Regular Articles

Radar imaging using electromagnetic wave carrying orbital angular momentum

[+] Author Affiliations
Tiezhu Yuan, Yongqiang Cheng, Hongqiang Wang, Yuliang Qin, Bo Fan

National University of Defense Technology, School of Electronic Science and Engineering, Changsha, China

J. Electron. Imaging. 26(2), 023016 (Apr 05, 2017). doi:10.1117/1.JEI.26.2.023016
History: Received June 15, 2016; Accepted March 20, 2017
Text Size: A A A

Abstract.  The concept of radar imaging based on orbital angular momentum (OAM) modulation, which has the ability of azimuthal resolution without relative motion, has recently been proposed. We investigate this imaging technique further in greater detail. We first analyze the principle of the technique, accounting for its resolving ability physically. The phase and intensity distributions of the OAM-carrying fields produced by phased uniform circular array antenna, which have significant effects on the imaging results, are investigated. The imaging model shows that the received signal has the form of inverse discrete Fourier transform with the use of OAM and frequency diversities. The two-dimensional Fourier transform is employed to reconstruct the target images in the case of large and small elevation angles. Due to the peculiar phase and intensity characteristics, the small elevation is more suitable for practical application than the large one. The minimum elevation angle is then obtained given the array parameters. The imaging capability is analyzed by means of the point spread function. All results are verified through numerical simulations. The proposed staring imaging technique can achieve extremely high azimuthal resolution with the use of plentiful OAM modes.

Figures in this Article
© 2017 SPIE and IS&T

Citation

Tiezhu Yuan ; Yongqiang Cheng ; Hongqiang Wang ; Yuliang Qin and Bo Fan
"Radar imaging using electromagnetic wave carrying orbital angular momentum", J. Electron. Imaging. 26(2), 023016 (Apr 05, 2017). ; http://dx.doi.org/10.1117/1.JEI.26.2.023016


Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

Advertisement
  • Don't have an account?
  • Subscribe to the SPIE Digital Library
  • Create a FREE account to sign up for Digital Library content alerts and gain access to institutional subscriptions remotely.
Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).
Access This Proceeding
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
Access This Chapter

Access to SPIE eBooks is limited to subscribing institutions and is not available as part of a personal subscription. Print or electronic versions of individual SPIE books may be purchased via SPIE.org.