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Topic: High Gain Antenna

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	Antenna Tutorial on Gain and Beamwidth From ATI Space and Communications Training Courses
		High frequencies, and the corresponding small wavelengths, permit the use of antennas having practical dimensions for commercial use.
		Consequently, the gain increases as the wavelength decreases or the frequency increases.
		, the gain is 27,000 or 44.3 dB.
	www.aticourses.com /antennas_tutorial.htm (4441 words)

	Compact folded optics antenna system for providing adjacent, high gain antenna beams - Patent 6424310
		The antenna 10 is a dual offset cassegrain antenna having a main reflector 11, a subreflector 12 and a feed array 13.
		Each antenna beam defines a separate coverage cell in a coverage area with the coverage cells being arranged so that no coverage cell defined by an antenna beam associated with one dual offset cassegrain antenna is contiguous with another coverage cell defined by the same antenna beam associated with the same dual offset cassegrain antenna.
		Once the antenna beams occur in the predetermined locations with the desired beam characteristics, the locations of the phase centers of feeds and the pointing angle of the feeds which is used to manufacture the resulting antenna are output from the ray tracing program.
	www.freepatentsonline.com /6424310.html (4913 words)

	High gain antenna systems for cellular use - Patent 5907816
		The antenna system may also include a beam port arranged for coupling sector beam signals received by the sector antenna, so that sector beam signals can be selectively provided at the first and second switch output ports in the same manner as the first antenna beam signals.
		There have thus been described receive antenna systems capable of enabling the reception of an acceptable form of user signal to be validated and a suitable high gain receive antenna beam coupled to a receiver for reception of stronger signals from the user.
		Antennas 111-114 may be of basically the same type as antenna 12 or antenna 20, modified to provide a single beam with 90 degree azimuth coverage.
	www.freepatentsonline.com /5907816.html (8195 words)

	antenna basics
		Technically, antenna impedance is the ratio at any given point in the antenna of voltage to current at that point.
		This is a a vertically polarised UHF Yagi antenna and it is orientated WSW or 225 degrees.
		Rather than being omnidirectional (as a whip antenna would be) the loop antenna responds to the cosine of the angle between its face and the direction of arrival of the electromagnetic wave.
	www.electronics-tutorials.com /antennas/antenna-basics.htm (2838 words)

	Galileo's High Gain Antenna FAQ
		The HGA and the probe are at opposite ends of the spacecraft, so the orbiter would have to turn rapidly head-over-heels to align the Probe and the antenna.
		In addition, the antenna was "hammered"--the antenna's deployment drive motors were pulsed on and off as close as feasible to the resonant frequency of the stuck ribs.
		Antenna tests show that there's a 1 decibel gain in X-band (high power) performance over the Low Gain Antenna (the LGA, or what is currently being used for communications).
	www2.jpl.nasa.gov /galileo/hgafaq.html (1713 words)

	FMBroadcastAntenna.com \| HIGH GAIN FM BROADCAST ANTENNA
		Antennas for the FM broadcast band have historically all been some variation of the dipole design.
		This is an especially valid point in the VHF spectrum where antenna gain is much easier to achieve then on lower frequencies.
		The Dominator® is a high gain vertically polarized 3/4 wave Coaxial J-pole.
	fmbroadcastantenna.com (1090 words)

	Galileo FAQ - Galileo's Antennas
		The antenna, which is made of gold-plated metal mesh, was stowed behind a sun shield at launch, in order to avoid heat damage from the sun while the spacecraft flew "inside" the earth's orbit.
		Finally, the relay antenna itself would need to be comparable in size to Galileo's original high gain antenna, which would add to the expense and complexity of a relay mission.
		In both antennas, the same amount of power is being transmitted, but the low-gain spreads that power out over a much larger area of the sky than does the high gain.
	www2.jpl.nasa.gov /galileo/faqhga.html (2161 words)

	Mars Exploration Rover Mission: The Mission
		The low-gain antenna sends and receives information in every direction; that is, it is "omni-directional." The antenna transmits radio waves at a low rate to the Deep Space Network (DSN) antennas on Earth.
		The radio waves to and from the rover are sent through the orbiters using UHF antennas, which are close-range antennas which are like walky-talkies compared to the long range of the low-gain and high-gain antennas.
		One UHF antenna is on the rover and one is on the petal of the lander to aid in gaining information during the critical landing event.
	marsrovers.jpl.nasa.gov /mission/spacecraft_rover_antennas.html (334 words)

	High-gain antenna - Wikipedia, the free encyclopedia
		The high-gain antenna (HGA) is an antenna with a focused, narrow radiowave beam width.
		This narrow beam width allows for more precise targeting of where you want the radio signal to go - also known as a directional antenna.
		Most commonly referred to during space missions, these antennas are also in use all over Earth, most successfully in flat, open areas where no mountains lie to disrupt radiowaves.
	en.wikipedia.org /wiki/High-gain_antenna (109 words)

	High Gain Yagi Antenna, High Gain Yagi Antenna & Manufactures.
		High Gain Yagi Antenna consists of 18 Yagi elements on 1.7 Mt. boom, corner reflector improves the gain of the antenna when the system works at threshold.
		High Gain Yagi Antenna with 18 elements and a corner reflector is made to provide the communications with Digital Microwave Radio system.
		The gain of a portable Yagi antenna depends on the volume of directors.
	www.pelindia.com /high-gain-yagi-antenna.htm (351 words)

	High gain antenna directional/omni-directional
		These are weather-proof directional 1.2GHz/2.4GHz/900MHz panel antennas with much wider beam width angle than directional Yagi antenna.
		The antenna focuses signal radiation/reception in one direction and will therefore improves signal transmission/reception.
		This is weather-proof 9dBi omni-directional antenna with mast mount.
	www.vfmstore.com /high-gain-antenna.htm (212 words)

	WiFi Antenna \| High Gain 802.11 Omni Wireless Antenna -
		It is the highest gain Omni antenna that we have found and the quality is very impressive.
		If you have a high speed internet connection at home and would like to be able to consistently use your laptop, then mount this antenna as high as possible and enjoy a strong signal from all around your yard and surrounding buildings.
		This high gain omni wireless antenna is also a great choice for anyone who wants to create a high speed point to multipoint wireless network.
	www.radiolabs.com /products/antennas/2.4gig/high-gain-wifi-antenna.php (398 words)

	Amazon.com: Linksys High Gain Antenna for SMA Connectors HGA7S: Electronics (Site not responding. Last check: 2007-11-02)
		This means you'll need either a high gain antenna or a better receive sensitivity rating on your wireless client.
		In the end, if the client has antennas configured to communicate well with the access point (a similar gain to output power ratio), you will generally increase the coverage area and ability to communicate in both speed and distance.
		I would recommend this antenna if you are having trouble with your wireless network in certain areas when you know you are close enough to the access point to get a decent signal.
	www.amazon.com /Linksys-High-Antenna-Connectors-HGA7S/dp/B0002F3E9M (1695 words)

	HGA-7000 Antenna (Site not responding. Last check: 2007-11-02)
		The Chelton HGA-7000 High Gain Antenna System consists of a number of standard and optional subsystem components.
		The HGA-7000 High Gain Antenna, DAU-7050 Diplexer/Low Noise Amplifier, and the BSU-7100 Beam Steering Unit form the standard system.
		They rely upon the aircraft navigation system for position, speed, and AHRS information to keep the antenna pointed at the satellite, The SATCOM system uses this information to generate antenna steering commands to the BSU-7100 Beam Steering Unit, which controls the HGA-7000 through a single lightweight coax.
	www.cheltonsatcom.com /sat/sat_hga_7000.asp (399 words)

	AIRLINK® High-gain Antenna System
		The HGAS is comprised of two antenna assemblies located on the aircraft exterior at nominally 45 degrees on either side of the aircraft, providing a coverage area of 360 degrees around, and 210 degrees above the aircraft.
		Dual phased-array antennas for lowest "look angle" (-15 degrees) provide the most reliable satellite acquisition available, even at high latitude.
		Exceedingly robust antenna construction with no delamination failures in its 10-year history.
	www.robins.ball.com /airlink_high.html (233 words)

	NexSens A49 High Gain Antenna \| Cellular Frequency
		This low-profile antenna is 4" tall and extremely rugged for commercial applications.
		These antennas provide 2dB gain in a dual band design providing tri-mode operation for cellular service covering multiple systems.
		This antenna has a power handling capacity of 250 watts.
	www.fondriest.com /products/nexsens_a49.htm (121 words)

	Amazon.com: Linksys High Gain Antenna Kit for TNC Connectors HGA7T: Electronics (Site not responding. Last check: 2007-11-02)
		Attach these high gain antennas to your Linksys Wireless Broadband Router or Access Point, and increase both the effective strength of the outgoing signals, and the receive sensitivity for incoming signals.
		This means that, when installed in a suitable location, the most significant reception gains will be seen with equipment that is on the same level as the router itself.
		In summary: If you purchased these antennas and they did not work or made the problem worse, you need to reconsider the type of installation (multi-floor, multi-wall, etc.), sources of interference, channel selection, blocking materials such as foil-clad insulation, as well as proper antenna selection.
	www.amazon.com /Linksys-High-Antenna-Connectors-HGA7T/dp/B0002F3G7M (1450 words)

	Length of High Gain Antenna visible for LOS - WiFi-Forum
		signal in the plane perpendicular to the antenna, higher gain.
		Commercial antennas may also be fabricated from a circuit board as in:
		directional antennas, with less gain and a wider beam width.
	www.wifi-forum.com /wf/showthread.php?t=3796 (1682 words)

	Ulysses - Spacecraft Antennae (Site not responding. Last check: 2007-11-02)
		The LGA/R is similar to the Low Gain Antenna (Forward) but is mounted on the opposite side of the spacecraft protruding from the -X wing.
		It was used to provide S-band uplink and downlink during phases of the early mission when both the HGA and the LGA/F were pointed away from the Earth, after deployment from the Shuttle and before the initial Earth Acquisition Manoeuvres.
		The LGA/R is no longer routinely used; however it could be used as a backup receive antenna in the highly unlikely event that uplink was not possible via HGA or LGA/F. A major depointing at exteme distances, or malfunction of the Radio Frequency Distribution Unit could conceivably cause this.
	ulysses-ops.jpl.esa.int /ulsfct/spacecraft/hga.html (253 words)

	Voyager - Spacecraft - Instruments - High Gain Antenna
		The HGA transmits data to Earth on two frequency channels (the downlink).
		The X-band downlink science data rates are as high as 7.2 kilobits per second.
		The other channel, around 2.3 gigahertz, is in the S-band, and contains only engineering data on the health and state of the spacecraft at the low rate of 40 bits per second.
	voyager.jpl.nasa.gov /spacecraft/instruments_hga.html (116 words)

	What are high and low gain? (Site not responding. Last check: 2007-11-02)
		Dish-shaped high-gain antennas (HGAs) are the spacecraft antennas principally used for communications with Earth.
		The amount of gain achieved by an antenna refers to the amount of incoming radio power it can collect and focus into the spacecraft's receiver.
		However, the higher the gain, the more highly directional it is. When using an HGA, it must be pointed to within a fraction of a degree of Earth for communications to work.
	www.qrg.northwestern.edu /projects/vss/docs/Communications/2-what-are-high-and-low-gain.html (276 words)

	High gain antenna on 2 antenna router - Cyber Tech Help Support Forums
		The router has 2 antenna jacks, but the antenna only has one connector.
		The 12db gain antenna's are nice, but the problem is they only extend the signal one way.
		I call the manufacturer of the antenna thinking I had a bad antenna, however they told me that I'm not really doing any good boosting one way.
	www.cybertechhelp.com /forums/showthread.php?t=52131 (625 words)

	Chelton Satcom (Site not responding. Last check: 2007-11-02)
		The Chelton HGA-8000 High Gain Antenna has been designed for easy installation onto the hatch cover of transport aircraft as well as helicopters.
		The smallest and lightest fuselage mountable Inmarsat Aero H/H+/Swift64 antenna.
		The HGA-6000 is a High Gain Antenna specifically designed for mounting under the tail radome of business jets and airliners.
	www.cheltonsatcom.com /sat/sat_home.asp (213 words)

	FMBroadcastAntenna.com \| HIGH GAIN FM BROADCAST ANTENNA
		Norwalk Electronics is proud to introduce the latest model of the Dominator® FM broadcast antenna.
		The standard model is available with a gold pin Teflon insulated weatherproof N or SO-239 connector recommended for up to 1 KW.
		Be prepared for the unexpected as recent changes in weather patterns have forced some stations into the awkward position of having to reach their listeners after the loss of the transmitter antenna and or tower.
	lpfmantenna.com (1013 words)

	High gain antenna for 2.4GHz receiver and transmitter. (Site not responding. Last check: 2007-11-02)
		High gain antenna for 2.4GHz receiver and transmitter.
		(1) If the cable between the antenna and the transmitter (or the receiver) is not long enough, extension cable may be used.
		The antenna extension cable should be kept as short as possible.
	www.vfmstore.com /antyg2413.htm (134 words)

	Spaceflight Now \| Destination Mars \| Spirit's high-gain antenna successfully deployed
		In another major milestone, the Spirit Mars rover's high-gain antenna was successfully deployed Sunday night and aimed at Earth.
		EST today, the first direct-to-Earth communications session over the high-data-rate antenna began, prompting a now-familiar round of cheers and applause in mission control at the Jet Propulsion Laboratory in Pasadena, Calif.
		The X-band antenna is critical for Spirit's mission.
	www.spaceflightnow.com /mars/mera/040104sol2.html (509 words)

	CP24-12 2.4GHz Circular Polarized High Gain Antenna
		The Circular Polarized (CP) Antenna systems offered by Pacific Wireless are constructed of an aluminum alloy backplate with UV protected plastic radome.
		The antenna is right hand circular polarized (RHCP) to communicate with a wide variety of popular circularly polarized base station antennas available on the market.
		Because of the antenna’s high gain, it is also useful as a point to point antenna.
	www.pacwireless.com /products/CP24-12.shtml (150 words)

	Dot Micro high gain antenna - SIRIUS Backstage Forum (Site not responding. Last check: 2007-11-02)
		If you are comparing antennas, a couple of things to keep in mind is comparing them at the same time of the day, on the same roads or location(s).
		The antenna was not recoverable because of the way I had it installed coupled with the damage to the car.
		I was able to bend the pieces inward on my older square antenna, but the design of this antenna doesn't (easily) allow for that -- so I get a lot more dropout than I used to after 'fixing' the older antenna issue.
	www.siriusbackstage.com /forum/showthread.php?t=84233 (608 words)

	D-Link Expands Successful High Gain Antenna Product Line With The Introduction Of Two New Products
		The D-Link high gain antennas are used with select D-Link 802.11g and 802.11b products to instantly expand the range of a home or small business wireless network.
		The ANT24-0400 Omni-Directional Indoor Antenna also includes a sturdy stand for placement on flat surfaces and can be mounted on a wall.
		The DWL-M60AT Directional Indoor Antenna includes a sturdy stand for placement on flat surfaces and can be mounted on a wall using the included kit.
	www.dlink.com /press/pr/?prid=159 (577 words)

	Linksys High Gain Antenna HGA7S ( HGA7S ) - Networking - Canada
		Attach this high gain antenna to your Linksys wireless networking device, and increase both the effective strength of the outgoing signals, and the receive sensitivity for incoming signals.
		To install, just unscrew your current antenna, and attach the High Gain antenna in its place.
		The Linksys High Gain Antenna saves wiring costs and helps to build corporate wireless infrastructure by driving stronger signals into distant corners and hard-to-reach areas.
	www.directdial.com /ca/shop/item/HGA7S.html (315 words)

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