Howdy Bob -
Hi John,
I don't have LH here.? I've never looked into it.? Will it work with an NMEA
GPS
receiver?
Bob - AE6RV
My error. The T-bolt and LH combination is so common I just assumed you were
using a T-bolt. As to your receiver, I do not know. Perhaps someone else on the
measurement
Subject: Re: [time-nuts] Choke Ring Antenna - Patch Placement?
..
An ideal GPS antenna would not have a lot of gain straight overhead. You have
less atmospheric loss in that direction. What you would want is an antenna
that has some gain at 30 to 60 degrees. That was the issue
Stewart; Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Choke Ring Antenna - Patch Placement?
..
An ideal GPS antenna would not have a lot of gain straight overhead. You
have less atmospheric loss in that direction. What you would want is an
antenna that has
You might want measure the antenna pattern. Lady Heather has a mode that plots
satellite signal level vs azimuth and elevation. You might want to try that. It
takes a day or so to get a complete plot, but you have some hard data to
compare various choke positions.
-73 john k6iql
Hi John,
I don't have LH here. I've never looked into it. Will it work with an NMEA
GPS receiver?
Bob - AE6RV
From: johncr...@aol.com johncr...@aol.com
To: time-nuts@febo.com
Sent: Friday, October 11, 2013 1:05 PM
Subject: Re: [time-nuts] Choke Ring
On 10/11/2013 08:05 PM, johncr...@aol.com wrote:
You might want measure the antenna pattern. Lady Heather has a mode that
plots satellite signal level vs azimuth and elevation. You might want to try
that. It takes a day or so to get a complete plot, but you have some hard
data to compare
-nuts@febo.com
Sent: Friday, October 11, 2013 3:52 PM
Subject: Re: [time-nuts] Choke Ring Antenna - Patch Placement? (Bob Stewart)
On 10/11/2013 08:05 PM, johncr...@aol.com wrote:
You might want measure the antenna pattern. Lady Heather has a mode that
plots satellite signal level vs azimuth
I bought a set of Wilton tuned pie pans yesterday to experiment with a choke
ring antenna. The kit consists of 4 pans of diameters 12, 10, 8, and 6.
The height of the sides is more or less 51mm. I've been experimenting with
placement of the patch in the pit, but I don't know what I'm looking
Oops, that height should be 54 mm.
From: Bob Stewart b...@evoria.net
To: Time Nuts time-nuts@febo.com
Sent: Thursday, October 10, 2013 1:15 PM
Subject: [time-nuts] Choke Ring Antenna - Patch Placement?
I bought a set of Wilton tuned pie pans yesterday
Hi
You are looking for total rejection of any signal below the horizon, and near
total rejection of any signal within 10 degrees of the horizon. Obviously total
and near total could have db numbers associated with them, but the numbers you
get are what ever you get….
Bob
On Oct 10, 2013, at
and frequency measurement time-nuts@febo.com
Sent: Thursday, October 10, 2013 4:41 PM
Subject: Re: [time-nuts] Choke Ring Antenna - Patch Placement?
Hi
You are looking for total rejection of any signal below the horizon, and near
total rejection of any signal within 10 degrees of the horizon
From: Bob Camp li...@rtty.us
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Sent: Thursday, October 10, 2013 4:41 PM
Subject: Re: [time-nuts] Choke Ring Antenna - Patch Placement?
Hi
You are looking for total rejection of any
of precise time and frequency measurement
time-nuts@febo.com
Sent: Thursday, October 10, 2013 4:41 PM
Subject: Re: [time-nuts] Choke Ring Antenna - Patch Placement?
Hi
You are looking for total rejection of any signal below the horizon,
and near total rejection of any signal within 10 degrees
] Choke Ring Antenna - Patch Placement?
Hi
You are looking for total rejection of any signal below the horizon, and
near total rejection of any signal within 10 degrees of the horizon.
Obviously total and near total could have db numbers associated with them,
but the numbers you get are what
Thanks Bob and Don,
Bob:
An
ideal GPS antenna would not have a lot of gain straight overhead. You
have less atmospheric loss in that direction. What you would want is an
antenna that has some gain at 30 to 60 degrees. That was the issue with
the helix antennas. They have gain straight up (and
Hi
The first design principle they seem to use is to attenuate low angle signals.
The assumption is that they are bouncing off ground level targets and then into
the antenna. If there is a second principle (like polarization selection) it's
not really clear how they are getting that job done.
To: Bob Stewart b...@evoria.net; Discussion of precise time and frequency
measurement time-nuts@febo.com
Sent: Thursday, October 10, 2013 8:04 PM
Subject: Re: [time-nuts] Choke Ring Antenna - Patch Placement?
Hi
The first design principle they seem to use is to attenuate low angle signals
Well, this is either strange or it makes sense. It looks like the best pattern
is about where the base/ground plane of the patch is level with the rim, and
the element of the patch, on the top, is sticking above the rim.
Bob
___
time-nuts mailing
What I said That's where the phase center of a feed horn goes...
Don
Bob Stewart
Well, this is either strange or it makes sense. It looks like the best
pattern is about where the base/ground plane of the patch is level with
the rim, and the element of the patch, on the top, is sticking
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