[time-nuts] GPS antenna??

Alan Melia alan.melia at btinternet.com
Mon Apr 8 15:45:54 EDT 2013


Hi Bob yes it is South facing.....I may have todo that anyway because the 
window may be too far above ground level (the land slopes away from the 
ground entrance...... pity I had totally forgotten that.

Thanks
Alan
G3NYK

----- Original Message ----- 
From: "Bob Camp" <lists at rtty.us>
To: "'Discussion of precise time and frequency measurement'" 
<time-nuts at febo.com>
Sent: Monday, April 08, 2013 8:28 PM
Subject: Re: [time-nuts] GPS antenna??


> Hi
>
> Is the proposed window south facing? If not, you will need enough cable
> outdoors to get your second antenna to a south facing location.
>
> Assuming it's south facing and reasonable sky view, have you tried a patch
> antenna on / at the window? That should at least give you some idea of how
> likely the signal is to get through it. It's not uncommon to run GPSDO's
> with window mounted antennas.
>
> Bob
>
> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
> Behalf Of Alan Melia
> Sent: Monday, April 08, 2013 1:00 PM
> To: time-nuts measurement
> Subject: [time-nuts] GPS antenna??
>
> Hi all an interesting problem you may have encountered, I want to use a 
> GPS
> frequency standard inside a building with no opening windows (opening
> windows are known as air conditioning in the UK :-))  )
> This is part of a two day amateur microwave conference so we should have 
> the
>
> expertise.
>
> I intend to try and pass the signal through a a double glazed glass window
> unit (hopefully not metalised) using a couple of patch antennas. The outer
> GPS antenna is active so will need  a 5v supply via an inserter. Inner 
> patch
>
> active, outer patch passive to avoid problems of feedback. Main antenna 
> can
> be shielded from the "coupling" either physically or with a slab of
> absorber.
>
> Has anyone tried this?.... does it work?.....any gotchas?
>
> Thanks
> Alan
> G3NYK
>
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>
>
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to 
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there. 



More information about the time-nuts mailing list