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Radio Susceptibility Follows Laws of PhysicsPublication: EE Times Communications Designline December 14, 2011 -- Engineers often wish that radio susceptibility (RS) or radio immunity could be addressed with a vaccine or some other form of cure-all. Conquering the RS problem is not that easy, however, because the laws of physics apply in electronic systems. RS is a system specification primarily for radio ICs, with a few exceptions. Most of these circuits in most systems are isolated from the external world by the case (shielding) power-supply decoupling networks, powerline filters and isolation circuits. There are two exceptions to this norm: radio devices that are directly connected to antennas, and other devices connected to system input and output ports. Adding complexity to enable RS protection for internal system parts is not a cost-effective strategy.
By Bill Laumeister. (Laumeister is an engineer in strategic applications with the Precision Control Group at Maxim Integrated Products.) | |
Reprinted from SOCcentral.com, your first stop for ASIC, FPGA, EDA, and IP news and design information. | |