Company Filing History:
2 out of 102 
1 out of 832,880 Years Active: 1992-2002
Title: The Innovations of John I Upshur
Introduction
John I Upshur is a notable inventor based in Germantown, MD (US), recognized for his contributions to the field of telecommunications and signal processing. With a total of three patents to his name, Upshur has made significant advancements that enhance the quality and efficiency of satellite communications.
Latest Patents
One of Upshur's latest patents is titled "Asymmetric response bandpass filter having resonators with minimum couplings." This invention involves asynchronously-tuned coupled resonator cavities that utilize a minimal set of inter-resonator couplings. The design allows for the creation of 8 order filter topologies that achieve three transmission zeros without cross-couplings, relying solely on eight series and/or parallel couplings. Another significant patent is "Low noise front-end blanking and interleaving for satellite reception." This method and apparatus improve digital transmissions to satellite terminals operating near radar sources. It combines interleaving channel symbols at a land station before RF signal transmission, enhancing the satellite's Effective Isotropic Radiated Power (EIRP) to counteract radar interference. The system detects radar pulses and blanks the received RF signal during the radar's ON time, ensuring that satellite terminals maintain high-quality service despite the presence of radar systems.
Career Highlights
Throughout his career, John I Upshur has worked with Comsat Corporation, where he contributed to various innovative projects in satellite communications. His expertise in signal processing and telecommunications has positioned him as a valuable asset in the industry.
Collaborations
Upshur has collaborated with notable professionals such as Donald Stuart Arnstein and Francois T Assal, further enriching his work and contributions to the field.
Conclusion
John I Upshur's innovative patents and career achievements reflect his dedication to advancing satellite communication technologies. His work continues to influence the industry, ensuring improved service quality in challenging environments.