Investigation of array techniques for multiple beams within limited spatial sectors
Abstract
An antenna technique which is capable of providing multiple independent beams over limited scan sections has been developed. This antenna design utilizes overlapping subarrays fed by a stacked-pillbox multiple beam lens. Beams generated by the multiple beam lens can be selected by a beam switching matrix. An antenna design has been worked out to provide 8 or 16 multiple simultaneous beams over an 8 degree half angle cone. The antenna depth is less than the aperture diameter so that it is compact. In this design, sidelobe level of -25 db or lower is achieved with adjacent beams cross over at -2 db. Multiple simultaneous beams with negligible beam coupling loss is accomplished by selecting beams which are more than one beam step apart.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- June 1977
- Bibcode:
- 1977STIN...7812283T
- Keywords:
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- Antenna Arrays;
- Lens Antennas;
- Multiple Beam Interval Scanners;
- Beam Switching;
- Coupled Modes;
- Electromagnetic Interactions;
- Matrices (Circuits);
- Communications and Radar