Bicollimated Near-Field Gregorian Reflector Antenna

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Abstract:

A bicollimated near-field Gregorian reflector is structurally similar to a classical confocal parabolic reflector, but its surfaces are shaped to have better scan capability. A geometrical optics procedure is used in designing the reflector surfaces. A three-dimensional ray tracing procedure is used in analyzing the aperture phase errors as the beam is scanned to different angles. The results show that the bicollimated configuration has about 45 greater angular scanning range than the corresponding confocal parabolic dual-reflector system.

Author(s):
Rao, J. B. L.
Author Organization(s):
NAVAL RESEARCH LAB WASHINGTON DC
Descriptive Note:
Interim rept.
Pagination:
0016

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
NRL-8658
Task Number(s):
RR0210543
Project Number(s):
RR02105
Monitor Series:
NRL
 Subject Terms
Joint Capability Areas:
JCA_5_Command and Control
Modernization Areas:
Microelectronics
Communities of Interest:
Air Platforms
Descriptor(s):
*ELECTRONIC SCANNERS, *RAY TRACING, *REFLECTORS, *DIRECTIONAL ANTENNAS, SCANNING, ANGLES, ARRAYS, SURFACES, APPROXIMATION(MATHEMATICS), ERRORS, ANTENNAS, NEAR FIELD, ANTENNA FEEDS, PARABOLIC ANTENNAS
Field(s)/Group(s):
Electrical and Electronic Equipment, Radiofrequency Wave Propagation
Keyword(s):
GREGORIAN ANTENNAS, FEED ARRAYS, BIOCOLLIMATED ANTENNAS, SUBREFLECTORS, DUAL REFLECTOR ANTENNAS, POLYNOMIAL APPROXIMATIONS, OPTICS(GEOMETRICAL), ERROR ANALYSIS, PHASE ERRORS, PE61153N, WU0624
Report Date:
1983 Feb 09