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Appl. Sci. 2017, 7(9), 933; doi:10.3390/app7090933

Measurement Matrix Analysis and Radiation Improvement of a Metamaterial Aperture Antenna for Coherent Computational Imaging

Key Laboratory of High Speed Circuit Design and EMC of Ministry of Education, School of Electronic Engineering, Collaborative Innovation Center of Information Sensing and Understanding, Xidian University, Xi’an 710071, China
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Received: 26 July 2017 / Revised: 18 August 2017 / Accepted: 7 September 2017 / Published: 12 September 2017
(This article belongs to the Special Issue Metasurfaces: Physics and Applications)
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Abstract

A metamaterial aperture antenna (MAA) that generates frequency-diverse radiation field patterns has been introduced in the context of microwave wave imaging to perform compressive image reconstruction. This paper presents a new metamateriapl aperture design, which includes two kinds of metamaterial elements with random distribution. One is a high-Q resonant element whose resonant frequency is agile, and the other one is a low-Q element that has a high radiation efficiency across frequency band. Numerical simulations and measurements show that the radiation efficiency of up to 60% can be achieved for the MAA and the far-field patterns owns good orthogonality, when using the complementary electric-field-coupled (CELC) element and the complementary Jerusalem cross (CJC) element with a random distribution ratio of 4 to 1, which could be effectively used to reconstruct the target scattering scene. View Full-Text
Keywords: agile frequency response; compressive image reconstruction; metamaterial aperture antenna agile frequency response; compressive image reconstruction; metamaterial aperture antenna
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Kou, N.; Li, L.; Tian, S.; Li, Y. Measurement Matrix Analysis and Radiation Improvement of a Metamaterial Aperture Antenna for Coherent Computational Imaging. Appl. Sci. 2017, 7, 933.

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