Company Filing History:
Years Active: 1977-1988
Title: James K. Shimizu: Innovator in Microwave Technology
Introduction
James K. Shimizu is a notable inventor based in Palos Verdes Estates, California. He has made significant contributions to the field of microwave technology, holding a total of 3 patents. His work focuses on developing innovative solutions that enhance the performance and efficiency of microwave systems.
Latest Patents
One of Shimizu's latest patents is a microwave attenuator. This invention is a high-performance, low-cost variable attenuator designed with minimal size and weight requirements. The variable microwave attenuator includes a microwave stripline transmission line connecting the input and output. It features first and second ground planes on opposite sides of the transmission line, along with a dielectric card that has a metallization pattern. This card is adapted for variable interposition between the transmission line and the first ground plane, allowing for variable attenuation of microwave energy. A specific aspect of this invention involves the design of the metallization pattern to provide vernier attenuation.
Another significant patent by Shimizu is a thermally compensated microwave resonator. This invention addresses thermal compensation for frequency control of microwave resonators by utilizing bimetallic boundary motion type phenomena. The resonator is rectangular and preferably has composite broad walls made of integral layers. One layer has a relatively lower thermal expansion coefficient than the other, and each layer has an initial deformation in a stabilized curvature condition, rendering these walls frequency sensitive.
Career Highlights
James K. Shimizu has had a distinguished career, working at Hughes Aircraft Company. His role at this prominent organization has allowed him to contribute to various innovative projects in microwave technology.
Collaborations
Throughout his career, Shimizu has collaborated with notable colleagues, including Richard V. Basil, Jr. and Leons Ondrups. These collaborations have further enriched his work and contributed to advancements in the field.
Conclusion
James K. Shimizu is a prominent inventor whose work in microwave technology has led to significant advancements. His innovative patents reflect his commitment to enhancing the performance of microwave systems.