Accession Number : ADD007348

Title :   Folded Tapered Coaxial Cavity-Backed Annular Slot Antenna.

Descriptive Note : Patent,


Personal Author(s) : Seeley,Elwin W

Report Date : 29 Apr 1980

Pagination or Media Count : 5

Abstract : A low profile transmitting antenna consisting of a circular slot in a coaxial cavity that is folded several times. The last inner fold of the coaxial cavity is loaded with the tuning coil. The tuning coil can in the alternative be connected in series with the transmitter leeds connected to the radiating slot. Concentric cylinders alternately attached to the top and bottom of the cavity are used to form ;the folded coaxial cavity that provides the equivalent of a tapered transmission line. Energy to be transmitted is fed across the circular slot of the antenna or in the alternative may be fed into the last inner fold in the center of the cavity. The antenna radiates energy out with the same radiation pattern as a vertical monopole antenna. (Author)

Descriptors :   *Patents, *Slot antennas, *Monopole antennas, Very low frequency, Extremely low frequency

Subject Categories : Electrical and Electronic Equipment
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE