Multistatic Terahertz Imaging Using the Radon Transform

Panagiotis C. Theofanopoulos, Mahmoud Sakr, Georgios Trichopoulos

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

We present a novel imaging method for compact, low-profile imagers in millimeter wave (mmW) and terahertz (THz) frequencies. The method borrows the principles of computerized tomography (CT) to generate 2D or 3D high-resolution images using simplified RF-front-ends. To perform imaging the proposed scheme implements the projection-slice theorem. Specifically, it records the Radon Transform (RT) of the desired field of view (FOV) and reconstructs the image using the Fourier Slice Theorem. To achieve the illumination of the FOV the proposed imaging configuration uses a rotating linear antenna array that produces a highly directive fan-beam. The antenna elements are further reduced using multistatic sparse array techniques without compromising the image reconstruction process. By reducing dramatically the number of active elements, the new method could allow high-resolution mmW/THz imaging systems to be embedded in low-profile and lightweight platforms, including, unmanned aerial vehicles (UAVs) or CubeSats. In this paper, we present the basic concept of the novel imaging scheme and simulation results verifying the proof of concept. Finally, we present a modified imaging antenna array that alleviates interference from objects and sources outside the FOV.

Original languageEnglish (US)
JournalIEEE Transactions on Antennas and Propagation
DOIs
StateAccepted/In press - Jan 1 2019

Keywords

  • arrays
  • Computed tomography
  • Image reconstruction
  • imaging
  • Linear antenna arrays
  • multistatic
  • Radar imaging
  • Radon
  • Radon Transform
  • Terahertz

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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