Francis J Sullivan, Jr

Title: The Innovations of Francis J Sullivan, Jr.

Introduction

Francis J Sullivan, Jr. is a notable inventor based in Marlboro, MA (US). He has made significant contributions to the field of solid-state transmitters, particularly in the realm of radio frequencies. His innovative work has led to the development of a unique transmitter that enhances pulsed operation capabilities.

Latest Patents

Sullivan holds a patent for a transmitter that features outputs of a plurality of pulse modulated diodes. This improved solid-state transmitter is particularly well-suited for pulsed operation at radio frequencies. The invention includes a crystal-controlled oscillator that produces a continuous wave output signal, which ultimately determines the frequency of each transmitted pulse. The design incorporates a first oscillatory circuit with a resonant cavity and at least one coaxial oscillator that utilizes an IMPATT diode. Additionally, a second oscillatory circuit is included, featuring multiple coaxial oscillators, each also incorporating an IMPATT diode. The improved modulator periodically actuates all IMPATT diodes, ensuring that the pulsed output remains locked to the continuous wave signal from the crystal-controlled oscillator. Furthermore, the invention presents various configurations of coaxial oscillators that are easier to align and allows for a greater number of oscillators to be coupled to a resonant cavity than previously possible. An improved probe and tuning arrangement for the resonant cavity is also disclosed.

Career Highlights

Sullivan's career is marked by his work at Raytheon Company, where he has contributed to advancements in technology and innovation. His expertise in solid-state devices has positioned him as a key figure in the development of radio frequency transmitters.

Collaborations

Throughout his career, Sullivan has collaborated with notable colleagues, including George Jerinic and Glenn R Thoren. These collaborations have further enriched his contributions to the field of electronics and solid-state technology.

Conclusion

Francis J Sullivan, Jr. is a distinguished inventor whose work in solid-state transmitters has made a lasting impact on the field of radio frequencies. His innovative designs and collaborations continue to influence advancements in technology.