Uhf satcom antenna design

From the design of the first breathing regulator for Project Mercury, to a full suite of hardware and cutting-edge pneumatic subsystems for the ISS, Cobham has engineered some of the most complex, challenging space components in existence today. Cobham builds ultimate reliability into life support From internet in the sky through to jamming and missile guidance for the latest fighter aircraft, Cobham has an innovative suite of avionics, communication and navigation products for an From lightweight composite CNG tanks for automotive, to wireless coverage in the world's tallest building, Cobham has a variety of land based solutions for commercial and defence applications.

Our advanced Ground Penetrating Radar detection, and secure communications support security forces and Cobham also offers an innovative range of safety and survival equipment, includi Chelton Limited trading as Cobham Aerospace Connectivity.

uhf satcom antenna design

Chelton, Inc. Space From the design of the first breathing regulator for Project Mercury, to a full suite of hardware and cutting-edge pneumatic subsystems for the ISS, Cobham has engineered some of the most complex, challenging space components in existence today. Land From lightweight composite CNG tanks for automotive, to wireless coverage in the world's tallest building, Cobham has a variety of land based solutions for commercial and defence applications.

Home Communications and Conne Aerospace Connectivity Antennas for Communicati Product Contacts. Do PostBack.Measures: 1. Backpack models available weighing 1 lb includes small pouch, groundplane, antenna and cable.

Available in Olive Drab, Black and White. For more details, request White Paper. Available to recognized parties only. This antenna was designed for shipboard and fixed site use, where direct, simultaneous communications with satellite, ground, shipborne and airborne platforms are to be maintained. To fulfill this mission, UCB1 antennas were designed to radiate a small portion of the supplied RF power with Vertical Polarization.

At low elevation angles, where ground, sea and air platforms are typically located, both horizontally and vertically polarized waves are radiated to match any type of antenna. When the -B1 antenna is installed low, close to the ground or a large metal structure, the vertically polarized waves better survive earth multipath, maintaining communications at low elevation angles where other SATCOM antennas would fail.

Skip to content. Facebook page opens in new window. UHF Satcom Antenna. Operating Frequencies : MHz.From the design of the first breathing regulator for Project Mercury, to a full suite of hardware and cutting-edge pneumatic subsystems for the ISS, Cobham has engineered some of the most complex, challenging space components in existence today.

Cobham builds ultimate reliability into life support From internet in the sky through to jamming and missile guidance for the latest fighter aircraft, Cobham has an innovative suite of avionics, communication and navigation products for an From lightweight composite CNG tanks for automotive, to wireless coverage in the world's tallest building, Cobham has a variety of land based solutions for commercial and defence applications.

Our advanced Ground Penetrating Radar detection, and secure communications support security forces and Cobham also offers an innovative range of safety and survival equipment, includi Cobham Antenna Systems SATCOM antennas use strong and durable composite radomes to ensure our antennas survive in the field and offer the user reliable Satellite communications in the most demanding of environments. Cobham's expanding range includes coverage of legacy and MUOS operating bands and also includes the provision for operation independent of metallic ground planes, giving the user greater flexibility for installation and ensuring maximum overall performance for the platform.

Chelton Limited trading as Cobham Aerospace Connectivity. Chelton, Inc. Space From the design of the first breathing regulator for Project Mercury, to a full suite of hardware and cutting-edge pneumatic subsystems for the ISS, Cobham has engineered some of the most complex, challenging space components in existence today. Land From lightweight composite CNG tanks for automotive, to wireless coverage in the world's tallest building, Cobham has a variety of land based solutions for commercial and defence applications.

Home Communications and Conne Aerospace Connectivity Antennas and Terminals f UHF Satcom Antennas. View our products. Product Contacts. Do PostBack.The Pennyloop UHF antenna offers high performance in a very simple and cost effective design. It is also a very compact design lending itself well to a variety of mounting options and locations inside and outside. Outside will give the best performance.

The Pennyloop antenna started out as a single loop antenna and could be used with a reflector. It was found through extensive testing, at least in my area, that the UHF signal strength is very "layered".

A single loop antenna, or even a simple thick element dipole for that matter, would pick up all of my distant stations - Just not at the same height! A new design emerged from this common issue with UHF signals. The antenna did not need to be excessively tall, but needed some additional height to cover each of the signal layers at the same time. This design goal was achieved in the Pennyloop by having a second loop installed on the original feed point.

It served several purposes. It increased the gain substantially, focused more on the horizon where the signals were coming from, and gave the additional height needed to be in each of the signal layers simultaneously.

As with all antenna designs, there are compromises. Some antennas are omni-directional with little gain, and some are very directional with high gain. My antenna design, the Pennyloopoffers fairly high gain and is bi-directional without a reflector.

Homemade Satcom antenna.

It will work equally well, in both directions, which is great if you have antennas on each side of your location. The Pennyloop antenna was designed to be very easy to construct with basic tools and skill levels and the design is for coax feed - through an appropriate ground block - to the television set. This makes for a very easy and straightforward connection.

UHF SATCOM Antennas

A few building and performance notes: Do not use any more coax than necessary to connect your antenna to the TV. Roughly speaking, you can expect about a. In a 50 ft.

A loss of 3dB is half of your signal! The prototype of the Pennylooppictured, has 51' of RG-6 that runs through a 3 GHz ground block to the TV and it is mounted at a height of 18' on my mast - easily receiving all of the stations that are located 55 miles away!

I do not use an amplifier. Also, all connections, especially those going through splitters, will reduce your signal to the TV. If a connection is necessary between lengths of coax, be sure to use a low loss splice barrel connector. These are available, like the ground block, for 3 GHz. A search on www. It will be necessary for you to aim the antenna towards the best, or desired, signals you wish to receive. The broadside or flat side should be pointing to the transmitting antenna and you should be able to look through the hole in the loop s towards the transmitting antenna direction.

If you have multiple transmitters in one direction, or transmitters on both sides of your location, you can average it or you can point more in the direction of the lower powered stations. The antenna has a null off each edge, much like other loops, dipoles and yagi designs, but has a wide beamwidth front and back - without a reflector installed that makes it very nice for most installations.

The mast mount described in this Instructable makes it very easy to mount and aim your Pennyloop Antenna. Be aware that OTA Over-the-air television signals can be influenced by a number of things to include obstacles, terrain, weather, time of day and year, antenna height and aim, quality of build, etc.Forums New posts Search forums.

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uhf satcom antenna design

Joined Feb 19, Messages 6, Location N. Why would you need to spend thousands? I sure didn't. I find that the T makes for an excellent receiver and ProScan makes unattended logging a simple task. Instead of a logging program you can let the radio search and use a free recording program with squelch to get an idea of activity. If you search around you can find surplus military satcom antennas for reasonable prices, its not as common compared to 10yrs ago but there available.

Joined Feb 24, Messages 0 Location Virginia. These satellites are geostationary. I would recommend getting a March and June issue of Monitoring Times which will point out satellite locations and basic antenna requirements. Except for doing some antenna comparisons using continuous data carriers and listening to the usual pirates I have not spent much time searching for in the clear military comms.

But they are there, you have to invest some time searching around to MHz and in 5KHz steps to catch odd stuff that pops up.Hey brother! I've enjoyed reading about your antenna construction. I am unable to find the 4th installment and how you did it. I understand if you didn't share because it was a pain to build Just let me know Deryl deryl.

Post a Comment. Heck, I had on many occasions built home-brew UHF Yagi beams and in fact sold quite a few in the past, offering them for sale on my now long defunct Intercepts Newsletter — with many of them still in use today. All it would take I figured was some educated-best guess-photogrammetric analysis with something in the image to indicate scale and I could probably Yankee-engineer a decent-working-prototype with the final goal selling either antennas or the plans to build their own to like-minded UHF MILCOM aficionados like myself.

I again pumped the airman in charge of the display for information about the system and took a few close-up photos. I try to reassure him by saying I was a communications-technology-enthusiast, which from his reply he took to mean ham-radio-operator. He tells me in civilian life he is a ham.

uhf satcom antenna design

My reply apparently put him at ease as he proceeded to fill me in on more technical details about the DAMA system, even going so far as to show me how to find the elevation and azimuth of the military satellite his rig was communicating through. Later as I examined my photos I came to the false realization that the antenna must be a simple X-beam design. The driven elements looked much like two folded dipolesattached to a short boom six feet situated behind a series of x-shaped directors with a wire-mesh reflector at the back.

How hard could that be to replicate? Using the photos as my guide, I experimented and over the years I built many antennas.

Sensor Systems Inc., Aircraft Antenna

The most I could ever manage were choppy or weak, static filled brief intercepts. Like other companies of this type, seeking lucrative government bid-approval, specifications of all their products are SOP posted online in downloadable Adobe Acrobat. However, standing out clearly among the usual obtuse list of equipment specifications, frequency ranges and MilSpec nomenclature was something I had never seen - a simplified three-view drawing of their manpack foldable UHF SATCOM antenna known as the AV — complete with metric dimensions.

Was this the missing data I needed? I quickly downloaded the. I then took it to my computer guru, Wilhelm Scream not his real name since he is to math what Lance Armstrong is to cycling. He took a long look at the three-view and the dimensions posted, produced a set of digital calipers and placed them on the drawing.Sorry about the delays - work - a family emergency and a lingering illness has kept me from getting back to the article, Look for it soon after the New Year. Does this need to be aligned in any specific relation to the element director, or the web on the back?

Im assuming the web on the back is all still just welding rod? It looks as though these rods are wider "ish? Are they all electrically common? On this web, Im assuming the material connecing the the rods together in the web is the solid conductor wire? Is it supposed to be electrically common with the rods?

If so, should it be stripped? Will 10ga suffice or should another size be used? With the element director, it doesnt seem as though any of these rods are electrically connected to anything at least as of yetis there any reason some clever machining couldent be used to make these elements foldable for transport purposes? Thanks, Darby. They need to be very close to 5" in length in order to meet the 5" spacing requirement for the director elements.

Using the 5" spacing between elements, makes the overall boom requirement of 32" difficult to meet. Also some of your pre construction photos show 6 directors and the actual boom shows seven. Waiting for more info on matching section. Great plans. Hi steve Douglass Thank you very for posting this antenna how-to; I love it as I couldn' affort to buy one with ebay Please, please, please finish this tutorial I have been waiting patiently for at least a year checking back every few months and nothing :.

Steve, I too have been waiting for the conclusion to your sat antenna construction article. Please finish the article and make a LOT of us very happy!! We are eagerly waiting to be able to finish our antenna. Thank you very much!! Please, Please, Please Steve can we have the conclusion to this design? My SDR is screaming out at me to make one for it. Is there not a ? Love the work Deryl deryl. Just started with the sdr systems


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