MODULATION PHENOMENA IN A TIME-VARYING TRANSMISSION SYSTEM.
Abstract
Sidebands have been observed in the transmission of monochromatic radiation from systems composed of long wire antennas fed by parallel-wire transmission lines. As the wires composing such systems are very long and are supported at relatively few points, it has been suggested that the modulation is introduced by the vibration of these wires in the wind. In this report this possibility is investigated for two specific cases: (a) harmonic change in the characteristic impedance of the transmission line, which leads to amplitude modulation; and (b) harmonic change in the phase velocity along the transmission lines, which leads to frequency or phase modulation. Some numerical examples are given which tend to show that only extreme variations of the (a) or (b) types can cause the sidebands to be of the order 40db below the carrier level. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1966
- Accession Number
- AD0482536
Entities
People
- Jose Perini
- Martin Sherman
Organizations
- Syracuse University