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<DIV><SPAN class=411005005-15012003><FONT face="Courier New" size=2>The easiest
way to think of it (and I hope I'm right with this), is that antenna gain is
bi-directional.</FONT></SPAN></DIV>
<DIV><SPAN class=411005005-15012003><FONT face="Courier New"
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=411005005-15012003><FONT face="Courier New" size=2>eg: It will
boost the power of signal you are transmitting out of it AND the power of the
signal coming into it by the same amount.</FONT></SPAN></DIV>
<DIV><SPAN class=411005005-15012003><FONT face="Courier New"
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=411005005-15012003><FONT face="Courier New" size=2>Due to that
(in the situation you describe), your directional not only beams a focused RF
beam to your omni, but also focuses the 'faint' signal from the omni in exactly
the same way.</FONT></SPAN></DIV>
<DIV><SPAN class=411005005-15012003><FONT face="Courier New"
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=411005005-15012003><FONT face="Courier New" size=2>There has
been some talk of some cisco wireless devices that can bind one antenna to send
and the other to receive (NOT diversity), so you could put the maximum legal
antenna on the send side (to acheive your 4W EIRP) and a HUMUNGOUS dish on the
receive side (think radio-telescope size), and get really long
distances.</FONT></SPAN></DIV>
<DIV><SPAN class=411005005-15012003><FONT face="Courier New"
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=411005005-15012003><FONT face="Courier New" size=2>How
practical this is, I don't know, but it would be fun to try
:)</FONT></SPAN></DIV>
<DIV><SPAN class=411005005-15012003><FONT face="Courier New"
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=411005005-15012003> <FONT face="Courier New"
size=2>Fenn.</FONT></SPAN></DIV>
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<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left><FONT
face=Tahoma size=2>-----Original Message-----<BR><B>From:</B>
owner-melbwireless@wireless.org.au [mailto:owner-melbwireless@wireless.org.au]
<B>On Behalf Of </B>Jason Brice<BR><B>Sent:</B> Wednesday, 15 January 2003
4:36 PM<BR><B>To:</B> melbwireless@wireless.org.au<BR><B>Subject:</B>
[MLB-WIRELESS] Antenna Overlap<BR><BR></FONT></DIV>
<DIV><FONT face=Tahoma size=2><SPAN class=356032805-15012003>One of
the things im not really clear on with respect to Antennas and the whole
RF thing;</SPAN></FONT></DIV>
<DIV><FONT face=Tahoma size=2><SPAN
class=356032805-15012003></SPAN></FONT> </DIV>
<DIV><FONT face=Tahoma size=2><SPAN class=356032805-15012003>If i have a low
gain omni with an effective range of say... 1km and i have a high gain dish
(enough to include the omni in the signal range) some 15km away pointed at the
omni, i understand that the omni can pick up the radiated signal from the
dish, but is the dish able to pick up signal from the omni at that range? and
if so why is that? :)</SPAN></FONT></DIV>
<DIV><FONT face=Tahoma size=2><SPAN
class=356032805-15012003></SPAN></FONT> </DIV>
<DIV><FONT face=Tahoma size=2><SPAN class=356032805-15012003>Feel free to post
an RTFM link if this has been asked and answered. Im new to the whole RF side
of things.</SPAN></FONT></DIV>
<DIV><FONT face=Tahoma size=2><SPAN
class=356032805-15012003></SPAN></FONT> </DIV>
<DIV><FONT face=Tahoma size=2><SPAN
class=356032805-15012003>Thanks,</SPAN></FONT></DIV>
<DIV><FONT face=Tahoma size=2></FONT> </DIV>
<DIV class=Section1>
<P class=MsoAutoSig><STRONG><SPAN
style="FONT-SIZE: 10pt; COLOR: gray">________________________</SPAN></STRONG><B><SPAN
style="FONT-SIZE: 10pt; COLOR: gray"><BR></SPAN></B><SPAN
style="FONT-FAMILY: Arial">jason<STRONG><SPAN
style="FONT-FAMILY: Arial"> brice</SPAN></STRONG><B><BR></B></SPAN><I><SPAN
style="FONT-SIZE: 10pt; COLOR: gray; FONT-FAMILY: Arial">senior network
engineer<BR></SPAN></I><SPAN
style="FONT-SIZE: 10pt; COLOR: gray; FONT-FAMILY: Arial">kiandra system
solutions<BR>level 9, 455 bourke st melbourne vic 3000<BR>(t) +61 3 9600
1639<BR>(f) +61 3 9600 1656</SPAN><o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P></DIV>
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