John Navas wrote in
news:51gav5tq7615kpj02tdpkjh9fe9c9kq4if@navasgroup .com:

http://www.ab9il.net/wlan-projects/wifi1.html

We've tried his type of UHF antennas. The signal to noise ratio in
daylight is horrible from all the back pattern and many side lobes of these
designs for lower frequencies. A yagi isn't a good microwave antenna when
multipath reflections are eating up your data with odd pulsewidths and
pulses and the sun is boiling the molecules in the parking lot. You can
even see the S/N ratio drop by turning on a nearby incandescent light bulb!

Microwave antennas for both 2400 and 5200 Mhz (N band) are too easy to
build out of a Pringle's can or old juice can that can reduce background
radiation and thermal noise by a huge margin.

It's like looking at a distant object with your naked eye in bright
sunlight, squinting because of the glare (noise)......then, looking at the
same object through a paper towel cardboard tube that's been painted flat
black inside (pringle's cantenna). Without all the noise, the object is
much easier to look at. The same is true of these little round microwave
antennas, with or without the internal washer-made yagis to improve the
tuning and bandwidth.



--
Creationism is to science what storks are to obstetrics.

Larry