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Topic: Antenna blind cone

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In the News (Mon 16 Nov 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	Blind Trust:
		Blind Trust is a publication of the non-profit organization RADAR (Radio Association Defending Airwave Rights, Inc.).
		In the first instance, the reading was caused by panning the radar antenna and in the second, the radar unit was measuring the fan motor in the patrol car.
		Because traffic radar is "direction blind," differences in reflectivity may cause instant-on readings to display the speed of a receding vehicle rather than of an approaching vehicle.
	www.ibiblio.org /rdu/a-btrust.html (2399 words)

	Antenna (electronics)
		An antenna in electronics (aerial in British English) is an arrangement of conductors designed to radiate an electromagnetic field in response to an applied alternating electromotive force (EMF) and the associated alternating electric current.
		Antennae have practical use for the transmission and reception of radio signals, which can pass through (nonconducting) walls at the speed of light over great distances.
		A dielectric resonator is a variation on the conventional antenna in which an insulator with a large dielectric constant is used to modify the electromagnetic field.
	www.ebroadcast.com.au /lookup/encyclopedia/ra/Radio_antenna.html (392 words)

	Antenna (radio) Summary
		Antennas are primarily designed for transmission of radio wave energy through free space or any space where the movement of energy in any direction is substantially unimpeded, such as interplanetary space (such as the interplanetary medium or interstellar medium), the atmosphere, the ocean (and other large bodies of water), or the Earth.
		The "polarization" of an antenna is the orientation of the electric field (E-plane) of the radio wave with respect to the Earth's surface and is determined by the physical structure of the antenna and by its orientation.
		The Phased array antenna is a group of independently fed active elements in which the relative phases of the respective signals feeding the elements are varied in such a way that the effective radiation pattern of the array is reinforced in a desired direction and suppressed in undesired directions.
	www.bookrags.com /Antenna_(radio) (6619 words)

	Antenna mount with rotary positionable feature - Patent 4538155
		An adjustable transceiver antenna mount in which the force required for adjustment is such as to facilitate one-hand operation, enabling the driver to adjust the antenna position from the driver's seat.
		In another version, where the antenna is mounted at the center of the roof, the operator while seated in the vehicle can reach out with one hand and by a remote control arrangement adjust the position of the antenna.
		The driver then turns the antenna 90 degrees from its upright position to its lowered position, at which time the driver allows the compression spring 75 to reseat the roll pin detents, but now back in the set of grooves 83 which are 90 degrees from the "upright" set.
	www.freepatentsonline.com /4538155.html (3974 words)

	Blind spot - Wikipedia, the free encyclopedia
		Blind spot (vision), also known as the physiological blind spot, the specific scotoma in the visual field that corresponds to the lack of light-detecting photoreceptor cells on the optic disc
		Blind spot (automobile), areas of the road that cannot be seen while looking forward or through either the rear-view or side mirrors in an automobile
		In the Known Space universe of Larry Niven, the Blind Spot is the name for the effect an unshielded view of hyperspace has on on the human optic nerve.
	en.wikipedia.org /wiki/Blind_spot (226 words)

	Internal thermal isolation layer for array antenna - Patent 5455594
		One of the most promising technologies for producing such systems for space-based communications is a phased array antenna which uses superconductors instead of normal metal for the network that distributes and controls the phase and amplitude of the signals to the radiating elements (the feed network).
		It is still another object of the invention to reduce the duration of blind spells caused by direct insolation from the sun, the moon, or the earth.
		The "area illuminated by the antenna" in the transmit mode is identical to the "area to which the antenna is sensitive" in the receive mode.
	www.freepatentsonline.com /5455594.html (6030 words)

	Definition: antenna blind cone (Site not responding. Last check: 2007-11-07)
		antenna blind cone: The volume of space, usually approximately conical with its vertex at the antenna, that cannot be scanned by an antenna because of limitations of the antenna radiation pattern and mount.
		Note: An example of an antenna blind cone is that of an air route surveillance radar (ARSR).
		As the antenna is rotated about a vertical axis, it can illuminate targets only if they are 70° or less from the horizontal plane.
	www.atis.org /tg2k/_antenna_blind_cone.html (147 words)

	How to Install Vertical Blinds (Site not responding. Last check: 2007-11-07)
		The hunter, an enigmatic character, is at once an outlaw hunter douglas blinds and a father figure to Henry.
		Antenna measurement techniques refers to the art of testing antennas to ensure that the antenna meets specifications.
		Antenna blind cone - In telecommunication, antenna blind cone (sometimes called a cone of silence) is the volume of space, usually approximately conical with its vertex at the antenna, that cannot be...
	windowtrim.vvvvvv3.com /howtoinstallverticalblinds.html (906 words)

	Definition: antenna blind cone (Site not responding. Last check: 2007-11-07)
		antenna blind cone: The volume of space, usually approximately conical with its vertex at the antenna, that cannot be scanned by an antenna because of limitations of the antenna radiation pattern and mount.
		Note: An example of an antenna blind cone is that of an air route surveillance radar (ARSR).
		As the antenna is rotated about a vertical axis, it can illuminate targets only if they are 70° or less from the horizontal plane.
	www.its.bldrdoc.gov /fs-1037/dir-003/_0310.htm (125 words)

	Rethinking the Process of Vision » Nano (Site not responding. Last check: 2007-11-07)
		In physics terms these antennas represent the interaction of light as the wave of classical physics with the absorbing mass - the electron - confined to what is termed the “quantum confinement” dimension (again in physics terms, the “electron-in-a-box” approximation).
		I propose that this is the function of the all-cone central fovea of the retina - to discern the basic “outline sketch” or at most the “general outline” of the visual image that we perceive.
		This implies, I guess, that the retina is composed of small “RGB triads of color sensitive cone receptors” - as on the faceplate of a television cathode ray tube or at least in three RGB layers as in color film - which is not at all evident on the retina.
	www.ghuth.com /vision/?cat=15 (7264 words)

	Class Definition for Class 342 - COMMUNICATIONS: DIRECTIVE RADIO WAVE SYSTEMS AND DEVICES (E.G., RADAR, RADIO ...
		Part of the antenna which is directly coupled to free space and radiates electromagnetic energy into, or collects electromagnetic energy from, free space and is also directly coupled to a transmitter or receiver.
		The long antenna is synthesized through the motion of a small antenna relative to the target with either the antenna or the target or both moving.
		The synthesized antenna length is given by the trajectory traversed by the small antenna relative to the target during the coherent integration time.
	www.uspto.gov /go/classification/uspc342/defs342.htm (3772 words)

	RAND HOME PAGE
		Before pursuing this issue, we contacted several antenna engineers (see the Updates section below), who told us that the power cable through the center of the antenna was a major problem (even when insulated), s ince it passes right through the center of the field pattern.
		That is, an antenna would receive the greatest signal when its axis of symmetry is lined up with the E field of incoming radiation.
		The concept is to have a double-feed cylindrical slotted antenna which behaves both as a standard dipole and as a slotted antenna.
	aether.lbl.gov /www/projects/neutrino/rand/rand.html (2017 words)

	DSN: Features: How a Real DSN Station Is Built
		A beam waveguide antenna is designed so that sensitive electronics are relocated from the traditional feed cone in the center of the dish to an equipment room in the pedestal.
		The signal from a spacecraft is received by means of five precision radio frequency mirrors that reflect radio signals along a beam waveguide tube from the vertex of the antenna to the below-ground pedestal equipment room.
		After the first layer of the concrete blind cures, a water barrier is installed before a second layer of concrete is poured.
	deepspace.jpl.nasa.gov /dsn/features/dsnbuilt1.html (313 words)

	Yenra Glossary A (Site not responding. Last check: 2007-11-07)
		antenna blind cone - The volume of space, usually approximately conical with its vertex at the antenna, that cannot be scanned by an antenna because of limitations of the antenna radiation pattern and mount.
		antenna gain - The ratio of the power required at the input of a loss-free reference antenna to the power supplied to the input of the given antenna to produce, in a given direction, the same field strength at the same distance.
		antenna gain-to-noise-temperature - In the characterization of antenna performance, a figure of merit, where G is the antenna gain in decibels at the receive frequency, and T is the equivalent noise temperature of the receiving system in kelvins.
	www.yenra.net /glossary/a.html (13780 words)

	Compare Prices and Read Reviews on Delphi SKYFi SA10001 at Epinions.com
		Between the speaker is a spring loaded mounting receptacle for the tuner (the boombox is useless without the tuner and XM subscription, which is sold separately).
		Though I typically keep my antenna in a west facing window ledge, I routinely move the radio and antenna around my home (in southern Louisiana), and find that it works anywhere in our home, and that being near is window is not important.
		The XM tuner does include a "antenna aiming" graphic to help you locate and position your antenna for the best reception, but I've not found the need to use this.
	www.epinions.com /content_140234886788 (1504 words)

	Antennas, Accessories & Cables at Home Theater Vibe
		More specifically, an antenna is an arrangement of conductors designed to radiate (transmit) an electromagnetic field in response to an applied alternating electromotive force (EMF) and the associated alternating electric current.
		There are two fundamental types of antennas, which, with reference to a specific three dimensional (usually horizontal or vertical) plane, are either omni-directional (radiate equally in the plane) or directional (radiates more in one direction than in the other).
		This is usually the physical length of the wire multiplied by the ratio of the speed of wave propagation in the wire.
	hometheatervibe.com /antennas_69.htm (726 words)

	Supra
		The antenna is taped to the boom with the last 4 inches hanging down.
		The balsa shims were placed under the blind nuts and on top of the ballast tube.
		The blind nuts were epoxied to the bottom of the fuse and the shims epoxied to the bottom of the blind nuts.
	www.hilaunch.com /Supra.htm (1420 words)

	Aboutantenna.info - The Best Antenna Resources and Information. This website is for sale! (Site not responding. Last check: 2007-11-07)
		Winegard TV Antennas TV Antennas for all video needs Easy to Install Low Prices www.summitsource.com
		Hawking Hi-Gain Antennas Extend Your Wireless Distance Indoor,Outddor, Cable and Connectors www.hawkingtech.com
		Reference to any specific service or trade mark is not controlled by Sedo or domain owner and does not constitute or imply its association, endorsement or recommendation.
	www.aboutantenna.info /vertexantenna (177 words)

	Dipole antenna (Site not responding. Last check: 2007-11-07)
		A simple half-wave dipole antenna that a shortwave listener might build
		A dipole antenna, invented by Heinrich Rudolph Hertz around 1886, is an antenna with a center-fed driven element for transmitting or receiving radio frequency energy.
		These antennas are the simplest practical antennas from a theoretical point of view.
	www.kiwipedia.com /en/dipole-antenna.html (72 words)

	Virginia Tech Antenna Group (VTAG)
		R. Allnut, T. Pratt, and A. Dissanayake', "A Study in Small Scale Antenna Diversity as a Means of Reducing Effects of Satellite Motion Induced Multipath Fading for Handheld Satellite Communications Systems," Proceedings of International Conference on Antennas and Propagation, vol.
		A. Safaai-Jazi, and J.C. Cardoso, "Radiation Characteristics of a Spherical Helical Antenna," IEE Proc.-Microw.
		Stanislav Licul and William A. Davis, “Unified Frequency and Time-Domain Antenna Modeling and Characterization”, IEEE Transactions on Antennas and Propagation, September 2005.
	antenna.ece.vt.edu /publications.html (5803 words)

	Antenna Guide
		The Dip Antenna Is Simply Two Wires Pointed In Opposite Directions Arranged Either Horizontally Or Vertically, With One End Of Each Wire Connected To The Radio And The Other End Hanging Free In Space
		The Endfire Helical Antenna Is A Directional Aerial Suited For Receiving Signals That Are Either Circular Polarized Or Randomly Polarized
		If An External Hdtv Antenna Is Not An Option, Perhaps Because You Live In An Apartment Or In A Building Of Historic Interest, Then You'll Have To Go For An Internal, Set-top Antenna
	antenna-guideto.com /sitemap.aspx (1579 words)

	Antenna Ring Wholesale (Site not responding. Last check: 2007-11-07)
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	antenna.vvvvvv3.com /antennaringwholesale.html (445 words)

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