Title
220-GHz imaging radar with 1-Hz frame rate using an array of homodyne transceivers
Author
Bryllert, T.
Svedin, J.
Karlsson, M.
Gandini, E.
Llombart, N.
Drakinskiy, V.
Stake, J.
Contributor
Wikner, D.A. (editor)
Robertson, D.A. (editor)
Publication year
2018
Abstract
We present a 220 GHz imaging radar prototype that has been developed in the European Defense Agency (EDA) project TIPPSI. The purpose of the development was to demonstrate short-range high-resolution 3D imaging for security applications at checkpoints, and to guide the development of stand-off real-time millimeter wave and sub-millimeter wave imaging systems for detection of larger objects at greater distances. An additional goal was to experimentally verify simulation techniques for active (sub)-mmw imaging systems, the verified simulation techniques can then be used to explore different system architectures. The 220 GHz imaging radar prototype consist of a flexible, mechanically scanned optical system that can support linear arrays of transmit/receive (TxRx) units up to 150 mm in length. The optical system is divided into two parts: A compact Dragonian system including the mechanical scanner that can be used as a stand-alone imager at reduced target distance and resolution, and a confocal system that can be added to achieve the full resolution of 1 cm x 1 cm x 1 cm at 4.5 m target distance. The field of view of the full resolution system is 70 cm x 70 cm. The front-end is currently populated by 4 TxRx units that are sparsely distributed along the 150 mm focal plane. The TxRx units operate in frequency modulated continuous wave (FMCW) mode and have a bandwidth of 24 GHz. Each TxRx unit use a single horn antenna and the transmit- A nd receive signals are generated and received using the same circuits which avoids the need of a duplexer. We will demonstrate high resolution 3D videos taken at 1 Hz frame rate and compare the individual images with simulations using electromagnetic simulators and character/clothes animation. © 2018 SPIE. The Society of Photo-Optical Instrumentation Engineers (SPIE)
Subject
Radar
FMCW
Millimeter waves
THz electronics
Electromagnetic simulation
Frequency modulation
Horn antennas
Image resolution
Imaging systems
Imaging techniques
Millimeter waves
Object detection
Optical systems
Radar
Real time systems
Scanning
Submillimeter waves
Terahertz waves
European defense agencies
Frequency-modulated continuous waves
Security application
Simulation technique
System architectures
Radar imaging
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http://resolver.tudelft.nl/uuid:5b6e46be-1700-43a0-a4df-8031db5e0b7d
TNO identifier
842144
Publisher
SPIE
ISBN
9781510617797
ISSN
0277-786X
Source
Passive and Active Millimeter-Wave Imaging XXI 2018. 18 April 2018 through 19 April 2018, 10634
Series
Proceedings of SPIE - The International Society for Optical Engineering
Article number
1063405
Document type
conference paper