RF vs NFC — radiated far-field vs inductive near-field
Antenna Families — monopole, dipole, IFA, MIFA, meander, patch, loop, helical, chip, and how the printed inverted-F this tool builds differs from a plate-over-ground PIFA
VSWR & Return Loss — bare vs matched feed impedance
Matching Networks — L, Pi and T topologies
Ground Planes — counterpoise size and efficiency
Efficiency, Gain & Bandwidth — substrate loss and the Chu limit
Bench Bring-up — VNA tuning and FCC/RED pre-compliance