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Iron Shielding for Telephone Cables
Transactions of the American Institute of Electrical Engineers, 1934Among the benefits obtained by the cabling of telephone circuits is the substantial reduction in magnetically induced voltages that can be realized from the shielding action of the lead sheath. Even greater shielding is attainable if the cable is provided with a steel armor or is installed in conduit. In this paper is preiron pipe conduit.
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Shield behaviour of communications cables
IEE Proceedings - Science, Measurement and Technology, 2003This output reports the findings of research sponsored by Brand-Rex Ltd (contact Ken Hodge khodge@brand-rex.com) to a value of over £200k. The company has used the findings reported in this paper to improve design and testing methods used for their newer structured cabling solutions.
A.R. Coates +4 more
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1995
As discussed in the previous chapter, electronic cables and connectors contribute to system EMI and EMC problems as (1) emitters that radiated part of the conducted signal and (2) receptors that are susceptible to ambient electromagnetic fields. Therefore, the shielding objective is to confine EMI signals within (to solve emission problems) and outside
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As discussed in the previous chapter, electronic cables and connectors contribute to system EMI and EMC problems as (1) emitters that radiated part of the conducted signal and (2) receptors that are susceptible to ambient electromagnetic fields. Therefore, the shielding objective is to confine EMI signals within (to solve emission problems) and outside
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1995
In this chapter, we will discuss the fundamental concepts of the cable shield specification and design. Along with the cable EMC performance, we will address important problems pertaining to shield reliability and performance stability. We will also review some of the “nontraditional” and/or innovative processes, designs, and applications of cable ...
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In this chapter, we will discuss the fundamental concepts of the cable shield specification and design. Along with the cable EMC performance, we will address important problems pertaining to shield reliability and performance stability. We will also review some of the “nontraditional” and/or innovative processes, designs, and applications of cable ...
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Cable Shielding Measurements at Microwave Frequencies
IEEE Transactions on Electromagnetic Compatibility, 2004A matched triaxial device is developed and constructed to measure the transfer impedance of braided coaxial cables at microwave frequencies. Full-design principles of the device have been developed and given in detail in the paper. The device is particularly suited for shielding measurements at frequencies up to 3.5 GHz, for which no comparable ...
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A FEM approach to shielding effectiveness in braided-shield cables
IEEE Transactions on Magnetics, 1990The coupling between an electromagnetic field and a braided-shielded cable is analyzed using a numerical approach. Penetration of the magnetic field through the shield and apertures is described by the homogeneous Helmholtz equation in terms of the magnetic vector potential.
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Shielded cable modeling in PSpice for shielding effect analysis
2012 Asia-Pacific Symposium on Electromagnetic Compatibility, 2012This paper gives a method to simulate the shielded cable in PSpice. The multiconductor transmission line theory is applied to deal with the cable system. The influence of the grounding conditions on the shielding effect is studied. Through simulations, it is observed that imperfect grounding of the shield can lead different cross-talk in the inner ...
Kelin Jia +2 more
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Optimized single-braided cable shields
IEEE Transactions on Electromagnetic Compatibility, 1993Approximate formulas for the coupling parameters of cables with single-braided shields are presented. The derivation of the formulas is based on a qualitative analysis of the coupling mechanisms; these qualitative approaches have been verified and adjusted to reality by measuring many different braids.
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Portable, Shielded, Repeatable and Adjustable Cable Shielding Effectiveness Tester
2021 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC), 2021Improperly constructed shielded cables can cause high electromagnetic emissions due to common-mode currents. Device manufacturers perform cable shielding effectiveness tests to shielded cables to qualify them by measuring the amount of common-mode current that arises in the cable shield.
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2019
Shielded wires and cables are used within electrical and electronic system to reduce electromagnetic interference (EMI) within a system. The interference of concern is capacitive and inductive coupling from wire to wire. The termination of the shields for both capacitive and inductive coupling is critical and fully discussed.
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Shielded wires and cables are used within electrical and electronic system to reduce electromagnetic interference (EMI) within a system. The interference of concern is capacitive and inductive coupling from wire to wire. The termination of the shields for both capacitive and inductive coupling is critical and fully discussed.
openaire +1 more source