Antennas

Radiation Resistance

Approximate values of radiation resistance for vertical antennas over perfectly conducting ground (A) and for […]

Basic half-wave antennas. At A, dipole antenna. At B, foldeddipole antenna. At C, zepp antenna. […]

A quarter wavelength is related to frequency by the equation: Lft = 246v/fo where Lft […]

A small loop antenna with a capacitor for adjusting the resonant frequency. Any receiving or […]

End-fed λ/4 antennas, such as the ground plane, require low-loss RF ground systems in order […]

The power gain of a transmitting antenna is the ratio of the maximum effective radiated […]

A phased array uses two or more driven elements (radiators connected directly to the feed […]

Parasitic arrays are used at frequencies ranging from approximately 5 MHz into the microwave range […]

At ultrahigh frequencies (UHF) and microwave frequencies, high-gain antennas are reasonable in size because the […]

Antennas should never be placed in such a way that they can fall or blow […]