From first principles to advanced beamforming — our library of guides, tutorials, and deep-dives is free for engineers, students, and enthusiasts worldwide.
Structured topic guides — each covers a complete subject area with articles, equations, and worked examples.
From why a wire becomes a transmission line to a measured RF board — RLGC model, Z₀, propagation, reflections and VSWR, losses, microstrip, CPW, stripline, stubs, discontinuities and resonators.
A practical guide to the most common antenna types — how each works, where it's used, and how to choose the right one for your application.
From electric and magnetic fields to the four equations, electromagnetic waves and boundary conditions — and how they shape lines, waveguides and antennas.
From impedance, reflection coefficient and VSWR to reading the Smith chart and designing L-network and stub matches for real antennas.
How antennas radiate, and every parameter that describes them — patterns, directivity and gain, impedance, S11, efficiency, bandwidth, polarization, aperture and the Friis link.
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.
Read guide →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.
Read guide →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.
Read guide →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.
Read guide →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.
Read guide →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.
Read guide →Reach out directly — we're a small team of RF engineers and we actually reply.