Many commercial FM stations use circular polarization for this very reason, they have no idea if their listner's are vertical, horizontal or somewhere in between. Hence, with circular polarization, the worst cross polarization hit they take with the listner's (laptop) linear polarizations is 3db as opposed to the 20db or more if the station (AP) where to be vertical or horizontal.
Quoting Jim Thompson <[EMAIL PROTECTED]>: > Horizontal, mostly (if there is any polarization at all.) > > On Thursday, October 16, 2003, at 7:51 AM, Brian Lloyd wrote: > > > Most 802.11[a|b|g] cards have a "dongle" antenna as part of the card. > > > Does anyone know the plane of polarization these cards represent when > > > placed in a laptop which is on a level table? I am trying to decide > > > whether it makes more sense to use horizontal or vertical > > polarization. If they use circular polarization I would like to know > > > the sense, i.e. left-hand or right-hand. > > > > Thanks! > > > > -- > > > > Brian Lloyd 6501 Red Hook Plaza, Suite > 201 > > [EMAIL PROTECTED] St. Thomas, VI 00802 > > +1.340.998.9447 - voice +1.360.838.9669 - fax > > GMT-4 > > > > -- > > general wireless list, a bawug thing <http://www.bawug.org/> > > [un]subscribe: http://lists.bawug.org/mailman/listinfo/wireless > > -- > general wireless list, a bawug thing <http://www.bawug.org/> > [un]subscribe: http://lists.bawug.org/mailman/listinfo/wireless > -- general wireless list, a bawug thing <http://www.bawug.org/> [un]subscribe: http://lists.bawug.org/mailman/listinfo/wireless
