11-16-2010, 10:30
|
#1
|
Asset
Join Date: Mar 2008
Location: Fayetteville, NC
Posts: 14
|
man pack Sat Ant
I have been working for a company that is now building a man pack sat on the move will cover the required freq ranges 225-350MHz and will clip on to your pack or directly to the radio. all of this is packaged into a mold and will fit in your pocket.
this antenna has gone through several testing phases and it is determined that it is ready for production, i was able to have it tested over seas and state side with the only failures coming when the take off angles was less then 25deg but at that angle there are not many antennas that will make it.
i have redesigned the elements so that they are rigged and will come back to their origanal position, and with a VSWR of 2.5:1 or less Avg.
this is not the end all be all it has taken the field expediant antenna and improved on the concept and packaged in a form fit factor and made it a durable antenna.
Last edited by brushingham.d; 07-05-2011 at 13:27.
|
brushingham.d is offline
|
|
11-16-2010, 18:21
|
#2
|
Quiet Professional
Join Date: Jan 2004
Location: Wherever my ruck finds itself
Posts: 2,972
|
I know a couple guys who are interested...
PM sent.
__________________
"It's better to die on your feet than live on your knees."
"Its not who I am underneath, but what I do that defines me" -Batman
"There are no obstacles, only opportunities for excellence."- NousDefionsDoc
|
Surgicalcric is offline
|
|
11-16-2010, 19:04
|
#3
|
Auxiliary
Join Date: Apr 2010
Location: CONUS
Posts: 79
|
PM'd
|
J8127 is offline
|
|
11-16-2010, 23:30
|
#4
|
Quiet Professional
Join Date: Oct 2006
Location: East Bay, CA
Posts: 4
|
I would love to test this out. PM inbound.
|
Gully is offline
|
|
11-17-2010, 08:41
|
#5
|
Quiet Professional
Join Date: Apr 2006
Location: Lower Alabama
Posts: 649
|
Looks a lot like a field expediant that was being used in Iraq. Basically a couple of connectors w/ a coat hanger shaped like a rams head soldered on. That one had to be cut to a specific freq though.
x/S
__________________
If not us, than who?
|
exsquid is offline
|
|
11-20-2010, 08:56
|
#6
|
Asset
Join Date: Mar 2008
Location: Fayetteville, NC
Posts: 14
|
man pack sat ant
i will post a data sheet on monday. this idea began in 5th sfg and i can't remember his name...(must be getting old) if you are on here then please im me so that i can send you one.
|
brushingham.d is offline
|
|
06-19-2011, 04:24
|
#7
|
Quiet Professional
Join Date: May 2004
Location: in the blast radius
Posts: 29
|
old post
I believe that is "electron"
__________________
"You've had your whole life to prepare for this moment, are you ready?"
|
resonant evil is offline
|
|
06-19-2011, 11:34
|
#8
|
Quiet Professional
Join Date: Jan 2006
Location: N.E.WA
Posts: 1,137
|
Hey brush,
You have any more of these to test?
Correct me if I'm wrong, but weren't you in the 1/5 commo shed the last few yrs of your career?
__________________
"Most of us here can attest that we never took the easy way. Easy just is............easy. Life is a work in progress, and most of the time its a struggle." ~ Me
"Every normal man must be tempted at times to spit upon his hands, hoist the black flag, and begin slitting throats." -Henry Louis Mencken (1880-1956)
"A Government that is losing to an insurgency is not being outfought, it is being out governed." Bernard B. Fall
|
LongWire is offline
|
|
07-14-2011, 20:16
|
#9
|
Guerrilla
Join Date: Apr 2008
Location: Fayetteville, NC
Posts: 280
|
I have a couple of Brushinghams antennas in my office that he gave me last year.
They work as claimed. It does need an amplifier with at least 25 watts and and 11 db of receive gain. They do not yet have the circular polarization, but that is overcome with the amp.
|
69harley is offline
|
|
07-15-2011, 06:27
|
#10
|
Quiet Professional
Join Date: Dec 2010
Location: Dallas, TX
Posts: 515
|
It looks like Shakespeare is the manufacturer of this antenna.
http://shakespeare-military.com/mila...show.asp?t=100
Their contact information is here.
__________________
DCC
"Beware the fury of of the patient man." ~John Dryden
|
Paragrouper is offline
|
|
07-02-2012, 08:47
|
#11
|
Guerrilla
Join Date: Apr 2008
Location: Fayetteville, NC
Posts: 280
|
I saw an RFQ for this on Fedbizops this morning. Looks like 3rd SFG(A) is looking to prucure a bunch of them.
Just looked at the current design on the manufacturers website. Still appears to be the same basic low-gain and not radial polarized desighn.
Does anyone know if Shakespeare fixed the polarization and extremely low-gain issues?
|
69harley is offline
|
|
07-04-2012, 17:46
|
#12
|
Quiet Professional
Join Date: Dec 2010
Location: Dallas, TX
Posts: 515
|
Quote:
Originally Posted by 69harley
I saw an RFQ for this on Fedbizops this morning. Looks like 3rd SFG(A) is looking to prucure a bunch of them.
Just looked at the current design on the manufacturers website. Still appears to be the same basic low-gain and not radial polarized desighn.
Does anyone know if Shakespeare fixed the polarization and extremely low-gain issues?
|
This is a simple center fed dipole antenna. If you look at the geometry of an X-blade, which provides right-hand circular polarization it is nothing more than two dipoles with some tricks in the feed network to obtain RHCP. Theoretical max gain for this antenna is 2dBi and is dependent on the ground plane to develop a good radiation pattern.
It's best advantages are the size, ease of deployment and the cost. If one was to use this in an area where you have a high look-angle WRT the satelite and no significcant obstructions the antenna should overcome the gain deficit and loses related to polarization mismatch and work fine. Outside of those conditions...
Maybe not so good.
__________________
DCC
"Beware the fury of of the patient man." ~John Dryden
|
Paragrouper is offline
|
|
08-05-2013, 18:59
|
#13
|
Guerrilla
Join Date: Apr 2008
Location: Fayetteville, NC
Posts: 280
|
Any feedback on these RamHead antennas yet?
|
69harley is offline
|
|
08-08-2013, 01:57
|
#14
|
Quiet Professional
Join Date: Mar 2012
Location: Okinawa, Japan
Posts: 9
|
I have done some limited testing in a-stan:
Dependent on ground plane, with connection to 152 and running a ping test, max results were at 40% without an amp. Didn't have an amp available to test it with.
|
Whitetip1115 is offline
|
|
08-08-2013, 05:57
|
#15
|
Guerrilla
Join Date: Apr 2008
Location: Fayetteville, NC
Posts: 280
|
What elevation does that shot typically call for? 40% seems pretty low to me. Do you think that is an acceptable strength, would you go across the FLOT with that as your primary?
|
69harley is offline
|
|
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
|
|
Thread Tools |
|
Display Modes |
Linear Mode
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
All times are GMT -6. The time now is 06:18.
|
|
|