RF & Antenna Education

From first principles to advanced beamforming — our library of guides, tutorials, and deep-dives is free for engineers, students, and enthusiasts worldwide.

Learning Paths

Structured topic guides — each covers a complete subject area with articles, equations, and worked examples.

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Beginner
RF Fundamentals

Introduction to Electromagnetic Fields

Part 1 of the Maxwell's equations series: electric and magnetic fields, field intensity, field lines, Coulomb and Biot–Savart laws, the Lorentz force, electric vs magnetic fields, an introduction to electromagnetic waves, and why field theory matters in RF engineering.

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Intermediate
Transmission Line Theory

Terminated Lossless Transmission Lines

Applying boundary conditions to a lossless line with an arbitrary load — voltage reflection coefficient, input reflection coefficient, input impedance formula, quarter-wave transformer, stub reactances, standing wave patterns, and VSWR.

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Beginner
RF Fundamentals

Understanding Electric Flux and Gauss's Law

Part 2: electric flux through flat and arbitrary surfaces, Gaussian surfaces, Gauss's law in integral and differential form, fields of point charges, charged spheres and conducting spheres, and the electric field and capacitance of a coaxial cable.

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Beginner
RF Fundamentals

Understanding Magnetic Flux and Gauss's Law for Magnetism

Part 3: magnetic flux and its units, flux linkage, magnetic field lines, Gauss's law for magnetism (∮B·dA = 0, ∇·B = 0), why magnetic monopoles do not exist, and magnetic flux in inductors, transformers and RF components.

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Intermediate
RF Fundamentals

Faraday's Law of Electromagnetic Induction

Part 4: the discovery of induction, Faraday's law and its negative sign, Lenz's law, integral and differential forms, and applications in generators, transformers, inductive coupling, wireless power transfer, NFC and EMI.

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Intermediate
RF Fundamentals

Ampere's Circuital Law

Part 5: magnetic fields of currents and the right-hand rule, enclosed current, Ampère's law in integral and differential form, fields of wires, solenoids, toroids and coaxial lines, coax inductance and characteristic impedance, and the law's limitations.

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Intermediate
RF Fundamentals

Maxwell's Displacement Current

Part 6: the capacitor charging paradox, current continuity, displacement current and its density, the Ampère–Maxwell law, how changing electric fields create magnetic fields, and displacement current in capacitors, wave propagation and RF dielectrics.

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Intermediate
RF Fundamentals

The Four Maxwell's Equations Explained

Part 7: the history of Maxwell's equations, each of the four equations in integral and differential form with physical meaning and RF examples, integral vs differential form, constitutive relations (permittivity, permeability, conductivity) and how the equations work together.

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Advanced
RF Fundamentals

Deriving the Electromagnetic Wave Equation

Part 8: what an electromagnetic wave is, step-by-step derivation of the wave equation from Maxwell's equations, the speed of light, wavelength and phase velocity, the 377 Ω impedance of free space, and propagation in dielectrics, lossy media and conductors (skin depth).

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Advanced
RF Fundamentals

Maxwell's Equations and Electromagnetic Boundary Conditions

Part 9: normal and tangential field components, boundary conditions for E, D, H and B derived from Maxwell's equations, surface charge and current, reflection and transmission at normal incidence, quarter-wave matching, and microstrip, antenna substrate and shielding applications.

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Intermediate
RF Fundamentals

Applications of Maxwell's Equations in RF Engineering and Antennas

Part 10: Maxwell's equations applied to transmission lines (TEM, Z₀, standing waves), waveguides (TE/TM modes, cut-off), microstrip (ε_eff, quasi-TEM, filters, dividers), antennas (radiation, near/far field, patterns, polarisation, gain) and FEM/FDTD simulation in HFSS and other EM solvers.

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Beginner
RF Fundamentals

Introduction to Impedance in RF Engineering

Part 1 of the Smith chart series: what impedance is, resistance and reactance, inductive and capacitive behaviour, real and imaginary parts, phasor notation, impedance in AC circuits and why impedance matters in RF engineering, with worked examples.

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