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   Shields, RF

Electromagnetic shielding is the process of limiting the flow of electromagnetic fields between two locations, by separating them with a barrier made of conductive material. Typically it is applied to enclosures, separating electrical devices from the 'outside world', and to cables, separating wires from the environment the cable runs through. Electromagnetic shielding used to block radiofrequency electromagnetic radiation is also known as RF shielding.

The shielding can reduce the coupling of radio waves, visible light, electromagnetic fields and electrostatic fields, though not static magnetic fields. (A conductive enclosure used to block electrostatic fields is also known as a Faraday cage.) The amount of reduction depends very much upon the material used, its thickness, and the frequency of the fields of interest.



Bronze Partners
3Gmetalworx Inc.
3M
Ad-Vance Magnetics, Inc.
Alpha-Core, Inc.
AME Corp.
Amuneal Manufacturing Corp.
Arrem Plastics, Inc.
Atlee Inc.
Ben Mer Manufacturing, Inc.
BMI, Inc.
BRIM Electronics Inc.
Chomerics, Division of Parker Hannifin
Compac Development Corp.
Conductive Technologies Inc.
Cutcraft, Inc.
Daburn Electronics & Cable Corp.
Dontech, Inc.
Eagle Magnetic Company, Inc.
EAI Enclosures, Inc.
El-Com/Cabletek
Equipto Electronics Corp.
Evaporated Coatings, Inc.
FerriShield, Inc.
Fujipoly America Corp.
Furon CHR
Hobart Tafa Technologies
Laird Technologies
Leader Tech
MAJR Products Corp.
Max Levy Autograph, Inc.
MBK Enterprises Inc
Metavac LLC
Metex Corporation
Metuchen Capacitors, Inc.
MMG
Omega Shielding Products, Inc.
PacTec
Parker Hannifin Corp.
Parker Hannifin Corp.
Plastic Distributors & Fabricators, Inc.
Rapid Conn Inc
Schlegel Systems, Inc.
Schurter, Inc.
Sealcon LLC
Select Fabricators Inc
Shielding Resources Group, Inc.
Spectrum Control, Inc.
Spira Manufacturing
Stevens Products, Inc.
Steward
Swift Textile Metalizing LLC
Tapecon, Inc.
Tapecon, Inc.
Tech-Etch, Inc.
Techprint Inc.
Tecknit Inc.
TFD Inc.
The Bergquist Company
Thermshield
Thrust Industries, Inc.
Vanguard Products Corporation
View Thru Technologies, Inc.
Zippertubing Company
Fix & Prog. Sinewave Oscillators - Frequency Devices

 

Books
Laser Soldering Applications for RF Shield Rework -- By using one-piece RF shields and lasers for rework, throughput can be increased while significantly ... An article from: Circuits Assembly
Edgar Cerda and Neil Watson

Optimizing Wireless/RF Circuits
John D. Lenk

Excerpt - page 50: "... feed-through bypass capacitors are used at higher frequencies where the RF circuits are physically shielded from the supply and other circuits. A feed-through capacitor permits direct current to be applied through a shield, but prevents RF from passing outside the shield (RF is ..."
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Secrets of RF Circuit Design
Joseph J. Carr

Excerpt - page 13: "... with the prices of the better-quality aluminum boxes that don't shield so well at RF frequencies. The small project in Fig. 1-10 is a small ..."
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Lumped Elements for RF and Microwave Circuits
I. J. Bahl

Excerpt - page 130: "... and S. S. Wang, "On-Chip Spiral Inductors with Patterned Ground Shields for Si-Based RF IC's," IEEEJ Solid-State Circuits, Vol. 33, May 1998, pp. 743-752. ..."
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High Data Rate Transmitter Circuits: RF CMOS Design and Techniques for Design Automation (The International Series in Engineering and Computer Science)
C.J. de Ranter and Michiel Steyaert

Excerpt - page 77: "... the substrate it is placed in a CuBe container that shields the chip from RF-interference during measurements. Part of this container can also he seen ..."
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Spread Spectrum CDMA : IS-95 and IS-2000 for RF Communications
Steve Lee

Excerpt - Back Matter: "... opposite and completely cancel out, leaving the interior of the shield box devoid of any RF field. In an ideal conductor in which the charges respond ..."
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Circuit Design for RF Transceivers
Domine Leenaerts, J. van der Tang, and Cicero S. Vaucher

Excerpt - page 72: "... These transistors have an n-well which can be used to shield the transistor from the substrate. In RF applications, this rule is difficult to fulfil. ^ Use different ..."
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RF Components and Circuits
Joe Carr

Excerpt - page 73: "... of the common base circuit is in VHF and UHF RF amplifiers in receivers. The base acts as a shield between the emitter and collector elements, which reduces the effect ..."
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High-Linearity CMOS RF Front-End Circuits
Yongwang Ding and Ramesh Harjani

Excerpt - page 20: "... reduce or eliminate the eddy current, either a patterned ground shield or a highly resis- 2r 01 ..."
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Electromagnetics Explained: A Handbook for Wireless/ RF, EMC, and High-Speed Electronics, Part of the EDN Series for Design Engineers (EDN Series for Design Engineers)
Ron Schmitt

Excerpt - page 265: "... MHz or higher. In addition to components purchased with integrated shields, circuits on PCBs can also ... is often used for the RF front-end circuitry of TVs and VCRs. It is very important ..."
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Textbook of Glaucoma
M. Bruce Shields

Excerpt - page 223: "... iridocorneal endothelial syndrome. Trans Am Ophthalmol Soc 81:736, 1983. 16. Shields, MB, Buckley, E, Klintworth, GK, ... Shields, MB, Campbell, DG, Simmons, RF: The essential iris atrophies . Am J Ophthalmol 85:749, 1978. ..."
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Design and Control of RF Power Amplifiers
Alireza Shirvani and Bruce A. Wooley

Excerpt - page 22: "... slots distributed across it to prevent eddy currents in the shield. Although proven to be effec- tive, patterned ground shields seem to have a limited effect at higher RF fre- quencies. The substrate coupling of an spiral inductor in ..."
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Silicon RF Power Mosfets
B. Jayant Baliga

Excerpt - page 93: "... a Faraday shield is illustrated in Fig. 4.27. The Faraday shield screens the gate from the ... capacitance which results in better RF performance. To illustrate the trade-offs in utilizing the Faraday shield, ..."
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RF Linear Accelerators (Wiley Series in Beam Physics and Accelerator Technology)
Thomas P. Wangler

Excerpt - page 22: "... not equal. It is convenient to define the ac or RF surface resistance RS = 1 ... conductor induce a current, which shields the ..."
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Atlas of Eyelid and Conjunctival Tumors
Jerry A. Shields and Carol L. Shields

Excerpt - page 135: "... Metastatic Tumors to the Eyelid Fig. 9-26 from Kindermann WR, Shields JA, Eiferman RA, Stephens RF, Hirsch SE. Metastatic renal cell carcinoma to the eye and ..."
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Chinks in the shield wall: Apertures in shielded enclosures are unavoidable, but RF leaks are not. The right gasket makes all the difference. (Dealing ... An article from: EE-Evaluation Engineering
Tom Lecklider

Radio Frequency Principles and Applications: The Generation, Propagation, and Reception of Signals and Noise (IEEE Press Series on RF and Microwave Technology)
Albert A. Smith

RF MEMS Circuit Design for Wireless Communications
Hector J. De Los Santos and Hector J. De Los Santos

Electromagnetic Analysis and Design in Magnetic Resonance Imaging
Jianming Jin

Excerpt - page 138: "... of resonance and reciprocity to illustrate the basic requirements of RF coils. We then describe a ... incorporate the effects of RF shields into the analysis of RF coils. After that, we apply ..."
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Low-Power CMOS Wireless Communications A Wideband CDMA System Design
Samuel Sheng and Robert W. Brodersen

Excerpt - page 164: "... ground planes, due to nonzero source resistance and induc- tance. Shield the RF traces from any digital switching lines by the digital lines ..."
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RF Measurements of Die and Packages
Scott, A. Wartenberg

Design and Test of Integrated Inductors for RF Applications
Jaime Aguilera and Roc Berenguer

Magnetic Resonance Imaging
Marinus T. Vlaardingerbroek, Jacques A. den Boer, F. Knoet, and A. Luiten

Excerpt - page 152: "... have a non-zero effect, are not excited in the inner shield of the magnet , but in the RF shield between the RF transmit coil and the gradient coils ..."
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Architectural Graphic Standards, Tenth Edition (Book only)
Charles George Ramsey, Charles George Ramsey, and John Ray Jr. Hoke

Excerpt - page 651: "... through the an (radiated) or through a wire (conducted) Typically, RF shield- ing is created with knockdown galvanized steel modular rooms or ..."
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Architectural Graphic Standards for Residential Construction (Ramsey/Sleeper Architectural Graphic Standards Series)
The American Institute of Architects

Excerpt - page 33: "... PLATE Solder or use copper tape to fasten the wall shield to the RF-SHIELDED DOOR AT STANDARD RF-SHIELDED DOOR AT MODULAR mesh Screen on ..."
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The Design and Evaluation of Physical Protection Systems
Mary Lynn Garcia

Excerpt - page 105: "... the separate sensor. Some of the concerns when using a RF sensor system include collisions, signal ... by too much material that shields the RF signal, such as large metal objects, metallic building ..."
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Systems Engineering Principles and Practice
Alexander Kossiakoff and William N. Sweet

Excerpt - page 46: "... Cable Joint Pipe Display Switch coupling Valve Control panel Isolator RF shield Shock mount Seal Cover insulator bearing Window Converter Antenna Gear ..."
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Build Your Own PC, 4th Edition (Build Your Own)
Morris Rosenthal

Excerpt - page 168: "... test fitting. The first step is to remove the metal RF shield blocking the floppy port. These are held in place by ..."
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PCB Design for Real-World EMI Control (The International Series in Engineering and Computer Science)
Bruce Archambeault

Excerpt - page 227: "... Connection Shield and Chassis between Cable Shield and Enclosure Chassis RF Current on Inside / of Cable Shield Cable Shield 'RF Current on Inner Conductor Enclosure Shield Figure ..."
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Build Your Own All-Terrain Robot
Brad Graham, Kathy McGowan, and Brad Graham

Excerpt - page 186: "... good cable will be heavily insulated and contain a good RF shield to block unwanted interference and electrical noise. If you follow ..."
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Handbook of Advanced Plasma Processing Techniques
R.J. Shul and S.J. Pearton

Excerpt - page 61: "... with the inductor removed. Capacitive coupling also exists between the rf coil and the plasma in ... be reduced by a Faraday shield between the rf coil and plasma. However, some capacitive coupling ..."
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Hacking Video Game Consoles: Turn your old video game systems into awesome new portables (ExtremeTech)
Benjamin Heckendorn

Excerpt - page 38: "... it upward to remove the part. Itreat for removing RF shields, socketed chips, and circuit board components that youhaving trouble ..."
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The Complete PC Upgrade and Maintenance Guide, 16th Edition
Mark Minasi, Faithe Wempen, and Quentin Docter

Excerpt - page 246: "... as are found in a power conditioner. A radio frequency (RF) shield between the primary and secondary coils of the transformer removes ..."
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Complete Wireless Design
Cotter W. Sayre

Excerpt - page 19: "... metal can itself, which is then grounded to provide an RF shield. A few of the more common transistor specifications found in ..."
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NIV Life Application Study Bible, Large Print
Bruce B. Barton

Excerpt - page 37: "... vision: "Do not be afraid, e Abram. I am your shield, rf your very great reward. s" 2But Abram said, "O Sovereign ..."
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The Circuit Designer's Companion, Second Edition
Tim Williams

Excerpt - page 19: "... cable shield connected to enclosures at both ends Figure 1.17 RF cable shield connections cable shield will not be effective against magnetic pickup, ..."
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