Gyro Interaction of Radio Waves

Abstract

A THEORY of the interaction of radio waves in the ionosphere, first reported by Tellegen¹ in 1933 and afterwards observed by many others, was given by Bailey and Martyn². According to this theory, the modulation M impressed by the interfering longwave station on the medium wave-length transmission reflected from the ionosphere in the vicinity of the long-wave station is where P is the power, D the depth of modulation and n/2Ï the modulation frequency of the long-wave station. v₀ is the collision frequency of an electron in thermal equilibrium with the gas molecules in that portion of the E-layer traversed by the wave of medium wave-length. The quantity G is a constant which relates the mean fractional loss of energy of / of an electron in collisions with molecules of the gas to the collision frequency v in a state of motion where the mean energy of agitation of the electrons slightly exceeds that of the gas molecules.