title: Photonic dual RF beam reception of an X band phased array antenna using a photonic crystal fiber-based true-time-delay beamformer.
abstract: We report dual RF beam reception of an X band phased array antenna using a photonic crystal fiber (PCF)-based delay network. Each incoming RF signal can be independently received, and the angle of arrival can be determined based on the delay time-dependent wavelength. Two RF signals with frequencies 8.4 and 12 GHz impinge upon an X-band antenna array from -7.4 degrees and -21.2 degrees . These signals are detected, and the angle of arrival is determined with a very good degree of accuracy using PCF-based true-time delay. The total number of RF beams that can be simultaneously detected is limited by the hardware availability and the bandwidth of the wavelength differentiation capability of the system.
authors.affiliation: Microelectronics Research Center, Department of Electrical and Computer Engineering, University of Texas at Austin, Austin, Texas 78758, USA.
authors.forename: Harish
authors.initials: H
authors.lastname: Subbaraman
authors.forename: Maggie Yihong
authors.initials: MY
authors.lastname: Chen
authors.forename: Ray T
authors.initials: RT
authors.lastname: Chen