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Ran 3 new sector antennas through their paces:<br>
<br>
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<div><a
href="https://www.hamwan.org/t/tiki-index.php?page=ITelite+Sector+50018H&structure=HamWAN"
class="link" title="">ITelite Sector 50018H</a></div>
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<div><a
href="https://www.hamwan.org/t/tiki-index.php?page=RF+Elements+SECM5120&structure=HamWAN"
class="link" title="">RF Elements SECM5120</a></div>
</li>
<li class="toclevel">
<div><a
href="https://www.hamwan.org/t/tiki-index.php?page=Teletronics+15-704&structure=HamWAN"
class="link" title="">Teletronics 15-704</a></div>
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<br>
The results are underwhelming. The ITelite was looking very good on
FR and absolute gain, but then it totally fell apart on the
radiation pattern. The RF elements has very poor gain @ the upper
ham frequencies. The radiation pattern of this antenna is quite
good though, if only we were using it lower down. The Teletronics
has pretty low gain @ the upper ham frequencies, but more
importantly, the radiation pattern is just broken. Almost a -20dB
null @ 320 degrees.<br>
<br>
I've updated the <a
href="https://www.hamwan.org/t/tiki-index.php?page=Antenna+Shootout&structure=HamWAN">Antenna
Shootout</a> page to add the results of these 3 new antennas. Had
to normalize them to the 100m range standard levels. I also
re-measured many of the other sector antennas on the 8m range and
normalized their results to 100m range equivalents. Things are
measuring mostly consistently. The largest delta is the 16dBi
Ubiquiti sector, which lost 2dB of gain in the re-test. I re-ran
the radiation pattern on it as well, since I noticed the peak gain
involved adding a bit of up-tilt to compensate for the built-in
electrical downtilt. The new radiation pattern is not so bad.<br>
<br>
So far the best sector is looking like that Laird I originally
bought. Need to rig up vertical plane radiation pattern measurement
capabilities. A narrow vertical beamwidth can kill a decent
horizontally behaving sector. Unidirectional antennas are so much
easier to deal with!<br>
<br>
--Bart<br>
<br>
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