Accession Number : ADD001742

Title :   Aircraft VLF/LF/MF Window Antenna Receiving System.

Descriptive Note : Patent Application,


Personal Author(s) : Bickel,John E

Report Date : 16 Jun 1975

Pagination or Media Count : 9

Abstract : The patent application describes apparatus for receiving the horizontal and vertical electric field components of incoming VLF, LF, and MF (10 KHz to 3000 kHz) signals that is easily portable and installed within minutes aboard aircraft with windows. A sheet of metal or matrix of interconnecting wires is placed against the inside surface of non-conducting windows on each side of the aircraft fuselage and used as the receiving antennas. The voltage sum of the two window antennas is proportional to the vertical electric field. The voltage difference of the two window antennas is proportional to the horizontal electric field particularly when the antennas are forward or to the rear of the wings extending from the fuselage.

Descriptors :   *Recording systems, Patents, Electric fields, Very low frequency, Low frequency, Medium frequency, Portable equipment, Antennas, Airborne, Receivers

Subject Categories : Recording and Playback Devices
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE