Christopher John White

Title: Innovations of Christopher John White

Introduction

Christopher John White is a notable inventor based in Palo Alto, California. He holds a total of 10 patents, showcasing his significant contributions to the field of technology and engineering. His work primarily focuses on advanced measurement techniques and innovative filtering solutions.

Latest Patents

One of his latest patents is a method and apparatus for in-situ measurement of soot by electron spin resonance (ESR) spectrometry. This invention involves an instrument and method that utilizes electron spin resonance spectrometry to measure the concentration of airborne soot particles. The system continuously passes a sample of exhaust gas through a resonating RF microwave cavity resonator while applying a uniform, slowly varying magnetic field. This setup allows for the measurement of phase or amplitude modulation to derive an electron spin resonance signal, which directly senses the concentration of carbon free radicals produced during inefficient combustion. This invention also includes feedback control mechanisms for optimizing engine or boiler parameters to minimize particulate matter emissions.

Another significant invention by White is a miniature tunable filter. This device comprises at least two adjacent coaxial-type resonators that are coupled together. Each resonator features a metal-coated ceramic dielectric cavity with a tuning rod passage. By inserting a tuning rod through this passage, the filter can be tuned effectively. The design includes a low impedance coaxial section that creates an effective microwave short-circuit at the resonant frequency, resulting in wide tuning capabilities and low insertion loss. The combination of a solid metal tuning rod with a ceramic resonator enhances radio frequency power handling.

Career Highlights

Throughout his career, Christopher John White has worked with several prominent organizations, including Active Spectrum, Inc. and the California Institute of Technology. His experience in these institutions has contributed to his innovative work and the development of his patents.

Collaborations

White has collaborated with notable individuals in his field, including James Robert White and Colin T. Elliott. These partnerships have likely enriched his research and development efforts.

Conclusion

Christopher John White's contributions to technology through his patents and innovations demonstrate his expertise and commitment to advancing engineering solutions. His work continues to impact various industries, particularly in improving combustion efficiency and developing advanced filtering technologies.