Accession Number:

AD0724686

Title:

Performance of a 110-Wavelength EHF Waveguide Lens

Descriptive Note:

Technical note

Corporate Author:

MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB

Personal Author(s):

Report Date:

1971-04-23

Pagination or Media Count:

28.0

Abstract:

Expanded aluminum honeycomb with a nominal cell width of 0.156 inch was used to fabricate a 24-inch-diameter unzoned lens for operation at 55 GHz. The lens exhibits good focusing properties but its efficiency of only 18 percent reflects significant random phase errors. These errors are shown to result mainly from variations of the cell width. From the measured radiation characteristics the average width of the cells is deduced to be 0.161 inch with a standard deviation of 0.003 inch. Since phase errors associated with variations of the cell width are proportional to the lens thickness it is deduced that the much thinner zoned lenses fabricated from this material would exhibit efficiencies approaching 50 percent.

Subject Categories:

  • Electrical and Electronic Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE