[time-nuts] Difference in GPS antennas

[Dick Moore]

On Aug 14, 2009, at 9:27 AM, time-nuts-request at febo.com wrote:

Maybe why choke rings are rings.
>
>
> Message: 9
> Date: Fri, 14 Aug 2009 09:27:52 -0700
> From: "Lux, Jim (337C)" <james.p.lux at jpl.nasa.gov>
> Subject: Re: [time-nuts] Difference in GPS antennas
> To: Discussion of precise time and frequency measurement
> 	<time-nuts at febo.com>
> Message-ID: <C6AADE98.9BE6%James.P.Lux at jpl.nasa.gov>
> Content-Type: text/plain; charset="iso-8859-1"
>
> clip>>>>
> I've tried the pizza pan thing, but that was because my antenna was a
> magmount, and it was convenient. I didn't see if it gave better  
> performance.
> A flat plate might actually be worse than putting the bare antenna  
> up on a
> pole, because it gives strong multipath from a very close reflection  
> point.