[time-nuts] GPS antenna??

bg at lysator.liu.se bg at lysator.liu.se
Tue Apr 9 07:52:38 EDT 2013


There are even purpose built"glass mount" antennas-arrangements for sale.

   http://www.antcom.com/documents/catalogs/Page/2G1215A-GMS-X_L1L2GPSAntennas_78.pdf

--

    Björn

> Alan,
>
> I used to do a lot of my Datum demos with customers with antennae up
> against
> a window as outside access wasn't available.
>
> Usually worked OK, unless as you say, the glass is metalised.
> Rob
>
> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
> Behalf Of Alan Melia
> Sent: 08 April 2013 18:00
> 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
>
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