Donald K Alexander

Title: Innovations of Donald K. Alexander

Introduction

Donald K. Alexander is a notable inventor based in Ellicott City, MD (US). He has made significant contributions to the field of semiconductor technology, particularly in the development of advanced antenna systems. With a total of three patents to his name, his work has had a profound impact on various applications, including military and space technologies.

Latest Patents

One of Alexander's latest patents is for mitered mechanical switches. This invention presents an improved phased-array active antenna transmit-receive means that utilizes a multiplicity of individual transmit-receive cells positioned in an array format upon a common wafer of semiconductor material. Each transmit-receive cell comprises a multiplicity of redundant, integrated circuit electronic devices implanted upon the common semiconductor substrate. The novel mitered mechanical switches permanently interconnect individual electronic devices into either transmit or receive circuits during the fabrication and testing of the transmit-receive cells. Additionally, radio frequency and direct current input and output vias formed from a novel metal evaporation technique connect the devices on the surface of the common semiconductor wafer to underlying, insulated direct current distribution circuits and a radio frequency manifold. This array results in a significant reduction in the size and weight of the standard phased-array active antenna system, which is crucial for broadband electronic countermeasure systems or narrowband phased array active antenna radar systems used in advanced tactical fighters or space applications.

Another patent focuses on the process for producing vias in semiconductor technology. Similar to his previous invention, it utilizes a multiplicity of individual transmit-receive cells positioned in an array format upon a common wafer of semiconductor material. The improvements in this patent also contribute to the reduction in size and weight of antenna systems, enhancing their effectiveness in various applications.

Career Highlights

Donald K. Alexander is currently associated with Westinghouse Electric Corporation, where he continues to innovate and develop cutting-edge technologies. His work has been instrumental in advancing the capabilities of phased-array active antenna systems, making them more efficient and effective for modern applications.

Collaborations

Throughout his career, Alexander has collaborated with notable colleagues, including Harvey C. Nathanson and Michael C. Driver. These collaborations have further enriched his work and contributed to the success of his inventions.

Conclusion

Donald K. Alexander's contributions to the field of semiconductor technology and antenna systems are noteworthy. His innovative patents and ongoing work at West