Scott, N0EDV wrote:
"Here it is---."

The 1/2-wave circumference halo at the top, is fed at points A-A and
uses a typical gamma match.

The one-wavelength loop doesn`t use a gamma match. It is in effect a
quad loop antenna. It really shouldn`t need much impedance adjustment to
match 50 or 70 ohms. In free-space, a full-wave loop has a feedpoint
impedance of near 45 ohms. That may not have satisfied the designers. I
don`t know the impedance of the 0.2 wavelength stub shown as a
connection at points A-A for the feedline. With the line spacing shown,
it probably has an intermediate impedance between that of the loop and
the intended feedline. No gamma match and shorting bar are involved.

The one-wavelength loop is not really omnidirectional. It has a 1-dB
gain perpendicular to the plane of the loop in free-space.

Best Regards, Richard Harrison, KB5WZI