On 10 Jan 2006 23:57:15 -0800, "kevincw01" wrote:

sorry to have to ask but what is SWR? My guess is sound to [somthing]
ratio?

Standing wave ratio. It is a measure of how well (in this case) the antenna
system accepts the energy sent to it up the transmission line and radiates it,
compared to reflecting it back to the source transmitter. The transmission line
should be 50 ohm coax in your case. If the tranmission line/system has serious
impedance variation or discontinuity, power is reflected back to the source
rather than passing along the line.

As the through-glass coupling system employs frequency-sensitive tuned circuit
elements, a substantial change in frequency as you suggest will certainly create
a serious impedance discontinuity. Overall transmission efficiency pooter-
antenna would be very poor as a result. You may well find that a decent 2.4G
antenna on the pooter inside the vehicle is more efficient.