Every electronic product that matters to modern life - the smartphone in a pocket, the server rack in a data centre, the ventilator in a hospital, the driver-assistance computer in a car - ultimately rests on a printed circuit board. For decades, the board was treated as little more than a mechanical carrier: a place to solder components and connect them with copper. That view stopped being true the moment signal edges became faster than the time it takes light to cross a few centimetres of laminate. Today the board is itself a circuit element: a distributed network of transmission lines, capacitors, inductors, antennas and heat spreaders, whose behaviour decides whether a design works, whether it passes regulatory testing, and whether it survives in the field. This book was written to teach that board-level physics and the engineering practice that follows from it. It is organised around four ideas that every advanced designer must hold at once. The first is layout: the geometry of copper, dielectric, vias and components, which fixes every electrical property of the interconnect. The second is signal integrity: the discipline of making a signal arrive at its receiver with enough voltage and timing margin to be read correctly. The third is power integrity: the discipline of delivering clean, stable energy to every active device, at every frequency, under every load transient. The fourth is electromagnetic compatibility: the discipline of ensuring that the product neither disturbs other equipment nor is disturbed by it. These four views are not separate subjects; they are four projections of one underlying electromagnetic problem, and this book treats them that way. Who this book is for The text is intended for final-year undergraduate and postgraduate students in electronics, electrical, communication and computer engineering, for practising hardware designers who want a rigorous foundation behind the design rules they already follow, and for researchers who need a coherent reference to the interconnect problem. A working knowledge of circuit analysis, basic electromagnetics and digital electronics is assumed. Where more advanced mathematics is required - for example, for transmission-line theory or scattering parameters - the necessary results are derived or motivated from first principles, and worked examples show how to use them. Every electronic product that matters to modern life - the smartphone in a pocket, the server rack in a data centre, the ventilator in a hospital, the driver-assistance computer in a car - ultimately rests on a printed circuit board. For decades, the board was treated as little more than a mechanical carrier: a place to solder components and connect them with copper. That view stopped being true the moment signal edges became faster than the time it takes light to cross a few centimetres of laminate. Today the board is itself a circuit element: a distributed network of transmission lines, capacitors, inductors, antennas and heat spreaders, whose behaviour decides whether a design works, whether it passes regulatory testing, and whether it survives in the field.
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