Invention Grant
- Patent Title: Apparatus and method for producing an annular composite far-field patterned beam(s)
- Patent Title (中): 用于制造环形复合远场图案束的装置和方法
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Application No.: US13690605Application Date: 2012-11-30
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Publication No.: US08724219B1Publication Date: 2014-05-13
- Inventor: Michael Johnny Wardlaw , Ramesh Kumar Shori , Ralph Steven Kurti
- Applicant: The United States of America as Represented by the Secretary of the Navy
- Applicant Address: US DC Washington
- Assignee: The United States of America as Represented by the Secretary of the Navy
- Current Assignee: The United States of America as Represented by the Secretary of the Navy
- Current Assignee Address: US DC Washington
- Agent Christopher L. Blackburn; James M. Saunders
- Main IPC: G02B5/30
- IPC: G02B5/30

Abstract:
Method and apparatus to generate a composite far field beam having a central null and discrete cylindrical symmetry. A phased array of Gaussian beams was used to form an annular far-field pattern as opposed to the normal peaked pattern in most phased arrays. This annular pattern arises from the radial symmetry of the polarization in each beam. Beams opposite one another in the annulus are polarized in the same direction but are 180° out of phase. This causes the center portion of the beam to be a null rather than a peak.
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