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Topic: RF shielding

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	Panashield RF Shielding Systems
		The RF shielded room is constructed on an underlayment consisting of a polyethylene vapour barrier and 3 mm thick dielectric hardboard.
		Panaweld RF Shielded Rooms are constructed from 2 mm thick (thicker for special applications and high magnetic shielding effectiveness) hot rolled steel sheet on the walls and ceiling and 6 mm thick hot rolled plate for floors.
		Shielding effectiveness is dependent on the shielding medium and type of shielded doors used, but with care a 'mid range' level of RF shielding performance level can generally be achieved using architectural shielding.
	www.panashield.co.uk /pages2/rf_intro.htm (682 words)

	[No title]
		Each RF window wall section consists of a double layer of precisely aligned RF screen mesh components, sealed between layers of laminated safety glass and mounted in a special extruded frame for installation in the RF shielded wall.
		The frame electrically connects the RF shielding mesh in the window to the RF shielded enclosure itself.
		Attenuation levels are critical to RF shielding integrity.
	www.eretec.com /eretec/02_product/02_ets/ets02_01_04_rfw.asp?smenu=22&ovnum=105 (512 words)

	EMI Shielding RF Shielding - Glossary
		The filter also provides a shield to RF energy, which would otherwise leak in or out of an enclosure.
		The measurement is the ratio of the signal received without the shield to the signal received inside the shield.
		Shielding materials are always metals, metalized plastics (conductive coatings) or conductive composites.
	www.tech-etch.com /shield/glossary.html (1927 words)

	Architecture Design Handbook: Fundamentals: Radio Frequency Shielding
		Radio frequency (RF) shielding involves the construction of enclosures for the purpose of reducing the transmission of electric or magnetic fields from one space to another.
		Radio frequency shielding enclosures are used in these situations to reduce the levels of RF radiation that enters or leaves the enclosed space.
		RF shielding enclosures are usually designed to filter a range of frequencies under specified conditions.
	www.copper.org /applications/architecture/arch_dhb/fundamentals/radio_shielding.html (414 words)

	Portable radio housing with logic and RF shielding - Patent 4680676
		said first and second shields and said first and second circuit substrates each having a plurality of holes in alignment with said holes of said tabs, wherein fasteners are inserted to attach said first and second shields and said first and second substrates to said frame.
		For example, it would be desirable to use the shield as the structural foundation for the radio, to provide acoustic baffling for the radio speaker, and to utilize its mass to sink heat from various power modules in the radio.
		To provide for optimized reflective shielding, conductivity, and structural strength, front shield 176, middle shield 138, rear shield 164, and frame 102 are preferably constructed from tin plated CDA #770 nickel silver, although tin plated cold rolled steel may also be satisfactory.
	www.freepatentsonline.com /4680676.html (3929 words)

	ATEC Industries : RF Shielding
		RF attenuation requirements have varied in the magnetic and electric (HandE) fields from 50db at 1KHz to 100db at 100KHz to 100db at 50 MHz and microwave performance of 115db at 18 GHz to 80 db at 50GHz.
		Our engineering and project management teams enjoy decades of experience, not only in the intricacies of RF shielding, but also in the integration of the shielding into the parent facility and the coordination of the trades that are critical to this type of project.
		Interior self-supporting RF shield was 195’x180’x90’H and included a rolling RF Shielded Anechoic Door, 165’x75’H, which weighed over 400.000 lbs and was sealed by a series of pneumatic bladders with beryllium copper mating surfaces.
	www.atecindustries.com /rfshielding (411 words)

	RF shielding (Site not responding. Last check: )
		RF shielding is the protection of sensitive electrical equipment from external radiofrequency (RF) electromagnetic radiation by enclosing it in a conducting material.
		RF shielding is a refinement of the principle of the Faraday cage, which protects equipment from electric fields such as those from electrostatic discharge s.
		The enclosure may be made of an unbroken conducting sheet, like the metal box surrounding a sensitive radio receiver, or a wire mesh, like that in the door of a microwave oven.
	www.serebella.com /encyclopedia/article-RF_shielding.html (430 words)

	Universal Shielding \| RF Shielded Room, Solid Wall Rooms, Shielded Enclosures
		Universal Shielding Corp. (USC) was established in 1972 and during this time span has provided in excess of 20,000 pre-fabricated modular RF shielded enclosures to military, commercial and medical facilities.
		Universal Shielding Corp. is the second largest RF shielding manufacturer in the United States.
		Our RF air vents are mechanically held in place with all welded frames, thus enabling honeycomb vent to be easily removed for cleaning after long periods of usage.
	www.ramayes.com /RF_Shielded_Room.htm (846 words)

	Magnetic fields interference solved with electro magnetic shielding
		Magnetic Shield is aware that groups are attempting to develop a magnetically driven motor and has supplied shielding material which we believe has been used on such projects.
		With proper construction, magnetic shielding alloys have the ability to function as broadband shields, shielding both rf and magnetic interference fields.
		All shielding materials work by diverting the magnetic flux to themselves, so although the field from a magnet will be greatly reduced by a shield plate, the shield plate will itself be attracted to the magnet.
	www.magnetic-shield.com /faq/faq.html (1085 words)

	Frequently Asked Questions About RF Shielding
		In some cases, the RF is high enough to be considered a health hazard, in which case a RF shield would not only protect the equipment but also the people required to be at that location, as well.
		The shielding materials and components (a shielding system) must be installed in accordance with the procedures that are particular to the facility being shielded, the degree of shielding effectiveness to be achieved, the special materials being employed, and the environmental conditions in which the system will be operating.
		RF signals from those radios were strong enough to bring the cellular system to its knees when they overloaded the DC power system controllers.
	www.lbagroup.com /associates/lbaafaq.php (1011 words)

	rf rf modulator rf connector rf amplifier rf micro device rf module rf video rf switch rf modulators rf filter rf ...
		Radio Frequency (RF) communications is based on laws of physics that describe the behavior of electromagnetic energy waves.
		RF communication works by creating electromagnetic waves at a source and being able to pick up those electromagnetic waves at a particular destination.
		Line-of-site when speaking of RF means more than just being able to see the receiving antenna from the transmitting antenna.
	www.wirelessintegrated.com /wireless_technologies_knowledge_center.htm (889 words)

	GPS Specialty Doors Electromagnetic RF Systems
		Just as steel has replaced wood for studding, GPS pan rooms are the replacement for traditional modular enclosures, which are made of galvanized steel laminated to a wood core, GPS Pan Rooms use 100% galvanized steel and are lighter in weight with fewer parts.
		Specify Pan Rooms when: cost effective high performance shielding is required and expansion or contraction of wood threatens the shielding integrity of the enclosure joints.
		Shielding from 5 gauss to 10 milligauss or less.
	www.gps-door.com /id2.html (510 words)

	MULTI-PURPOSE CONTACT AND RF SHIELD
		This RF shielding is commonly pro- vided by a stamped piece of sheet metal or something similar and placed in-between the receiver and decoder board.
		The positioning of the receiver/decoder board and RF shield has not been critical due to the relatively large size ofthe typical selective call receiver.
		The wristwatch pager has similar RF shielding problems as a conventional selec- tive call receiver, however, the size constraints are differ- ent.
	www.priorartdatabase.com /IPCOM/000006710 (598 words)

	RF shielding elimination for linear array SAR radar systems - Patent 6888489
		This burden is enhanced by the circumstance that the associated maintenance required for such shielding frequently leads to the further effectuation of those same undesired characteristics.
		As such, the task of shielding the radar facilities and installations against radio frequency waves have always been arduous as both to time and cost.
		As a safety precaution, radio frequency room area RF hazard sensors may be optionally tied into a power cutoff circuit to the radar system 10 as a precaution for catastrophic waveguide failure, misalignment or other unforeseen failure causing radio frequency reentry into the radar compartment.
	www.freepatentsonline.com /6888489.html (4774 words)

	RF Shielding
		When a plasma or TIG welder is in operation and the arc is running, the RF energy is transmitted through the air and there is not much else you can do to shield this short of welding and plasma cutting inside a grounded metal box.
		You may not be able to suppress the RF energy that is radiating into the air directly from the arc, but you can help suppress all of the antennas that are connected to the arc.
		This basically means that the RF energy tends to travel along the outside area of the conductor as opposed to traveling through the entire conductor.
	www.randyray.com /TMC/rf_shielding.htm (2070 words)

	RF Shielding & EMI Shielding- Photofabrication Engineering Inc.
		RF Shielding & EMI Shielding- Photofabrication Engineering Inc.
		This shield incorporates an etched slot that is straight or staggered to minimize RF leakage.
		The tab connecting the lid to the RF shield can be easily snipped for access, then re-soldered in seconds, minimizing downtime.
	www.photofabrication.com /shielding.php (435 words)

	RF Shielding Manufacturers & Suppliers
		RF Shielding Products: Source for RF Shielding manufacturers at Global Sources.
		Find a supplier or manufacturer of RF Shielding from China, Taiwan and Worldwide.
		The featured China RF Shielding manufacturers and featured Taiwan RF Shielding manufacturers listed here are sourced by the Global Sources team of industry experts.
	www.globalsources.com /manufacturers/RF-Shielding.html (289 words)

	RF EMI Shield Capabilities and Products from Thermaflo
		Design requirements and size help determine whether to manufacture these RF shields through a stamping operation or by machining an extrusion.
		Placement of these notches in relation to other features is not critical, but if a relief notch is close to a tab, verify that the two features do not overlap.
		If components require adjustment after the RF shield installation, consider placing openings in the shield cover to facilitate this process.
	www.thermaflo.com /rfshields.shtml (306 words)

	EEProductCenter.com :: RFMD's self-shielding technology simplifies placement of RF components
		RF Micro Devices, Inc. has introduced a new self shielding technology for RF circuits.
		RFMD's self shielding technology is designed to eliminate the need for custom external shields by integrating RF shielding into the RFIC or module.
		This reduces the volume required for RF sections by approximately 30% to 50% and provides RF components that are not sensitive to board placement.
	www.eeproductcenter.com /rf-micro/brief/showArticle.jhtml?articleID=197005875 (204 words)

	Govt. & Industrial Shielding\| ETS-Lindgren (Site not responding. Last check: )
		The ETS-Lindgren™ Pneumatic Hinged Door (PHD) is a highly reliable RF sealing concept in shielded hinged leaf doors, and offers the most maintenance-free qualities of any competitive door today.
		The door is suitable for modular, welded, and pan-formed RF shielded enclosures, and is also ideal for anechoic chambers.
		The ETS-Lindgren Euroshield™ brand shielded rooms are of modular structure consisting of hot galvanized rigid steel panels which are bolted together by using a special gasket in the joints.
	www.ets-lindgren.com /page/?i=gov_industrialshielding (758 words)

	Shielding Fabric
		This method of shielding RF Radiation was discovered in early 1836, by Michael Faraday!
		Shield low intensity radio frequency and microwaves (with a shielding effectiveness up to 67 dB at 1 MHz and 33 dB at 1 GHz, actual results may vary depending on your shield design and other factors), and properly used its an excellent E-field shield.
		This space age shielding material is easily cut to fit your shielding needs.
	www.rfsafe.com /product_line/fabric/intro.htm (386 words)

	Magnetic Shielding – Magnetic Shielding Material – Magnetic Field Shielding (Site not responding. Last check: )
		Magnetic shielding and magnetic shielding material manufacturers including magnetic field shielding and magnetic RF shielding.
		Magnetic shielding is used to shield and protect equipment and instruments from magnetic fields.
		Magnetic shielding effectiveness measures the ability of a shield component to prevent the passage of electromagnetic radiation.
	www.iqsdirectory.com /magnetic-shielding (543 words)

	RF Shielding and PC Mods. - An Article by BakerStreet (Site not responding. Last check: )
		The reason given was that there was a required amount of RF shielding involved in making a PC case, and that omitting it was a serious violation of this or that federal regulation.
		Dec 22, 2005 5:12 AM I'm in the same boat as you are with case creation ideas, and have pestered enough electronic engineers about shielding in the past to tell you that the case isn't near as much worry as the components and cabling.
		None of them have good shielding, if any at all, because it is expensive, and may not be required to meet FCC requirements.
	www.wincustomize.com /articles.aspx?aid=94761&c=1 (2151 words)

	EETimes.com - Ambit licenses RF technology to NaturalNano
		The patent allows NaturalNano, a nanomaterials company, to offer an RF shielding solution utilizing its pre-loaded natural halloysite nanotubes technology combined with the ability to selectively turn on and off the impact of such shielding, said Michael Riedlinger, president of NaturalNano, in a statement.
		The use of metalized nanotubes for RF shielding came about as a result of a NaturalNano research and development program.
		NaturalNano's spray-on shielding formulation, when applied to the walls of a room, may provide a passive blocking agent for RF energy.
	www.eetimes.com /showArticle.jhtml?articleID=180200805 (332 words)

	Room, Area and Source Shielding for Field Reduction - FMS
		In many instances, shielding is the option of preference to reduce elevated EMF levels to mitigate equipment interference (EMI) or possible health concerns.
		Shielding choices can include shielding of either the source or the affected area or device.
		The shielding of AC magnetic fields is particularly challenging as they pass undiminished through earth, concrete, most conventional building materials including wood, drywall and even a thick layer of lead!
	www.fms-corp.com /fmsservices_shielding.php4 (504 words)

	2600 Games Darker on a 7800 System - AtariAge Forums
		I read on one of the posts on AtariAge.com that some of the earlier Atari 2600 built in 1978 had the thicker RF shielding to them too but I can't check to see if my Atari 2600 is on of the earlier 78' produced ones because its missing its manufacture sticker on the bottom.
		I think the metal shielding that goes around the motherboard is used for grounding proposes but I’m not an electronic expert.
		If I need a thicker RF shielding to get a brighter image when I play my games is there anything I can coat the RF shielding in to insulate it like covering it in fiberglass or does it have to be metal because of heat transfer reasons.
	www.atariage.com /forums/index.php?showtopic=70223 (748 words)

	DJM Shielding
		DJM SHIELDING is one of the largest manufacturers and distributors of RF shielding products, absorber material and shielding accessories in North America.
		Since 1978, we have built relationships with established leaders in the shielding industry in order to design, build and offer the most complete line of absorber and shielding products currently available.
		Although we cannot provide you with an education on shielding and creating a specification, if you know what you want and can provide us with a requirement, then we can help.
	www.djmshielding.com /index.html (219 words)

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