[Lowfer] Aerial Type Designation, help please.

[clive at ancient-mariner.co.uk]

I am trying to find the correct name for an aerial described thus:-

 

Four vertical support masts, A, B, C & D in rotation. With two wires - one
between A & C, the other between B & D. The two wires are joined where they
bisect each other. At this bisection joint, a vertical wire drops down to
the transmitter or tuning unit beneath.

 

Thus, a vertical monopole with a crossed top-hat, but is there a more
professional designation?

 

Similarly, if there were three masts, or indeed five?  In each case, assume
that the masts are of insulated construction.

 

Thanks.

 

Clive

GW4EYO