开云体育

I made a Flat Patch antenna based on a design presented at Pacificon
Antenna Seminar 10 or more years ago. It's just a couple pieces of
sheet aluminum, nylon nuts on nylon bolts and a BNC connector. It
works quite well, although I don't have a way of measuring gain. It's
also not in any weatherproof container (Tupperware?), so I don't use
it outside except temporary.

I built a "Controlled Impedance Yagi Antenna" from an article for
1.2G, and it works Very Well. According to the article, the 10
element antenna has 13 dBi gain. I think the total cost to me was
about $5.00 until I added decent coax. It uses a stick and copper
wire, and dimensions are to ? inch. I used a hand drill, not a press.
I can forward the article if you want. It can be waterproofed for
outside use. The only issue is you need a way to measure SWR at this
frequency to make sure you have a working antenna. With this antenna
I've reached K6MDD-A from near Yosemite at over 110 miles.

The original article for this antenna is in the Files section of this
group, although there was a newer article produced after D-STAR
arrived and it has a couple different dimensions. This article also
has a "Simple Vertical Collinear Antenna" with about 5 to 6 dBi gain
designed for mobile use. It's 10" overall height.

73, Arnold

KQ6DI