Electronics 01
Quarter Wave Antenna Length: 234/f, 246/f and Why
A quarter wave is 246/f feet (74.95/f m), but a resonant whip is 2 to 7% shorter, depending on wire thickness. Worked 433 MHz and 2.4 GHz lengths.
antennas
Electronics 02
What Is VSWR? Reflections, Return Loss and Real Loss
VSWR 2:1 reflects 11% of the power, but that power is not simply lost. How VSWR, gamma, return loss and mismatch loss relate, with worked numbers.