Accession Number:

AD0757907

Title:

A Scanned Flush-Mounted Multimode Slot Antenna.

Descriptive Note:

Rept. for Aug-Oct 70,

Corporate Author:

AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

Report Date:

1973-01-31

Pagination or Media Count:

22.0

Abstract:

The report describes the electrical characteristics of a multimode slot antenna that has a scan capability. The antenna consists of a rectangular slot with a onewavelength aperture, excited with an offset probe, that couples energy into the desired TE sub 10 and TE sub 20 rectangular waveguide modes. This combination of modes produces a beam that is tilted from the slot broadside. The resultant beamwidth is narrower than that of a comparable slot excited in the dominant mode. The beam shape and scan angle depend on operating frequency and relative excitation of the two modes. A slot was mounted axially on a circular cylinder, and pattern, gain, and VSWR measurements were performed at LS band frequencies for both air-filled and dielectrically loaded configurations. Author

Subject Categories:

  • Electrical and Electronic Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE