Accession Number : ADA019506

Title :   Rotor Effects on L. Band Signals Received by Helicopter Antennas. Part III. Measurements of the Amplitude and Phase Distortions of CW Signals.

Descriptive Note : Final experimental rept. CY 73,

Corporate Author : ARMY ELECTRONICS COMMAND FORT MONMOUTH N J

Personal Author(s) : De Santis,C. M. ; Schwering,F.

Report Date : DEC 1975

Pagination or Media Count : 36

Abstract : An experimental study of rotor-blade-induced distortions of L-band signals has been carried out to verify the results of a previous theoretical investigation. These signals were received by helicopter antennas mounted on the cabin roof below the rotor. To verify the theoretical findings, the effects of such distortions on horizontally and vertically polarized incident signals were measured for several directions of incidence. The results of both the theory and experiments are in excellent agreement.

Descriptors :   *Radio reception, Helicopter rotors, Aircraft antennas, Helicopters, L band, Radio signals, Radio navigation, Phase distortion, Electromagnetic scattering, Electromagnetic shielding, Doppler effect

Subject Categories : Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE