Mr. Charles Harrity Profile

Charles Harrity

at Phase Sensitive Innovations Inc

SPIE Involvement:

Author

Publications (8)

Proceedings Article | 13 March 2024 Presentation

Multicore asymmetric star-routing (MASTR) switch

Janusz Murakowski, Timothy Creazzo, Chase Stine, Charles Harrity, Anna Bortle, Kevin Shreve, Samhit Dontamsetti, Dennis Prather

Proceedings Volume PC12891, PC1289104 (2024) https://doi.org/10.1117/12.3002091

KEYWORDS: Circuit switching, Phased array optics, Waveguides, Stars, Radio optics, Photonic integrated circuits, Integrated optics, Optical switching, Matrix multiplication, Switches

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Proceedings Article | 7 May 2021 Presentation + Paper

Frequency modulated imaging radar using distributed frequency swept antennas

Shouyuan Shi, Andrew Wright, Daniel Mackrides, Jesse Semmel, Anna Bortle, Zion Aranda, Mathew Konkol, Charles Harrity

Proceedings Volume 11758, 117580B (2021) https://doi.org/10.1117/12.2591034

KEYWORDS: Antennas, Radar, Radar imaging, Phase shifts, Modulation, Manufacturing, Control systems, Transceivers, Systems modeling, Spatial resolution

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In this work a novel approach to collision avoidance radar is presented. Leveraging the chipsets currently in development for the automotive industry, with an operational band of 77 to 81 GHz a new frontend has been developed using a distributed frequency swept antenna. The frequency swept antenna is able to steer the beam based on the transmit frequency. Multiple sub-array elements are distributed across the bumper of a vehicle increasing the aperture size of the system for improved beam resolution, thereby leading to better system sensitivity. To this end, system modeling was implemented to study the tradeoff between system sensitivity or range and power, gain, antenna aperture size and number of sub-array elements. The sub-arrays were designed, optimized, manufactured, and characterized using a conformal, flexible, low loss high frequency Rogers 3003 material. The measured far field patterns of the developed antenna array demonstrated consistent angular steering characteristics of -4° to 8° over the frequency from 75 to 85GHz with minimum reflection. The developed sub-array elements are cascaded and then synchronized using electronically controlled, high resolution, wideband, low loss W-band phase shifters. To drive such a large distributed array, we also focused on the development of high-resolution or analog phase shifters with 360 degrees coverage from 77-81GHz. The phase shifter chip was designed based on three-vector method and manufactured by leveraging SiGe foundry run. RF integration of the fabricated chips along with the control circuit was also conducted to demonstrate fully phase control over the band of interest. The packaged antenna subarrays and phase shifters are integrated together to form a distributed array. Through synchronization, coherent operation of the system can be established, enhancing the angular resolution of the system. The developed antenna array will be integrated with a Frequency Modulated Continuous Wave (FMCW) transceiver for applications of automobile radars.

Proceedings Article | 15 May 2018 Paper

High fill factor RF aperture arrays for improved passive, real-time millimeter wave imaging

Thomas Dillon, Christopher Schuetz, Daniel Mackrides, Andrew Wright, Kevin Shreve, Charles Harrity, Stephen Kocazik, Shouyuan Shi, Peng Yao, Dennis Prather

Proceedings Volume 10642, 106420U (2018) https://doi.org/10.1117/12.2304869

KEYWORDS: Extremely high frequency, Imaging systems, Sensors, Point spread functions, Upconversion, Driver's vision enhancers, Diffraction, Signal attenuation, Receivers, Millimeter wave imaging

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Proceedings Article | 12 May 2016 Paper

Module integration and amplifier design optimization for optically enabled passive millimeter-wave imaging

Andrew Wright, Richard Martin, Christopher Schuetz, Shouyuan Shi, Yifei Zhang, Peng Yao, Kevin Shreve, Thomas Dillon, Daniel Mackrides, Charles Harrity, Dennis Prather

Proceedings Volume 9830, 98300C (2016) https://doi.org/10.1117/12.2229088

KEYWORDS: Optical amplifiers, Imaging systems, Amplifiers, Receivers, Imaging systems, Optical amplifiers, Liquid crystals, Polymers, Upconversion, Digital electronics, Signal attenuation, Antennas

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Proceedings Article | 21 May 2015 Paper

Passive, real-time millimeter wave imaging for degraded visual environment mitigation

Thomas Dillon, Christopher Schuetz, Richard Martin, Daniel Mackrides, Shouyuan Shi, Peng Yao, Kevin Shreve, Charles Harrity, Dennis Prather

Proceedings Volume 9471, 947103 (2015) https://doi.org/10.1117/12.2177356

KEYWORDS: Extremely high frequency, Imaging systems, Sensors, Signal attenuation, Millimeter wave imaging, Visualization, Upconversion, Driver's vision enhancers, Signal detection, Image processing

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Proceedings Article | 19 May 2015 Paper

Real-time image processing for passive mmW imagery

Stephen Kozacik, Aaron Paolini, James Bonnett, Charles Harrity, Daniel Mackrides, Thomas Dillon, Richard Martin, Christopher Schuetz, Eric Kelmelis, Dennis Prather

Proceedings Volume 9462, 94620L (2015) https://doi.org/10.1117/12.2177395

KEYWORDS: Extremely high frequency, Signal to noise ratio, Imaging systems, Visible radiation, Photonics, Fiber optic gyroscopes, Image resolution, Infrared imaging, Image processing, Video acceleration

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Proceedings Article | 19 May 2015 Paper

Video rate passive millimeter-wave imager utilizing optical upconversion with improved size, weight, and power

Richard Martin, Shouyuan Shi, Yifei Zhang, Andrew Wright, Peng Yao, Kevin Shreve, Christopher Schuetz, Thomas Dillon, Daniel Mackrides, Charles Harrity, Dennis Prather

Proceedings Volume 9462, 946209 (2015) https://doi.org/10.1117/12.2177133

KEYWORDS: Imaging systems, Upconversion, Optical amplifiers, Extremely high frequency, Antennas, Waveguides, Video, Packaging, Liquid crystals, Polymers

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Proceedings Article | 31 May 2013 Paper

Realization of a video-rate distributed aperture millimeter-wave imaging system using optical upconversion

Christopher Schuetz, Richard Martin, Thomas Dillon, Peng Yao, Daniel Mackrides, Charles Harrity, Alicia Zablocki, Kevin Shreve, James Bonnett, Petersen Curt, Dennis Prather

Proceedings Volume 8715, 87150I (2013) https://doi.org/10.1117/12.2016138

KEYWORDS: Imaging systems, Upconversion, Extremely high frequency, Antennas, Sensors, Image processing, Near field optics, Cameras, Optical scanning systems, Control systems

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Showing 5 of 8 publications

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