This is a side on view of the Waste Water Pipe Helical
antenna. The Cable ties are there to hold the pipe on.
You can just see the conductor at the middle of the
top of the image - the silver. It is covered with
electrical tape. There are 1 3/4 turns of the tape in a
spiral, with 1/4 turn added paralell to the base. Soldered
to the end of this wire is the circuit board below.
This board contains a MAR-6 MMIC, although an ERA-3
should be used. The earth from the coax and the MMIC
is connected to the ground plane. The MAR-6 is available
from http://www.clarke.com.au/
This is a side view
From the top. The copper is 19 cm in diameter, although
the exact size is not important. Notice the whitish ring
round the outside. That is the top of a microwave dish
purchased from K-Mart.