This message concerns an antenna used for EMC measurements but I am
sure you will be able to reply.

We are setting up an EMC testing laboratory, one of the (very
impressive!) antennas that will be used is a "Stacked
Logarithmic-Periodic Test-Antenna", the details of which are in
http://www.schwarzbeck.de/k9128e.pdf.

The antenna has been assembled, but the elements were not placed as in
the photo (see pdf). Let me try to explain:

The elements were not placed diagonally opposite, as I imagine is
required. (If the uppermost longest element is on the right, the next
lower longest element should be on the left, as far as I can
understand.)

I imagine that this will affect the directional 'balance' of the
antenna, although I have no prior knowledge of EMC testing, just a
basic understanding of antenna theory.

+
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| | + Top "layer" of antenna shown.
| | | next "layer" should be mirror image...
| | | + (or should it?)
| | | |
.+-----+-----+-----+----.
'---+-----+-----+-----+-'
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