[Moon-net] Orthogonal polarization???

[Bill Dzurilla]

I read this on the M2 website about their 2MXP20
antenna:

"This antenna is remarkable in that the stacking gain
for four antennas can exceed 6 dB. Even using a single
Horizontal/Vertical relay, You have a moonbounce
package that can outperform larger, linear arrays.
Additional relay switching providing 4 different types
of discrete receiving polarizations: Horizontal,
Vertical, Right Orthogonal, and left Orthogonal bring
you near peak on all signals. Losses from spatial
polarity and Faraday rotation virtually disappear. EME
reliability approaches 100%."

I understand the part about the single relay to switch
from horizontal to vertical.  But I don't understand
how additional relays can produce orthogonal
polarization, as the antenna only has horizontal and
vertical elements.  Is it some sort of phasing?  Could
someone explain how to do this or cite me to a web
article?

Thanks and 73, Bill NZ5N




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