Efficient Phase-Only Dual- and Multi-Beam Pattern Synthesis with Accurate Beam Direction and Power Control Employing Partitioned Iterative FFT

• Published in: IEEE transactions on antennas and propagation Vol. 71; no. 4; p. 1
• Main Authors: Li, Ming, Liu, Yanhui, Bao, Zhiming, Chen, Liyang, Hu, Jun, Jay Guo, Y.
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.04.2023; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Beam calibration; beam scanning; Calibration; Fourier transforms; Genetic algorithms; Indexes; Iterative methods; multi-beam pattern synthesis; partitioned iterative Fourier transform (PIFT); Partitioning algorithms; Power control; Sidelobe reduction; Sidelobes; Synthesis
• ISSN: 0018-926X; 1558-2221
• DOI: 10.1109/TAP.2022.3226140

In this communication, a novel phase-only method based on a partitioned iterative Fourier transform (PIFT) is presented to efficiently synthesize dual- and multi-beam patterns for uniformly spaced linear and planar arrays. To achieve accurate mainlobe peak directions, the PIFT integrates a partitioned beam calibration strategy into the iterative Fourier transform (IFT) to successively calibrate the beams by partitioning the multi-beam pattern into single-beam patterns and calibrating them individually. Besides, the peak powers of the multiple beams are precisely controlled through proper mainlobe corrections. Several numerical examples of synthesizing dual- and multi-beam patterns with accurately controlled peak directions and beam powers as well as reduced sidelobe levels (SLLs) are presented to demonstrate the effectiveness and efficiency of the proposed method. Synthesized results are validated with full-wave simulation. Comparisons with other phase-only methods are also presented to show the superiority of the proposed method.