John P Watjen

Title: John P Watjen: Innovator in Composition Monitoring and Modulation Technologies

Introduction

John P Watjen is a notable inventor based in Sunnyvale, CA, with a focus on advanced technologies in composition monitoring and modulation. He holds a total of 3 patents, showcasing his contributions to the field of engineering and technology.

Latest Patents

One of his latest patents is titled "Composition monitor and monitoring process using impedance measurements." This invention utilizes radio frequency bridge techniques to parameterize the complex dielectric properties of various materials, including solids, liquids, gases, and their mixtures. The method allows for continuous or batch monitoring of these materials in an electrically isolated, physically open structure. It measures the composition of multicomponent process streams flowing in pipes or ducts by using the pipe as a waveguide for propagating radio frequency electromagnetic energy. The dielectric measurement is conducted in a flow-through test section, which induces interference patterns at characteristic frequencies to determine the dielectric constant and, consequently, the mixture composition. Additionally, a density measurement is provided for three-component streams such as oil, water, and gas, with temperature and pressure corrections applied to ensure accuracy.

Another significant patent is the "Resonant cavity optical modulator." This invention describes a phase-matched resonant waveguide modulator designed for very high frequency modulation, suitable for applications like FM laser spectroscopy. The design of the crystal modulator section is optimized for high frequencies, achieving optical and RF phase velocity matching. The waveguide's structure includes air in opposite end sections, allowing for ease of optical coupling.

Career Highlights

Throughout his career, John P Watjen has worked with prominent organizations, including the Electric Power Research Institute and SRI International. His work has significantly impacted the fields of electrical engineering and materials science.

Collaborations

John has collaborated with notable colleagues such as Scott G Gaisford and Bjorn G Bjornsen, contributing to various innovative projects and advancements in technology.

Conclusion

John P Watjen's contributions to the fields of composition monitoring and modulation technologies highlight his innovative spirit and dedication to engineering excellence. His patents reflect a commitment to advancing technology and improving processes across various industries.