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Chapter Three "Three key parameters for magnetics in signal transmission include field strength, higher permeability, and conductivity." Bhanu Prakash Villuri Lead Project Engineer, Stanley Black & Decker, Inc. Magnetic Components for Signal Transmission Beyond power applications, signal transmission is one of the most fundamental use cases for magnetics. Signal transmission can be defined as the electronic circuitry needed to appropriately transport electrical signals from transmitter to receiver as defined by a given protocol. This is a considerably broad field and includes applications such as radio frequency (RF) wireless communications, analog, digital, and audio. Within this, the goal is to faithfully reproduce and deliver a given data stream while mitigating the deleterious effects of noise in the system. Magnetic components are a major contributor to the quality of a signal transmission circuit, as they form the basis of the necessary filtering blocks within the systems. System characteristics such as distortion, insertion loss, and return loss are heavily influenced by the use of system magnetics, and the right choice of components can make or break a system. When considering magnetic components for signal transmission, the communication protocol is a major determining factor that defines how the components must be built. Each protocol requires different specs such as operating frequencies or current levels, meaning that the choice of the magnetic components will vary from protocol to protocol. At the same time, designers must balance trade-offs among performance, size, and cost to meet the overall system requirements of their product, making component selection a daunting task. Chapter Three 11 I Magnetic Components for Signal Transmission