Bicollimated Near-Field Gregorian Reflector Antenna
NAVAL RESEARCH LAB WASHINGTON DC
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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.
- Electrical and Electronic Equipment
- Radiofrequency Wave Propagation