Topband: beverage lobes

[Tom Rauch]

> Staggered Beverages narrow the horizontal lobe, to get low 
> vertical lobes you need to go long beverages or long and 
> stagerred, and down hill if possible.

Not so. Staggered Beverages can place a null almost anywhere 
depending on stagger distance and phase.  With 180 degree 
phase shift you can get a null straight up (and to the 
sides). Generally the stagger works best to control or 
improve F/B ratio or suppress high angle lobes. It actually 
doesn't do as much at all for lobe width.

The high angle lobe generally doesn't contribute much noise. 
S/N is largely a function of directivity, and that is not 
impacted much by a few narrow spurious lobes.

For Beverages in Echelon (stepped):

http://www.w8ji.com/echelon-log_beverages.htm

73 Tom