LAPLACE INSTRUMENTS RF300 Mk II-A, Руководство пользователя

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Laplace Instruments Ltd
Page 13
3.3 (d). The final loop is
now fitted INSIDE the other
two. See fig 14.
This fits in the upper slot in
the central pillar and under
the other vertical loop at
the top. Again arrange the
loop so the transducer is
close to the central pillar.
3.3(e). The loops can now
be adjusted for best shape
and position. Generally the
vertical loops will tend to
sag into the lower half of
the antenna. These are held
up in position by using the saddle clips on each corner post to take some
on the weight of the loop. The top of the vertical loops can be adjusted
for best shape and the two loops fastened together with the tiewraps as
shown in fig 15. With care, the tiewraps can be adjusted to produce
reasonable circles for each loop.
Note that the exact shape is not critical. Deviation from perfect circles is
inevitable but this has no significant effect on antenna performance.
EN55015 states in section 7.2 that
even the position of the UUT in the
antenna is not critical.
Figure 14
Figure 15
Arrangement at top of loops.
Use 2 tywraps in series for adequate
length.