Photonic-assisted radio frequency waveform generation for high-range resolution microwave radar

Wenrui Zhang; Changqing Cao; Xiaodong Zeng; Zhejun Feng

doi:10.1117/1.OE.57.11.114103

15 November 2018 Photonic-assisted radio frequency waveform generation for high-range resolution microwave radar

Wenrui Zhang, Changqing Cao, Xiaodong Zeng, Zhejun Feng

Author Affiliations +

Funded by: Fundamental Research Funds for the Central Universities, Major Instruments of The Ministry of Science and Technology, 111 project, The 111 Project

Optical Engineering, Vol. 57, Issue 11, 114103 (November 2018). https://doi.org/10.1117/1.OE.57.11.114103

Abstract

In modern radar systems, the target to achieve high-range resolution poses a high requirement on bandwidth and stability of probe radio frequency (RF) waveforms. We experimentally demonstrate the generation of RF waveforms with a low bandwidth electrical instrument and optical bandwidth multiplication method. Based on the high-order modulation-sideband of electro-optic modulators, wideband optical swept waveforms are generated from narrow band RF swept waveforms with a bandwidth multiplication factor of eight. By heterodyne beating the swept waveforms with a single tone frequency driven on the same dual-drive Mach–Zehnder modulator, we generate coherent wideband RF waveforms with linearly, V-shaped, and quadric frequency modulation, respectively. These waveforms exhibit high time-bandwidth products up to 2560 and high phase-noise performance. The utility of these generated RF waveforms for ranging radar system has been proven a pulse compression process.

Citation Download Citation

Wenrui Zhang, Changqing Cao, Xiaodong Zeng, and Zhejun Feng "Photonic-assisted radio frequency waveform generation for high-range resolution microwave radar," Optical Engineering 57(11), 114103 (15 November 2018). https://doi.org/10.1117/1.OE.57.11.114103

Received: 1 August 2018; Accepted: 15 October 2018; Published: 15 November 2018

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