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You
can find equipment enclosures at electronics stores or mail
order them. Polycase
has a great selection of various enclosures and I used their
products for other projects. The actual enclosure I used here
is CM5-125 from Pactec.
It's a little tight for Martin's
biquad so I ended up belt sanding the edges of the PCB to
make it fit in the box. The change of size does not seem to
affect the antenna performance.
Drill
small holes in the biquad PCB to match the hole configuration
in the enclosure [Fig. 3]. Place the antenna face down into
the enclosure [Fig 5]. Drill a center hole into the back of
the enclosure so you can run the cable through it. I used
a foamy ring from a 50 CD-R spindle as a gasket between the
back of the antenna and the back of the enclosure [Fig. 6].
You
will notice that the construction of the biquad pictured here
differs slightly from Martin's design but the same steps are
valid for an antenna built exactly to his specifications.
Fig. 3 Drill holes to match the housing mount |
Fig. 4 enclosure |
Fig. 5 Place the antenna in the enclosure |
Fig. 6 CD spindle foam ring |
Fig. 7 Job done |
Fig. 7 Professionaly looking antenna |
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