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.
Wave propagation on guided structures — characteristic impedance, reflection, standing waves, and microstrip design.
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.
Understand radiation patterns, antenna gain, directivity, polarisation, and the fundamentals of how antennas radiate and receive electromagnetic energy.
Read guide →A practical introduction to frequency, wavelength, the electromagnetic spectrum, free-space path loss, and the physics behind radio wave propagation.
Read guide →A complete practical guide to decibels in RF engineering — what dB, dBm, dBi, dBd, and dBW mean, how to convert between them, and how to apply them in link budgets, noise calculations, and antenna gain comparisons.
Read guide →A complete practical guide to impedance matching in RF engineering — covering VSWR, reflection coefficient, the Smith chart, L-networks, quarter-wave transformers, stub matching, and practical techniques for minimising return loss.
Read guide →How resistors, capacitors, and inductors really behave at radio frequencies — parasitic models, self-resonance, impedance vs frequency graphs, and practical guidelines for selecting components in RF circuits.
Read guide →How much signal power arrives at a receiving antenna? The Friis equation connects transmit power, antenna gains, and free-space path loss into a single expression — the foundation of every wireless link budget.
Read guide →Reach out directly — we're a small team of RF engineers and we actually reply.