Company Filing History:
6 out of 8,187 
1 out of 16,080 Years Active: 1976-1989
Title: The Innovations of Robert Harper
Introduction
Robert Harper is a notable inventor based in Concord, MA (US), recognized for his contributions to the field of waveguide technology. With a total of seven patents to his name, Harper has made significant advancements in the design and manufacturing of slow-wave structures.
Latest Patents
One of Harper's latest patents is the "Helical waveguide to rectangular waveguide coupler." This invention involves the formation of slow-wave structures in the form of helical or coupled-cavity structures. A helical waveguide is created from a solid rod of copper, which is machined with a deep, narrow helical groove. A copper sleeve is then brazed to the periphery of the helical thread, forming a helically spiraling pathway around a solid, axially centered portion. The center portion is subsequently eroded away to create a slow-wave structure with a helical radially-extending portion. If only partially eroded, an inner helical axially-extending ridge is formed, providing a helical axially-centered gap between adjacent ridges. The helix extends into a rectangular waveguide, facilitating the coupling of the slow-wave structure to the source and load. Additionally, the coupled-cavity forms of waveguide slow-wave structures are produced by machining disks from a solid rod of copper, which are then brazed inside a cylindrical shell of copper.
Career Highlights
Throughout his career, Robert Harper has worked with prominent organizations, including Raytheon Company and the United States Navy. His work has significantly impacted the field of waveguide technology, showcasing his expertise and innovative spirit.
Collaborations
Harper has collaborated with notable colleagues such as Joseph L Rousseau and Cheryl V Liss, contributing to various projects and advancements in technology.
Conclusion
Robert Harper's innovative work in waveguide technology and his numerous patents highlight his significant contributions to the field. His inventions continue to influence advancements in slow-wave structures and waveguide applications.