Practical picture
Radio waves do not always take the path you expect. Learn what controls range, fading, polarization, wavelength, and the propagation modes that let signals travel beyond ordinary line of sight.
T3 · Radio Wave Propagation
T3 Radio Wave Propagation
Radio waves do not always take the path you expect. Learn what controls range, fading, polarization, wavelength, and the propagation modes that let signals travel beyond ordinary line of sight.
Technician exam focus
T3 has 3 question groups and contributes 3 questions to a Technician exam — one from each group.
Subelement T3
Radio Wave Propagation
Work through the groups below in any order. Each page teaches the idea in normal language while keeping the tested terminology recognizable.
T3A · 12 pool questions
Signal Paths, Fading & Polarization
How radio signals travel, fading, multipath, polarization, absorption, and antenna orientation.
Study T3A →T3B · 12 pool questionsRadio Waves, Frequency & Wavelength
Electromagnetic-wave properties, frequency/wavelength relationships, wave velocity, and HF/VHF/UHF definitions.
Study T3B →T3C · 11 pool questionsPropagation Modes & the Radio Horizon
Sporadic E, meteor scatter, auroral propagation, tropospheric ducting, F-region skip, line of sight, and radio horizon.
Study T3C →Close the loop
Quiz Me on T3
Study the concepts here, then use the current public-domain Technician pool to see how they are asked on the exam.
Exam scope: NCVEC 2026–2030 Technician Class (Element 2), effective July 1, 2026 through June 30, 2030, with February 19, 2026 errata. The current NCVEC pool is the exam authority; explanatory prose here is SPARKA teaching material. NCVEC pool