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Old Nov 05, 2011, 06:30 PM
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Australia, VIC, Hadfield
Joined Mar 2003
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Bi-Quad build failure - and hints pls?

I've just finished building my first bi-quad at 1040MHz.

Tested it for the first time and it is terrible. The commercial 8 dbi it is intended to replace has heaps better reception in a basic 'reception signal pointed through my house' test. When there's no signal left at all on the bi-qaud, the patch picture is perfect. Humph!

I've attached a couple of photos of the antenna, focussing on my ordinary soldering skills. Nonetheless, the centre conductor and shield conductors are not touching at the intersecting lines of the bowtie, and there is no bridging of solder. At the edge of it's range it does exhibit some polarisation effect.

Can anyone see an obvious error or otherwise make a suggestion on improving it? Thanks in advance. Roger.
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