Beam resolution analysis of a 340 GHz radar using acoustic levitation

Okan Yurduseven; Ken Cooper; Goutam Chattopadhyay

doi:10.1117/12.2518727

13 May 2019 Beam resolution analysis of a 340 GHz radar using acoustic levitation

Okan Yurduseven, Ken Cooper, Goutam Chattopadhyay

Proceedings Volume 10994, Passive and Active Millimeter-Wave Imaging XXII; 1099406 (2019) https://doi.org/10.1117/12.2518727
Event: SPIE Defense + Commercial Sensing, 2019, Baltimore, MD, United States

Abstract

Conventionally, resolution characterization of an imaging radar is performed by means of analyzing the diffraction limited point-spread-function (PSF) pattern of the radar. Such an analysis is straightforward and can easily be implemented at microwave and millimeter-wave frequencies using simple point-scatter targets. However, it poses significant challenges at submillimeter-wave (or THz) frequencies due to the strong scattering response of secondary objects that are used to align the PSF targets for imaging at these frequencies. As a result, the reconstructed PSF patterns suffer from artifacts caused by the secondary objects present in the background. In this work, we present the use of the acoustic levitation principle to obtain the PSF characterization of a 340 GHz stand-off imaging radar. We show that using a water droplet acoustically levitated at the focal point of the 340 GHz imaging radar, high-fidelity PSF characterization of the radar is achieved, revealing the resolution limits of the radar while exhibiting good signal-to-noise ratio (SNR).

Citation Download Citation

Okan Yurduseven, Ken Cooper, and Goutam Chattopadhyay "Beam resolution analysis of a 340 GHz radar using acoustic levitation", Proc. SPIE 10994, Passive and Active Millimeter-Wave Imaging XXII, 1099406 (13 May 2019); https://doi.org/10.1117/12.2518727

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KEYWORDS

Radar

Radar imaging

Antennas

Point spread functions

Imaging systems

Microwave radiation

Acoustics

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