[time-nuts] Choke Ring Antenna - Patch Placement? (Bob Stewart)

Bob Stewart bob at evoria.net
Fri Oct 11 17:30:46 EDT 2013


Thanks Magnus.  I may try that when I get it bolted together.  As it is, it's just four stacked pie pans with a patch antenna perched on a CD sitting on a couple of rolls of electrical tape.  =)





>________________________________
> From: Magnus Danielson <magnus at rubidium.dyndns.org>
>To: time-nuts at febo.com 
>Sent: Friday, October 11, 2013 3:52 PM
>Subject: Re: [time-nuts] Choke Ring Antenna - Patch Placement? (Bob Stewart)
> 
>
>On 10/11/2013 08:05 PM, johncroos at aol.com wrote:
>> You might want measure the antenna pattern. Lady Heather has a mode that plots satellite signal level vs azimuth and elevation. You might want to try that. It takes a day or so to get a complete plot, but  you have some hard data to compare various choke positions. 
>If you tip it on the side and let the bottom be parallel to north-south,
>you can see the cut-off as the sats go in and out over the rimb, and you
>would also get a fair idea of suppression of signals from the lower side
>of the antenna. A little el cheapo testing using what you got.
>
>Cheers,
>Magnus
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