Topband: Shared Apex Loop Array

[Andy Ikin]

Bruce,

I have considerable experience with loop arrays; whilst they are good 
performers in an electrically noisy environment, they suffer from poor 
directivity at higher angles. This can also be seen with EZNEC models by 
looking at the AZ Plot with an Elevation angle of  say 40 degrees.
The directivity and RDF is much better with a pair Phased Flags for example.

Other issues, Tom has mentioned a too close element spacing which will lower 
the array gain. Also there is the issue of array stability i.e. a minor 
phase or amplitude error will completely screw up the pattern.

73

Andrew  G8LUG