In my experience, both are true, but it depends on the frequency, the
tree, atmospheric conditions, and whether the trees are wet or dry.
I recall a subscriber that is ~~ .5 mile from a 900 MHz AP. NLOS the
whole way. We put the SM on the highest point in the house, and the
signal would go in and out seemingly at whim.
Well there was a Madrone tree about 100-150 feet away at approximately
the 7:30 position. I had the SM down on a hand-held mast while I was
adjusting something, and happened to aim the SM at the Madrone tree. I
had the audio headset on, and the audio tone went off the charts. I
suddenly realized that the source of the problem was the Madrone tree.
The only problem was that it was reflecting only part of the time
(otherwise I might have just aimed the SM at the damn tree).
Instead, we put the SM on the other side of the house, effectively
making the NLOS worse, but sufficiently blocking the reflections from
the Madrone.
YMMV
bp
<part15sbs{at}gmail{dot}com>
On 8/26/2015 9:27 AM, Adam Moffett wrote:
I've always thought of trees as a source of attenuation rather than
reflection
