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

[W1YW at aol.com]

Yeh, you can get better gain, bandwidth AND lower sidelobes. See  
'Optimization of Wire Antennas', Landstorfer and Sacher, Wiley Interscience,  1985.
 
The Innova designs use end-bends to shrink the projected size of the  
element. The ends do very little to the radiation pattern in the far field on  
those size scales.
 
Moxon's are nothing more than 2 element Yagis with end bends. There is  
virtually no coupling at the voltage max's for the driven and parisitic==so the 
 ends can be placed fairly close together. Same with spider beams, hex 
beams,  yadayada.
 
The Innova design looks like a nice offering for the ham market. The  
multiband coupling is also well known: Gary Breed (who publishes Hi Frequency)  
has a patent on that.
 
73,
Chip W1YW
--------------------------------
 
 
In a message dated 3/20/2013 8:48:46 A.M. Eastern Daylight Time,  
n4zr at contesting.com writes:

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.
>