Accession Number : ADP007448

Title :   Flush Mounted Flour-Arm Spiral With Shallow Backup Cavity,

Corporate Author : MOTOROLA INC TEMPE AZ GOVERNMENT ELECTRONICS GROUP

Personal Author(s) : Kobus, Joseph ; Munger, David

Report Date : FEB 1992

Pagination or Media Count : 30

Abstract : Performance is presented of a four-arm 3.7 inch diameter 2-18 GHz spiral antenna flush mounted on a ground plane containing a shallow recessed backup cavity. The spiral arms are precision etched on a .025 inch fiberglass substrate suspended .150 inch above the bottom of the cavity with a honeycomb spacer, forming a bonded assembly. Both measured and calculated sum and difference patterns, and gain are included. Calculated patterns are obtained, together with currents on the spiral arms, using a wire model Method of Moments simulation.

Descriptors :   *ANTENNAS, *SPIRAL ANTENNAS, ASSEMBLY, DIAMETERS, FIBERGLASS, GAIN, METHOD OF MOMENTS, MODELS, MOMENTS, PATTERNS, PRECISION, SIMULATION, SPACERS, SUBSTRATES, WIRE.

Subject Categories : Electrical and Electronic Equipment
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE