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
Personal Author(s):
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
Descriptors:
Subject Categories:
- Electrical and Electronic Equipment