Hi Tom Ah I didnt realise there were such beasts....I probably have not the
time left now but it is one to consider.
Yes I might have to watch the patch polarisation. I did consider two L-band
waveguide transitions at one stage but thought that might be going too far
:-)) I thought of the on-glass antenna used in the days of "The Brick" on
mobile cellular, or amateur and commercial 2-way radios.
Thanks again for the ideas.
Alan
G3NYK
----- Original Message -----
From: "Tom Van Baak" <t...@leapsecond.com>
To: "Discussion of precise time and frequency measurement"
<time-nuts@febo.com>
Sent: Monday, April 08, 2013 10:12 PM
Subject: Re: [time-nuts] GPS antenna??
Alan,
Google for words like GPS re-radiator or GPS repeater. There are also
units on eBay. If not to buy, at least to study examples.
The one I have is made by www.gpssource.com but it seems you could build
one yourself. It's easy to test by looking at your indoor SV count and
reception levels. With patch antennae you don't have to worry about RHCP
issues, right?
/tvb
----- Original Message -----
From: "Alan Melia" <alan.me...@btinternet.com>
To: "time-nuts measurement" <time-nuts@febo.com>
Sent: Monday, April 08, 2013 9:59 AM
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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