![]() ![]() At these high frequencies, the reflected signal in a conductive shielding system can cause serious problems for the shielded device itself and/or for other adjacent components. However, modern electronic devices operate at hundreds of MHz with harmonic noise emissions in the GHz region. The shielding solution envelops the noise source, increases the grounding level, and suppresses radiated noise. Widely used commercial shielding products include: shield can, conductive gasket, and foil- and mesh-type tapes. Shielding with a conductive material is the most common way of solving RF noise problems. Relative permeability and permittivity spectrum with frequency. ![]() Although there have been significant advances in device and PCB design technology that reduce electromagnetic interference (EMI), RF noise remains one of the most difficult problems facing design engineers. For example, modern cellular phones are being equipped with high-speed microprocessors, wireless LANs, Bluetooth, MP3s, cameras, motion sensors, touch screens, GPS and many other devices. These issues challenge hardware design engineers, and the challenges escalate as today’s electronic equipment becomes both thinner and multifunctional. Electrical Markets Division, 3M Korea Seoul, South KoreaĮlectromagnetic interference issues can arise anywhere in electronic equipment with unpredictable and troublesome effects. ![]() Thin and flexible materials can provide simple and innovative solutions for hardware engineers ![]()
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