[BC] Re: Commercial Station Feeding A Commercial Translator

[RADIO DOCTOR]

On Wed, 17 Oct 2007, Al Wolfe wrote:

>   They called this the "echelon" antenna configuration. Besides the 
> almost three db gain over one antenna, you supposedly get about twenty 
> db additional rejection from the rear. Also gain some space diversity.

Taking issue with the space diversity part.  Antenna elements that are 
combined to a single receiver become an array which has a 
radiation/reception pattern with a specific center of radiation.  One 
element (antenna) cannot augment another unless they feed separate 
receivers and a circuit decides which one is providing the best signal 
at the moment.  That's the principle of diversity reception, though I'm 
sure it can be stated much better.


...Lyle, FMeXtra evangelist!     Cell: 213-880-4690
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Lyle Henry, CPBE  THE RADIO DOCTOR  K9DKW/K7OO  Silver Lake/Los Angeles
  SCA Consultant, Contract Engr: Brazil, China, Mexico, Taiwan, SE Asia
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