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Topic: Parabolic dish

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	Parabolic reflector - Wikipedia, the free encyclopedia
		A parabolic reflector (also known as a parabolic dish or a parabolic mirror) is a reflective device formed in the shape of a paraboloid of revolution.
		The parabolic reflector functions due to the geometric properties of the paraboloid shape: if the angle of incidence to the inner surface of the collector equals the angle of reflection, then any incoming ray that is parallel to the axis of the dish will be reflected to a central point, or "focus".
		The Olympic Flame is lit using a parabolic reflector concentrating sunlight.
	en.wikipedia.org /wiki/Parabolic_reflector (287 words)

	2440-36 - 2.4 GHz, 24 dBi, 36" Parabolic Dish Wireless LAN Antenna
		Parabolic Dish Antenna is a parabolic dish designed for the band of frequencies from 2400 to 2483 MHz.
		This dish antenna is designed to be used as a bridge antenna between two networks or for point-to-point communications.
		Parabolic dish antenna consists of an aluminum parabolic reflector and feed antenna.
	www.inpath.com /2424ghz24dbi.html (132 words)

	Parabolic Dish Antennas
		The parabolic dish antenna is also a great CPE unit for customers who are a greater distance from an access point.
		Parabolic dish antennas are designed to be used as a bridge antenna between two networks or for point-to-point communications.
		Parabolic dish antennas are provided with hardware for mast mounting and are available in either vertical or horizontal polarization.
	www.wlanantennas.com /parobolic_antennas.htm (200 words)

	2440-24 - 2.4 GHz, 20 dBi, 24" Parabolic Dish Wireless LAN Antenna
		Parabolic Dish Antenna is a 20 dBi solid parabolic dish designed for the band of frequencies from 2400 to 2483 MHz.
		Parabolic Antenna is designed to be used as a bridge antenna between two networks or for point-to-point communications.
		Parabolic Dish wireless antenna features a rugged mount which offers 20 degree fine adjustment for both horizontal and vertical planes.
	www.inpath.com /2424ghz20dbi.html (119 words)

	美国专利申请公开说明书 20040027309 - Preloaded parabolic dish antenna and the method of making it (Site not responding. Last check: 2007-11-06)
		The back-up structure of a parabolic dish antenna, which supports its reflecting surface, is formed in this invention by preloading its radial and circumferentially placed straight structural members and hence it is termed as preloaded parabolic dish antenna.
		The method of constructing the preloaded parabolic dish and attaching reflector panels of lightweight is also disclosed.
		The preloaded parabolic dish antennas are useful in microwave communication, satellite communication, radar, radio telescope and other similar applications for receiving and/or transmitting radio waves.
	cxp.paterra.com /uspregrant20040027309cn.html (233 words)

	Parabolic Antenna Microwave Products - Parabolic Dish Antennas
		The parabolic microwave antenna is carefully sealed with a radome of outdoor quality plastic and is terminated with an SMA (female) connector (inside the equipment housing).
		The parabolic antenna construction of this microwave antenna series is completely assembled with housing for electronic equipment.
		The parabolic dish antenna is carefully sealed with a radome of outdoor quality plastic and is terminated with a coaxial/waveguide transition with SMA (female) connector (inside the equipment housing).
	www.procom-dk.com /antenna/a0801-parabolic-antennas (468 words)

	Classical Guitar Construction (Site not responding. Last check: 2007-11-06)
		Parabolic dish to do-Now that the solera is leveled, the dish that creates the doming of the guitar must be created.
		At the inter section of the bridge saddle, to be determined by the fret scale) and the centerline of the guitar body drive a 4 penny nail 1/2 or more inches deep marking the location for the next steps.
		Sand lightly and draw the layout of all braces on the solera,cut out the area of the sound hole and on the oppisite side of the sound hole area make the solera thinner to allow small clamps to be used to clamp the top through the soundhole of the solera.
	my.execpc.com /~nostberg/chapter3/step4.htm (358 words)

	Parabolic reflector : Parabolic dish (Site not responding. Last check: 2007-11-06)
		A parabolic reflector or parabolic dish is a reflective device formed in the shape of a paraboloid of revolution.
		The most common applications of the parabolic reflector are in satellite dishes, telescopes, parabolic microphones and many lighting devices such as spotlights[?].
		It uses material from the wikipedia article Parabolic reflector : Parabolic dish.
	www.eurofreehost.com /pa/Parabolic_dish.html (251 words)

	sound adsorbing material to coat the back of a parabolic dish (Site not responding. Last check: 2007-11-06)
		The dish is only a valid directional implement at wavelenghs shorter than its diameter - way oversimplified explained.
		I am not convinced that sound reaching the back of the dish is your problem, but then I am not experienced with the use of such dishes.
		I have a Dan Gibson parabolic microphone that I use for recording nature sounds It works great except for road noise from distant passing cars, even with the dish pointed away from the road noise.
	www.thehelparchive.com /new-1458013-289.html (1333 words)

	Parabolic Templat (Site not responding. Last check: 2007-11-06)
		The gain computations for various sizes of the dish are also provided as well as rough graphs showing beam width and gain/frequency.
		Focal length varies with the size of the dish (but proportionally) therefore the focal point is also shown on the drawings.
		Positioning of the feed point (focal point) is the most critical aspect of a deep dish parabolic.
	www.freeantennas.com /projects/template (1359 words)

	2440-24 - 2.4 GHz, 20 dBi, 24" Parabolic Dish Antenna for your 802.11b/g Wireless LAN
		Specialist in wireless antennas including yagi antennas, indoor antennas, dish antennas, omni-directional antennas, sector, and patch wireless antennas for 2.4 GHz and 5.8 GHz">
		This dish antenna is provided with hardware for mast mounting.
		This 2440-24V dish antenna is equivalent to the Cisco AIR-ANT3338 Dish Antenna.
	www.wlanantennas.com /dish_antenna_2440-24.htm (164 words)

	Students redesign parabolic dish (Site not responding. Last check: 2007-11-06)
		A group of engineering students at Iowa State is refurbishing a university-owned parabolic dish for their senior design project.
		"The structure the dish is mounted to is a turret of a World War II naval gun," Gandrud said.
		He said the dish will eventually be available for use by the ISU astronomy department.
	seniord.ee.iastate.edu /SSOL/RT1/fs2.html (412 words)

	Parabolic Reflector (Dish) Antennas for SETI (Site not responding. Last check: 2007-11-06)
		Although numerous antenna options exist for amateur SETI stations, by far the most popular approach is to use a three- to five-meter (ten- to sixteen-foot) satellite TV dish, with a prime-focus feedhorn appropriate to the radioastronomy frequencies.
		Feedhorn options include the cylindrical waveguide hydrogen-line feed distributed by Jeffrey M. Lichtman at Radio Astronomy Supplies, as well as existing dish feeds for the 23 cm (1296 MHz) amateur band and the GOES series of 1691 MHz weather satellites.
		While 10 dB edge illimination of the dish is common for communications applications, radioastronomers usually prefer to under-illuminate their dishes, as a means of reducing antenna noise temperature and sidelobes.
	www.setileague.org /hardware/parabola.htm (517 words)

	Parabolic Sound Collecting Dish (Site not responding. Last check: 2007-11-06)
		I’m in grade five and my experiment is a parabolic sound collecting dish.
		The unique shape of the dish, which is a parabola, makes it possible to hear sounds that normally to far away to hear.
		What happens is the sound waves coming from whatever you point the dish at, bounce off the inside of the dish and into the focal point (microphone).
	schools.spsd.sk.ca /Lawso/GrassRoots/pechey/phillip.html (101 words)

	:::::::::: Welcome to Korea Institute of Energy Research :::::::::: (Site not responding. Last check: 2007-11-06)
		The study developed a parabolic dish type solar thermal concentrating system with a concentration ratio of 600 and a 11.7 m2 collector area.
		Also developed as part of the study were an automatic protection system that can protect the system up to a maximum wind velocity of 14 m/sec, and an artificial intelligence integrating control system.
		The demonstration model of the parabolic dish type solar thermal concentrating system has a concentration ratio of 600 and a thermal capacity of 5 kW.
	www.kier.re.kr /english/rnd/renew10.html (314 words)

	English Language Satellite TV Channels Throughout Europe, Sky Digital Satellite Equipment and Sky Viewing Cards, Sky ...
		Uplink satellite dishes are directed toward the satellite that its signals will be transmitted to, and are very large, as much as 9 to 12 meters (30 to 40 feet) in diameter.
		A new form of satellite antenna, which does not use a directed parabolic dish and can be used on a mobile platform such as a vehicle, was recently announced by the University of Waterloo.
		A satellite dish is a type of parabolic reflector antenna designed with the specific purpose of transmitting signals to and/or receiving from satellites.
	www.englishsattv.com (1500 words)

	radio astronomy -> Radio Telescopes on Encyclopedia.com 2002
		Radio waves emanating from celestial bodies are received by specially constructed antennas, called radio telescopes, whose use corresponds to that of the optical telescope in observing visible light.
		In the most common design, a parabolic “dish” replaces the mirror of the reflecting optical telescope.
		This dish serves to focus the radio waves into a concentrated signal that is then filtered, amplified, and finally analyzed using a computer.
	www.encyclopedia.com /html/section/radioast_RadioTelescopes.asp (461 words)

	Parabolic & dish antenna (Site not responding. Last check: 2007-11-06)
		Difference between this two antenna types is that parabolic antenna has metallic grid for reflector and dish has a solid reflector.
		This highly directional antenna type transmit/receives signals in a very narrow angle, so they are ideal for long distance and point to point network connections.
		Parabolic & dish antennas are the best choice because very narrow beamwidth will provide you:
	www.wifi-antenna.com /parabolic_dish (103 words)

	Low Distribution Price. 37 dBi 6' Parabolic Dish Directional Antenna, 5.2-5.8 GHz Frequency range (Site not responding. Last check: 2007-11-06)
		Standard microwave antennas consist of a parabolic shaped reflector spun from a sheet of aluminum.
		The parabolic shape focuses energy at the feed point of the antenna.
		These parabolic antennas have a narrow focused beam of energy and relatively high gain compared to many other types of antennas.
	www.winncom.com /moreinfo/item/WRSPD6-5.2/index.html (186 words)

	Parabolic Dish Antenna Calculator
		That section is our parabolic antenna dish in total.
		The antenna dish depth is the distance from the deepest point on the surface to the chord on a perpendicular.
		The focal ratio is the focal length (sphere radius) divided by the chord (dish diameter).
	johnscabin.com /light-switch/glossary/antennaparaboliccalc.html (167 words)

	5 -6 Ghz Parabolic Dish Antenna (Site not responding. Last check: 2007-11-06)
		This is a high-performance Compact Parabolic Dish Antenna that provides 31 d
		The dish is coated in a light gray UV-inhibited polymer for durability and aesthetics.
		The small diameter of the dish helps minimize wind loading.
	www.maksat.com /1dish.htm (92 words)

	Question Corner -- How To Build A Parabolic Dish
		While it is difficult to build a parabolic shape with a large amount of precision (in the absence of expensive machinery), there are a few tricks which allow anyone to build a crude parabolic dish.
		One method is to cut out a two dimensional parabolic shape from some rigid material and then use it to help you model some three dimensional shape (out of aluminum foil or chicken wire, for instance).
		The focus of the parabolic shape depends on the rate of the rotation and also on the density of the liquid (if you were using something other than water).
	www.math.toronto.edu /mathnet/questionCorner/parabolicdish.html (270 words)

	ClearDome SolaReflex 900/900X Parabolic Solar Cooker
		Little or no reflected energy is lost because of pot shadows, so combined with a superior small parabolic design, the 96% diffused reflectivity, and a sturdy anodized aluminum support base, it’s at least 15%-20% more efficient that perfect centered parabolic dishes.
		This parabolic cooker has such a high level of full spectrum solar reflectivity it will even heat food or water to temperatures above 150 degrees F on light overcast or partly cloudy days when there is little or no wind.
		Besides the finished assembled 900 parabolic dishes with the base supports, individual ABS 24" uncoated reflector blanks and SolaReflex coated 900 reflective dishes are available without support stands for hobbyists, students, scientists and developing nations that could assemble them on site to reduce labor costs.
	home.att.net /~cleardomesolar/parabolic.html (3041 words)

	Parabolic Dish Antenna Polarization
		The dish can be a skeleton type with wires and work almost as well as a solid metal but with much less wind loading.
		The definition is needed for estabilish a communication path; but this definition contain a little misleading, so require that people working at the TX and RX station be sinergic.
		Think a parabolic antenna with AZ-EL movement capability looking at the meridian position and observing a satellite.
	www.edaboard.com /ftopic93879.html (333 words)

	TalkToAliens.com Unveils E-Mail to Aliens -- The World's First Public Service for Sending E-Mails into Deep Space
		According to www.TalkToAliens.com, the system’s parabolic dish antenna is pointed into the area of space with the highest density of regional stars and, thus, hopefully towards planets and other civilizations.
		Our "intergalactic transmission system" is similar in concept to what is used to communicate with planetary probes: a transmitter feeding a large (10.5-foot-diameter) parabolic dish antenna.
		The system was designed by RF and broadcast engineers with over 75 years of combined experience in terrestrial and satellite communications.
	www.prweb.com /releases/2005/3/prwebxml220151.php (556 words)

	[No title]
		Gain of such quickee antenna typically 5-8dB,& a simple open mesh dish (bird netting etc) will usually be MUCH better.
		Such jests aside, parabolic reflectors uniquely have the property of a fixed focal point-unrelated to frequency.
		Kitchen sieves aren't usually very parabolic, but if spray painted fl both they & scoops look appealingly "invisible" indoors, & clamp versions conveniently grip shelves,desks, poles, office partition tops & even (PARKED!) car roof rails.
	www.usbwifi.orcon.net.nz (3156 words)

	Parabolic Dish Antennas
		dish antenna, parabolic antenna, parabolic dish antenna, bridge antenna, bridge wireless antenna, wireless dish antenna, dish antennas, parabolic antennas, parabolic dish antennas, bridge antennas, bridge wireless antennas, wireless dish antennas">
		2.4 GHz 20 dBi 24" Parabolic Dish Antenna
		2.4 GHz 22 dBi 30" Parabolic Dish Antenna
	www.directionalantennas.com /parobolic_antennas.htm (573 words)

	Epinions.com - Spincasting A Perfect Parabolic Dish
		I"m talking about making a parabolic dish.Lots of them.Why?Well,I've had enough of this 3 -ring circus,that"s why.
		Now,I"ve been thinking,if I rig up a bunch of smaller dishes to form a larger dish,plus some fiberoptic cable,and a ruby crystal,my previously satirical "death ray" just might,maybe,become a reality.
		I tested this rudimentary parabolic dish outside with the sun.The dish bounced the sun"s rays on to my finger in a nice little point{just like a magnifying glass}.I have a bandade on my finger right now.It works!
	www.epinions.com /content_3029573764 (282 words)

	Poynting - Parabolic Dish Assembly (Site not responding. Last check: 2007-11-06)
		The physical dimensions of a parabolic dish assembly are defined by the dish radius and focal length as shown in the dialog box below.
		The figure Shows a dialog box of a Parabolic dish.
		A typical numerical model of a Parabolic dish.
	www.poynting.net /assemblies/pardish.shtml (61 words)

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