Whether you’re a ham, MW or SW DXer, there are times when a receive antenna will be very handy. I’ve experimented with EWEs, K9AYs and coax loops. Just recently, Shared Apex Loop Arrays have received a lot of publicity and this excellent Youtube presentation certainly caught my interest.
Here is a good PDF article from the designer, Mark Baumann.
And now Array Solutions are selling them.
Very compact and as for performance, I’ll let the Youtube video provide the answer.