Harold Allan Simpson

Title: Harold Allan Simpson: Innovator in Electromagnetic Shielding and Amplifier Linearization

Introduction

Harold Allan Simpson is a notable inventor based in Andover, MA (US), recognized for his contributions to the fields of electromagnetic shielding and amplifier linearization. With a total of three patents to his name, Simpson has made significant advancements that enhance the performance and reliability of electronic systems.

Latest Patents

One of Simpson's latest patents is an "Apparatus and method for electromagnetic shielding." This innovative system includes one or more electrically conductive gaskets placed between electronic circuit cards in a card rack. The conductive gaskets are affixed to circuit cards to form a conductive shield at the end of the card rack nearest the door of the cabinet in which the card racks are mounted. Each circuit card within a rack has a gasket that fills the space between the faceplates of two adjacent circuit cards, effectively reducing electromagnetic interference.

Another significant patent is the "Method for adaptively controlling amplifier linearization devices." This method linearizes amplifiers by measuring the intermodulation products at the output of the linearized amplifier using minimal additional hardware. This approach avoids the performance issues associated with pilot tones. In one embodiment, performance monitoring radios are utilized to measure the signal levels of intermodulation products in unused communication channels. These measurements are then used to adaptively linearize the amplifiers, thereby reducing the levels of intermodulation products.

Career Highlights

Harold Allan Simpson has had a distinguished career, working at Lucent Technologies Inc., where he has been able to apply his innovative ideas and technical expertise. His work has contributed to advancements in telecommunications and electronic systems, making a lasting impact in the industry.

Collaborations

Throughout his career, Simpson has collaborated with notable colleagues, including James Russell Blodgett and Michael W. Goodwin. These collaborations have fostered an environment of innovation and have led to the development of groundbreaking technologies.

Conclusion

Harold Allan Simpson's contributions to electromagnetic shielding and amplifier linearization demonstrate his commitment to innovation and excellence in engineering. His patents reflect a deep understanding of electronic systems and a dedication to improving their performance.