AN EXPERIMENTAL SIMULTANEOUSLY SCANNED ANTENNA SYSTEM
Abstract
An experimental receiving antenna is described in which, through time modulation of its aperture distribution, angle-of-arrival information is obtained. By proper signal processing this information is effectively transformed to a group of simultaneous multiple beams with different beam pointing directions. Thus, an effective scanning antenna is produced without the use of variable phase shifters or mechanical motion of the array. A five-element simultaneously scanned system was constructed and tested. The antenna is an array of X-band slot radiators fed from a common feed guide through separate branch guides. Diode switches in the branch guides perform sequential on-off switching which provides the aperture modulation function. The fundamental modulation frequency is 10 kc. The output of the array is fed into a receiver whose bandwidth is 6 kc and which separates the various sideband frequencies. The general operation of this system is described and measured patterns at the carrier and sideband frequencies are shown. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1961
- Accession Number
- AD0275755
Entities
People
- A.t. Villeneuve
- F.g. Terrio
- W.h. Kummer