I have quite abit of G out there. All the clients and ap's I install
today are G.
60's is great, 70's work just fine too.
60's get top performance, 70' is still a great very fast connection and
even low 80's beat B.
B stands for Bad
G stands for Good
Marlon K. Schafer wrote:
It's not about antenna size. It's about signal levels.
Most g radios need -60ish signal levels to work well. Use the antennas
that you need to make it work right.
Find the sensitivity levels of the product you are using, run the calcs,
and compute a 10 dB or so fade margin.
laters,
marlon
----- Original Message ----- From: "Tom DeReggi"
<[EMAIL PROTECTED]>
To: "WISPA General List" <wireless@wispa.org>
Sent: Saturday, February 03, 2007 12:38 PM
Subject: [WISPA] Typical OFDM CPE antennas
I wanted to get some feedback from the List.
Typically, what Dbi gain antennas are you desiring for OFDM short
Near-LOS or Mid-range CPE links?
Is 18 dbi enough?
I'm well aware that 18dbi will not be good for many applications (long
range or noisy), but what percentage of CPE installtions would it be
good for?
Could 75% of the CPE installs be acheived with 18dbi?
I personally, would pick a 21-23db antenna as a preferred choice, but
PacWireless Rootennas are 19dbi, and often used with 13-15 dbm CM9
cards. The beamwidth of 18dbi (< 20-30 degrees) is pretty good for
interference resilience and OFDM maximized, and if more gain was
needed it could be accommodated with higher power radios such
Teletronic's >18dbm Atheros cards or Ubiquiti's SR5 18-26db cards.
Tom DeReggi
RapidDSL & Wireless, Inc
IntAirNet- Fixed Wireless Broadband
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