dipole, isn't it generally 
> understood that drooping ends have relatively little effect?  I guess 
> the Moxon is a special case, where the ends are brought close to each 
> other.
>
> 73, Pete N4ZR
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> On 3/20/2013 7:27 AM, David Robbins wrote:
>> yes, in a classic yagi with straight and parallel elements that is 
>> true... but when you bend or make the driven element not a simple 
>> half wave dipole then it can have an effect on the pattern by itself.
>>
>> Mar 20, 2013 01:18:45 AM, jim at audiosystemsgroup.com 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?
>>
>> 73, Jim K9YC
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