Tom:
You present a very interesting paper for the Symposium. What
is your next step? When are you going to construct a test bread board of an
array? To do this you need an amplifier concept as an element of the antenna. In
the recent past (~2 years) we started such an amplifier examination but the effort
withered, apparently, and not much came of it as I remember. I recognize that
there are a number of closely related electronic, mechanical, and thermal
issues for such an amplifier element, along with Dan’s delay line and
other aspects.
As I see it, getting started in such an amplifier
element, now that you have a concept for the beam steering, is just as
important to the Eagle project as is such work that has been done recently on
the U receiver by John and Juan. I realize that the electronic aspects of such
hardware is somewhat of a moving target (the pace of developments in that
field), but somewhere you will have to put a stake in the ground and say that
this is where we shall start. To be able to deal with the mechanical and
thermal aspects, which are not trivial at all, I would need you to put the
stake in the ground so that I would have a starting point for such an effort.
So what are your plans?
’73,
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Tom
Clark, K3IO
Sent: Sunday, 07 October, 2007 04.11
To: AMSAT Eagle; Matt Ettus
Cc: 'Brian E. Gaffney'; Daniel Schultz
Subject: [eagle] Phased Array Concepts
I have (finally!) put the finishing touches on my magnum
opus describing my ideas on phased arrays and shipped it off to be included in
the Pittsburgh symposium proceedings. If you want to see it, it is available for
viewing at http://mysite.verizon.net/w3iwi/electronic_scanning_antennas.pdf
. This version has some figures in color, but the proceedings is in B&W
(this format is available if you need it).
This took me a lot longer than I anticipated. I had a
couple of fairly major Gates-induced computer failures, some of which still
plague me (like I'm using my notebook for all Email). I advise against the use
of Office 2007.
I am hoping that this week I will have time to test Dan's
hardware so I can have some results to report by Pittsburgh.
Matt -- this has the numbers I was trying to remember
last weekend.
For all -- your comments and critiques are solicited.
73, Tom