Experimental analysis of high resolution indoor THz SAR imaging

• Synthetic Aperture Radar (SAR) technology is most commonly used in the frequency span of sub-30 GHz which provides the spatial resolution in the range of sub-cm. This technology is being extended to higher frequencies such as millimeter wave and THz region to achieve higher resolution in the range of sub-mm. This expands the SAR applications for material characterization, classification and sub-mm localization. However, the region is suitable for short propagation distance such as an indoor environment. Therefore, to investigate the achieved resolution and quality of the SAR images at THz, an indoor SAR testbed based on vector network analyzer has been setup for the measurements. This paper explains the indoor SAR geometry and describes the associated testbed along with the system parameters. The measurements are performed at a centre frequency of 275 GHz with a bandwidth of 110 GHz. The measurement results are analyzed for the theoretical resolution with the Backprojection Algorithm and the findings are presented in this paper. The sub-mm spatial resolution imaging of two small size metallic objects are performed. © WSA 2020.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik -- Signalbehandling (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering -- Signal Processing (hsv//eng)

Nyckelord

Backprojection algorithm

High resolution imaging

Indoor radar

Millimeter wave

Radar imaging

Synthetic aperture radar

Terahertz imaging

Electric network analyzers

Image resolution

Millimeter waves

Terahertz waves

Testbeds

Backprojection algorithms

Experimental analysis

Higher frequencies

Indoor environment

Material characterizations

Short propagation

Spatial resolution

Vector network analyzers

Publikations- och innehållstyp

ref (ämneskategori)

kon (ämneskategori)