Subj : Antenna
To   : Tom Walker
From : James Bradley
Date : Mon Jul 11 2005 09:29 pm

Dopler shift... I KNEW there was a name for it!

07-09-05  09:16, Tom Walker told James Bradley about Antenna

 How do, Tom?

 JB> JB> TW> Yes they are .They are  Dipole antenna design. 
 JB> JB> And the ends are swe
 JB> JB> TW> back to make then somewhat Omni Directional.
 
 JB> JB>Because of the 'prevailing' winds, right?
 
 
 JB> TW>  ????? Sorry that "joke" went right over the head of this old guy.
 
 JB>Wasn't so much a joke. The prevailing wind is from the direction of
 JB>travel. When the wind blows over the 'occupant compartment', eddies
 JB>around the trunk, ^_  antennae displays an awkward, forever shifting
 JB>polar pattern.


 TW> Wel if you are Serious I suspect the Changing ploorization of hte
 TW> signals bouncing off every thing arround you whilew driving woulr be
 TW> FAr more of a problem then and "Wind Bending" of the Signal, IF there
 TW> is anything at al in Analog Transmissions.
 TW> NOW soem years back when the Local County Sheriffs Department went
 TW> form their Old Analog 400 Mhz band radio system to the New Trunked 80
 TW> 0Mez digital systsm they embarised themslefes. Or at least the Idiot
 TW> Motorola installers. They put digital Radios in the Helicopter Fleet.
 TW> Guess What?? IF the Helicopter travels to fast transiting form place
 TW> ot palce the Doppler Effect makes the radio unusable. :-)  :-)
 TW> Sheepishly they reinstalled a Analog/digital Capable radio. The analog
 TW> dide used for dispatching and the Digital side for on scene
 TW> communications with the officers o nthe ground.
 TW> -!-
 TW> X SLMR 2.1a X This note from El Cajon California USA
 TW>  ! Origin: Try Our Web Based QWK: DOCSPLACE.ORG (1:123/140)



.... Roger Ramjet, Tom! Boldly going forward 'cause we ground reverse.

___ Blue Wave/QWK v2.20

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 * Origin: -=-= Calgary Organization CDN (403) 242-3221 (1:134/77)

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