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Topic: Radio frequency induction


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 Antenna (radio) - Wikipedia, the free encyclopedia
The polarization of an antenna or orientation of the radio wave is determined by the electric field or E-plane.
At such frequencies, signals are reflected very effectively by the ionosphere; however, at these frequencies there are many forms of natural radio noise, including the noise produced by lightning.
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.
en.wikipedia.org /wiki/Antenna_(radio)   (2853 words)

  
 Low Frequency Induction   (Site not responding. Last check: 2007-10-21)
Radio at this sort of frequency (500kHz and above) is quite effectively absorbed by solid rock, so is not particularly suitable for communication between a cave and the surface.
Frequencies suitable for cave radio tend to be in the range 30kHz to 200kHz, although for data transmissions and radio-location, even lower frequencies can be used.
LF induction radio is also used for radio-location in cave surveying.
www.sat.dundee.ac.uk /~arb/creg/lfind1.html   (424 words)

  
 Frequency induction switch   (Site not responding. Last check: 2007-10-21)
This circuit is the circuit which makes the output the high level condition when the signal of the specific frequency which is is inputted.
Because the frequency of the time signal in the broadcasting station in Japan is 880 Hz, this is made to be able to be adjusted near it.
The signal is output from selector only when the frequency of the pulse signal is between the upper limit gate and the lower limit gate.
www.interq.or.jp /japan/se-inoue/e_ckt9.htm   (273 words)

  
 Antenna (radio) - Wikipedia, the free encyclopedia   (Site not responding. Last check: 2007-10-21)
By adding additional conducting rods or coils (called elements) and varying their length, spacing, and orientation, an antenna with specific desired properties can be created, such as a Yagi antenna.
The most comonly known type of wide band aerial is the logarithmic or log aerial but its gain is usually much lower than that of a specific or narower band aerial.
The Beverage antenna is a form of directional which uses a resistive termination at one end and feed from the other.
www.bonneylake.us /project/wikipedia/index.php/Antenna_(electronics)   (2593 words)

  
 Antenna (electronics)
Antennas have practical use for the transmission and reception of radio frequency signals (radio, TV, etc.) which can pass through (nonconducting) walls at the speed of light over great distances.
At such frequencies, signals are reflected very effectively by the ionosphere; however, at these frequencies there are many forms of natural radio noise, inclding the noise produced by lightning.
The helical antenna is a directional antenna suited for receiving singals that are either circular polarized or randomly polarized.
www.brainyencyclopedia.com /encyclopedia/a/an/antenna__electronics_.html   (2214 words)

  
 High Frequency Induction Heating   (Site not responding. Last check: 2007-10-21)
Induction heating can be used for any application where we want to heat an electrically conductive material in a clean, efficient and controlled manner.
An induction work coil is located close to the getter on the outside of the vacuum tube and the AC source is turned on.
As the operating frequency of the inverter is moved away from the resonant frquency of the tank circuit, there is less resonant rise in the tank circuit, and the current in the work coil diminishes.
www.richieburnett.co.uk /indheat.html   (4375 words)

  
 Radio frequency induction -- Facts, Info, and Encyclopedia article   (Site not responding. Last check: 2007-10-21)
Radio frequency induction -- Facts, Info, and Encyclopedia article
It is a special case of (Click link for more info and facts about electromagnetic induction) electromagnetic induction.
The (Click link for more info and facts about skull crucible) skull crucible, a specialized device for growing (Click link for more info and facts about cubic zirconia) cubic zirconia crystals, uses this effect.
www.absoluteastronomy.com /encyclopedia/r/ra/radio_frequency_induction.htm   (82 words)

  
 [No title]
One function of the radio frequency induction gaps is to control the length of the electron beam.
The induction gaps control the beam by means of electric current, created by running voltage through resistors.
Each time the beam passes through an induction gap, it will be accelerated slightly as a whole, but a lesser accelerating force will be applied to the head than to the tail, so that the beam length remains contained.
www.ipr.umd.edu /ebte/ring/ringdesign/induction-section.html   (571 words)

  
 RF Radio Frequency Induction Power Supplies - Radyne!
These standard solid state Flexitune induction power supplies incorporate advanced IGBT technology with 100% duty cycle and operate over a frequency range of 20 to 60kHz and will not fail in either a short circuit or open circuit condition.
These standard solid state induction generators are portable, weighing only 53 pounds, and operate at efficiencies of up to 90 percent.
A built-in water to water heat exchanger is used to cool the totally enclosed distilled water system for efficient cooling of the oscillator tube and generator components.
www.radyne.com /rfversa.htm   (350 words)

  
 Induction (disambiguation) - Open Encyclopedia   (Site not responding. Last check: 2007-10-21)
Transfinite induction is a special case of the above
Structural induction is a generalization of mathematical induction
This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title.
open-encyclopedia.com /Inductive_reasoning   (93 words)

  
 Method of coating a polycarbonate substrate with glass - Patent 4190681
After the polycarbonate substrate has been primed by the application thereon of the intermediate primer coating composition and the cure of said coating composition by exposure to ultraviolet light, a thin layer of glass is vapor deposited onto said primed substrate using radio frequency induction heating to evaporate the glass.
A polycarbonate test panel prepared substantially in accordance with Example 1 is placed into a vacuum deposition chamber containing a crucible about which is disposed a radio frequency induction coil, said coil being connected to a power supply source.
A polycarbonate test panel prepared substantially in accordance with Example 1 and precoated substantially in accordance with Example 3 is placed into a vacuum deposition chamber containing a crucible about which is disposed a radio frequency induction coil, said coil being connected to a Pachydyne.RTM.
www.freepatentsonline.com /4190681.html   (4391 words)

  
 Peak Induction   (Site not responding. Last check: 2007-10-21)
Specialising in Inverters for Induction Melting furnaces, Forging and Billet Furnaces, Induction heating.
Peak Induction specialise in static inverters for use in ferrous and non-ferrous induction melting furnaces, forging and billet heating furnaces and applications.
When you need a service engineer Peak Induction is an independent and well established company that has spent many years specialising in providing the best quality service, repairs, diagnostics and consultant advice to the Foundry, Melting and Metal Product industries in the UK, Europe and worldwide.
www.peakinduction.com   (291 words)

  
 The Dutch Way   (Site not responding. Last check: 2007-10-21)
All tubes are first spliced to the manifold (the mercury traps hold the mercury outside the oven chamber), then evacuated by a turbomolecular pump to less than 0.1 microns and checked for leaks.
A huge radio-frequency generator (not shown) feeds the radio frequency to the water-cooled solenoid at the end of the handle (Fig.
RF from a stationary generator is fed to the water-cooled solenoid; the electrodes glow bright orange.
www.signweb.com /neon/cont/thedutchwayc.htm   (588 words)

  
 'Induction melting' related links at LinkHighWay.com   (Site not responding. Last check: 2007-10-21)
Induction melting is an effective, practical means of converting energy to Australia's most powerful medium frequency induction melting furnaces
The large Inductotherm coreless induction furnace has a melting capacity of by means of induction melting and casting under controlled atmosphere..
Alloys can be produced by arc or induction melting under vacuum or controlled atmosphere, or by powder metallurgy techniques.
linkhighway.com /?q=induction-melting   (809 words)

  
 Induction (disambiguation) - LearnThis.Info Enclyclopedia   (Site not responding. Last check: 2007-10-21)
The term induction has more than one meaning in the English language.
Electromagnetic induction in physics and engineering (see also: radio frequency induction, Sunyaev-Zeldovich effect)
This is a disambiguation page; that is, one that points to other pages that might otherwise have the same name.
encyclopedia.learnthis.info /i/in/induction__disambiguation_.html   (108 words)

  
 Radio Frequency Welding Technique   (Site not responding. Last check: 2007-10-21)
Radio Frequency welding, sometimes known as Dielectric (Capacitance) welding or High Frequency (HF) welding, is the process of fusing materials together by applying radio frequency energy to the area to be joined.
Unlike induction heating (ie preheated bars melting workpieces together), in which nonuniform heating may occur, dielectric heating makes it possible to heat an object evenly throughout thereby making a uniform weld.
RF welding relies on certain properties of the material in the parts being welded, namely, their geometry and dipole moment, to cause the generation of heat in a rapidly alternating electromagnetic field.
www.appf.com /aboutRF.htm   (477 words)

  
 Spread Spectrum Scene Glossary -- Definitions of words, acronyms, jargon and buzzwords for the Wireless, Spread ...
The radio communications between a mobile handset and the base station.
Operates in the 800 MHz frequency band and uses FDMA technology.
A radio communications service that licensed operators with no pecuniary interest use for self-training, communications, and technical investigations.
www.sss-mag.com /glossary   (1280 words)

  
 PressRelease: Ameritherm acquires CIH
This acquisition brings together the top high frequency induction engineering and application expertise in the industry.
Ameritherm has been a leader in the development, manufacture and application of RF induction heating equipment for a wide range of industrial and research applications since 1986.
During Cheltenham Induction Heating’s forty-year history, the company has become known for specializing in the design and manufacture of high and medium frequency induction heating equipment and all associated handling equipment.
www.ameritherm.com /PR_CIHJan005.html   (484 words)

  
 Plastic and Composites Joining Technology Center   (Site not responding. Last check: 2007-10-21)
PCJT studies all joining processes including numerous welding processes-ultrasonic, vibration, spin, hot plate, hot gas, stacking, induction, radio frequency, microwave, infrared welding, and laser welding as well as adhesive bonding and mechanical fastening.
PCJT evaluated rapid curing methods using ultrasonic, radio frequency, and microwave to reduce the curing time and manufacturing cost.
PCJT demonstrated the use of conducting polyaniline in joining non-polar material using radio frequency energy.
www.kmutt.ac.th /we/pcjtpage/current1.htm   (387 words)

  
 Mathematical Modeling of Thermal Plasmas, Prof. John McKelliget   (Site not responding. Last check: 2007-10-21)
As well as modeling the plasma itself it is also necessary to account for it's interaction with the system being processed, which may take the form of powder or gas phases dispersed within the plasma or as a workpiece upon which the plasma impinges.
In the RF induction plasma a radio frequency coil external to the plasma region is used to produce an oscillating magnetic field inside the plasma.
In a series of projects sponsored by G.T.E. Laboratories, Waltham, Massachusetts, the partial differential equations of heat transfer, fluid flow and electromagnetism in the induction plasma were solved using the SIMPLER control volume finite difference algorithm.
jmckelliget.caeds.eng.uml.edu /plasma.htm   (1100 words)

  
 Delv.co.uk: radio frequency systems websites in the UK   (Site not responding. Last check: 2007-10-21)
The Thermage procedure is the only clinically proven, non-invasive, no-downtime treatment that delivers tighter skin, renewed facial contours and healthier collagen using radio frequency.
Find radio frequency systems and more at Lycos Search.
Read about radio frequency systems in the free online encyclopedia and dictionary.
www.insuranceclaims.net /claims/radio_frequency_systems.html   (333 words)

  
 Handbook of Plastic Joining   (Site not responding. Last check: 2007-10-21)
The joining methods discussed include: heated tool, hot gas, vibration, spin, ultrasonic, induction, radio frequency, microwave, resistance, extrusion, electrofusion, infrared, and laser welding techniques, mechanical fastening and chemical bonding.
Considering that most of the plastics must be processed by one of these methods to produce the final goods, this book is needed for all who work in polymer industry, regardless of the focus of their activities.
Production of a good final product requires concerted effort of polymer research chemist, plastic designer and compounder, part designer, manufacturing engineers and they all will benefit from frequent consulting this comprehensive resource.
www.chemtec.org /books/pdl/pdl2.html   (469 words)

  
 Vacuum Induction Furnace - Physics Machine Shop - University of Washington
The shop is equipped with a controlled atmosphere 15,000 Watt Vacuum Induction Furnace which utilizes radio frequency induction heating for brazing and soldering applications.
The Vacuum Induction Furnace operates in a hydrogen-argon atmosphere from atmospheric pressure to 1E-6 mm Hg.
The Vacuum Induction Furnace is equipped with multiple electrical feedthroughs for various instrumentation needs.
depts.washington.edu /shopweb/machine_shop/vacuum_ind.htm   (124 words)

  
 Induction (disambiguation)   (Site not responding. Last check: 2007-10-21)
1995); (3) analyze news wires and transcripts of radio...
This conversion process will appeal to a dictionary, which maps words (such as canyon) onto concepts (such as canyon) and to a world model that contains facts...
This is a disambiguation page - a navigational aid that lists other pages which might otherwise share the same title.
hallencyclopedia.com /Induction_(disambiguation)   (267 words)

  
 Radio Shack Antenna   (Site not responding. Last check: 2007-10-21)
But I noted in passing that the discussion of radio antenna focuses pretty much entirely on low-medium-high frequency resonant wire antennae.
It seems to me that some additional material on the isomorphy between lenses, reflecting antenna and wire antenna might be appropriate as well as some mention of non-resonant travelling wave antennae like the Beverage and resonant magnetic field antennae like the ubiquitous medium wave tuned loop.
We mean well but we all have to work together and sometimes toes get trodden on accidentally.
www.blownspeakers.com /pages3/73/radio-shack-antenna.html   (1058 words)

  
 Curriculum Vitae
Induction heating equipment and processes at all frequencies.
President and founder of Cycle-Dyne Inc., manufacturers of tube type radio frequency induction heating equipment, sold to General Signal Corp.
Lead Author, "Elements of Induction Heating", published by the American Society for Materials under contract to Battelle Laboratories, funded by the Electric Power Research Institute.
www.inductionconsultant.com /stanleyzinn/cv.html   (374 words)

  
 Index of Ameritherm Press Releases
In this role he is responsible for all Application development services in Ameritherm facilities in the Americas, Europe and Japan.
Ameritherm Inc., a leader in 100% solid state radio-frequency (RF) induction heating, improves the more powerful 3.5 kW, 5 kW and 7.5 kW versions of its popular HOTSHOT™ RF power supplies.
Ameritherm Inc., a leader in radio frequency induction heating equipment, announced today that it has acquired substantially all the assets of Cheltenham Induction Heating Ltd. (CIH) of Cheltenham, Gloucestershire, England.
www.ameritherm.com /whatsnew.html   (361 words)

  
 RF/Induction and Dielectric Power Tubes - High Frequency Heating
Whether you are brazing precision parts or hardening gear teeth, tube-based induction heating systems are your lifeline to efficient production.
Keep all of your induction heating systems in top condition by utilizing Richardson Electronics for all of your replacement component needs.
Richardson Electronics offers a full line of original and replacement components for the induction heat treating industry.
industrial.rell.com /rfi_marketHFH.asp   (151 words)

  
 Laboratory Services, Glassware, Heat Sealing, Radio Frequency (RF) Induction - US (United States)
Tyco Electronics, a business segment of Tyco International Ltd., is the world's largest passive electronic components manufacturer; a world leader in cutting-edge wireless, active fiber optic and complete power systems technologies: and a provider of premise wiring components and systems.
Induction heating applications database and equipment selection guide for brazing, curing, soldering, induction heat treating, melting, bonding, heat staking
Labdollars.com is an international provider of new, used and surplus laboratory equipment, supplies, and chemicals to the industrial, pharmaceutical, academic, clinical, government, and private research industries.
www.kellysearch.com /us-product-53992.html   (353 words)

  
 Radio Frequency Company, Inc., industrial RF processing systems for rapid heating and drying of materials
Radio Frequency Company, Inc., industrial RF processing systems for rapid heating and drying of materials
RFC induction heating equipment or Thermall™ plastics preheaters
Macrowave™ is a registered trademark of Radio Frequency Co., Inc.
www.radiofrequency.com   (114 words)

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