[time-nuts] Improving performance of a GPS antenna...?

Azelio Boriani azelio.boriani at screen.it
Wed Apr 4 14:19:05 UTC 2012


So it can be done: try to emulate the Zephyr GPS antenna with the RF
absorber.

On Wed, Apr 4, 2012 at 3:56 PM, Robert Berg <bob.b at pobox.com> wrote:

> You can get inexpensive conductive foam from Amazon.
>
>
> On 4/4/2012 5:53 AM, Michael Baker wrote:
>
>> Hello, Time-Nutters--
>>
>> I saw a rather expensive GPS antenna made by one of the
>> big-name GPS survey equipment mfgrs that was mounted
>> on top of a 12 or 15 inch diameter disc about 3/4 inch thick.
>>
>> Turns out that the disc is made of some sort of RF absorbent
>> foam covered by a weather-proofing coating of some sort.
>>
>> If one were to try to home-brew something like this, where
>> would a small piece of the RF absorbent material be obtained
>> without having to spend too much $$ for this experiment?
>>
>> Thanks for any feedback on this!!
>>
>> Mike Baker
>> WA4HFR
>> ----------------
>>
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