Photonic-Assisted Frequency Diverse Array

Baohang Mo, Jingxu Chen, Chuizhen Li, Erwin Hoi Wing Chan, Xudong Wang, Xinhuan Feng, Bai Ou Guan, Jianping Yao

Research output: Contribution to journalArticlepeer-review

Abstract

A new microwave photonic signal processor for use in a frequency diverse array (FDA) to generate a dot-shaped beampattern is presented. The microwave photonic signal processor is implemented based on a dual-polarization quadrature phase shift keying (DP-QPSK) modulator and a phase modulator (PM), with the amplitude and phase of an input radio frequency (RF) signal controlled by the bias voltages to the DP-QPSK modulator, and the frequency offset to the RF signal is realized by Serrodyne modulation at the PM. The operation of the signal processor is analyzed theoretically and demonstrated experimentally. The results show that the proposed signal processor can generate an RF signal with arbitrary controlled amplitude and phase and a frequency offset ranging from − 240.2 to 8.4 kHz. A dot-shaped beampattern generated by a 32-element nonuniform FDA is calculated using the experimentally generated RF signals. The beampattern exhibits a low peak sidelobe level (PSLL) of 0.3443 and narrow angle and range half power beamwidth of 7.69 ∘ and 2.35 km, respectively.
Original languageEnglish
Pages (from-to)1-13
Number of pages13
JournalIEEE Transactions on Microwave Theory and Techniques
DOIs
Publication statusE-pub ahead of print - 2024

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