High-frequency design becomes unforgiving when traces behave like transmission lines, impedance mismatches create reflections, and a circuit that looks perfect in simulation fails on the bench. This practical guide helps you build the physical intuition and analytical discipline needed to solve those problems with confidence. Designed for senior electrical students, graduate learners, and practicing hardware professionals, the book moves from distributed behavior and standing waves into impedance transformation, waveguides, resonators, filtering, couplers, device selection, amplification, oscillation, frequency conversion, antennas, measurement, radar, satellite links, 5G/6G, and sensing. Inside, you'll learn how to: Read Smith charts and interpret reflection, VSWR, gain, and stabilitySelect matching approaches based on bandwidth, loss, Q, and toleranceAnalyze wave propagation, resonant structures, filters, dividers, and couplersWork with GaAs, GaN, SiGe, diodes, LNAs, power stages, sources, and mixersUse S-parameters, calibration, and vector network analyzer workflowsConnect component behavior to radar, satellite, communication, and sensing hardwareApply worked examples using realistic device data and practical constraintsRecognize bench pitfalls through "Lessons Learned" guidance Avoid costly mismatch, calibration, layout, and component-selection errors. Build the judgment to move from equations to verified hardware and turn complex high-frequency problems into structured, testable decisions.
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