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" <[email protected]>
To: "'Discussion of precise time and frequency measurement'"
<[email protected]>
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: [email protected] [mailto:[email protected]] 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
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