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 +

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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