Company Filing History:
Years Active: 1992-2018
Title: Innovations of Kaichiang Chang
Introduction
Kaichiang Chang is a prominent inventor based in Northborough, MA, known for his significant contributions to radar technology. With a total of 16 patents to his name, he has made remarkable advancements in the field, particularly while working at Raytheon Company.
Latest Patents
Chang's latest patents include a Sequential Multi-Beam Radar for Maximum Likelihood Tracking and Fence Search. This innovative radar system employs multiple-beam maximum likelihood estimation (MLE) during both search and tracking operations. During the search phase, a four-beam sequential cluster is utilized to locate targets within a designated region of interest. For tracking, a three-beam triad is employed to monitor one or more detected targets. Additionally, a beam selector switch may be incorporated to allow two offset receive beams to time-share a beamformer output port, facilitating the generation of the four-beam sequential cluster.
Another notable patent is the Ship-Based Over-the-Horizon Radar. This system provides mobile, persistent, wide-area air and ship surveillance across vast ocean expanses, particularly in anti-access/area denial (A2AD) environments. The transmit ship is equipped with a log-periodic antenna (LPA) array designed for maritime use, while the receive ship features multiple monopole or dipole whip antennas. The transmit/receive antenna is complemented by a ground screen, which is sized considering the sea as a naturally reflective surface. The system also incorporates advanced software to compensate for ship movement, and synthetic aperture radar (SAR) techniques are utilized to enhance the effective size of the radar receiver aperture. The modular design allows for rapid deployment and stowage of radar equipment using standard commercial container ships and shipping containers.
Career Highlights
Throughout his career, Kaichiang Chang has demonstrated exceptional expertise in radar technology, contributing to various innovative projects at Raytheon Company. His work has significantly impacted the field, enhancing surveillance capabilities and operational efficiency.
Collaborations
Chang has collaborated with notable colleagues, including Jack J Schuss and Jeffrey C Upton, further enriching his contributions to radar technology.
Conclusion
Kaichiang Chang's innovative work in radar technology has led to significant advancements in surveillance systems. His patents reflect a commitment to enhancing operational capabilities in challenging environments.
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