Near-field testing of the 30 GHz TRW proof-of-concept multibeam antenna
Abstract
Near-field testing was conducted on the 30 GHz TRW proof-of-concept (POC) Multibeam Antenna (MBA). The TRW POC MBA is a dual offset Cassegrain reflector system using a 2.7 m main reflector. This configuration was selected to assess the ability to create both multiple fixed and scanned spot beams. The POC configuration investigated frequency reuse via spatial separation of beams, polarization selectivity and time division multiple access scanning at 30 GHz. Measurements of directivity, sidelobe level, and pattern were made at NASA Lewis Research Center's Near-Field Antenna Test Facility. Presented in this paper are complete results of these measurements. Included is a detailed discussion of all testing procedures and parameters. Results of additional testing used to evaluate diffraction effects of the subreflector and distortions of the main reflector are also presented.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- 1986
- Bibcode:
- 1986STIN...8627578K
- Keywords:
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- Antenna Radiation Patterns;
- Cassegrain Antennas;
- Multibeam Antennas;
- Near Fields;
- Proving;
- Two Reflector Antennas;
- Directivity;
- Satellite Antennas;
- Sidelobes;
- Electronics and Electrical Engineering