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Retrodirective Rotman Lens Antenna
The purpose of this paper is to present the theoretical design of a passive retroderective array architecture based on a microstrip Rotman lens. The true time delay property of th e beamforming network is exploited to perform automatic high gain antenna pointing with broadband capability. The analysis and performance optimisation carried out using Remcom Rotman Lens Designer (RLD) software and CST Microwave Studio (MWS) and requires design features not normally considered when the lens is operated as a beamforming network for an array. The structure, which has 21 beams and 12 array ports, is designed to minimise bistatic beam pattern squinting and monostatic RCS ripple over the frequency range 8 - 12 GHz.
Key words: RF-60A, Rotman Lens antenna, 8 - 12 GHz
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