Location History:
- St. Albans, GB (1989)
- Hertfordshire, GB (1992)
Company Filing History:
Years Active: 1989-1992
Title: The Innovations of David W Joynson
Introduction
David W Joynson is a notable inventor based in Hertfordshire, GB. He has made significant contributions to the field of radar technology, holding two patents that showcase his innovative approach to solving complex problems in this domain.
Latest Patents
One of Joynson's latest patents is a radar system employing an injection locked transmitter stage. This invention involves a radar transmitter chain that utilizes an injection locked oscillator, such as a magnetron, as an output stage. The challenge lies in maintaining the injection locking bandwidth centered on the radar source transmit frequency. Joynson's design allows the magnetron's free running frequency to drift, along with its injection locking bandwidth, while ensuring that the radar source frequency follows the magnetron frequency. A phase difference measurement between the injection signal and the magnetron output signal provides the control for a feedback loop that may regulate a tunable VCO or select from a bank of fixed frequency oscillators.
Another significant patent is the pulse doppler radar system, which addresses the issue of interference between friendly pulse doppler radars targeting common or adjacent targets. Despite considerable separation of the radar RFs, pulsed signals can be misinterpreted by another radar as a doppler-shifted echo. Joynson's solution involves frequency modulating the RF transmission at a very low cycle rate, which helps indicate to receiving radars that the source could not be a target accelerating at such a high rate.
Career Highlights
David W Joynson is associated with The Marconi Company Limited, where he has been able to apply his expertise in radar technology. His work has contributed to advancements in radar systems, enhancing their functionality and reliability.
Collaborations
Throughout his career, Joynson has collaborated with notable colleagues, including Michael A Jones and Ian J White. These collaborations have likely fostered an environment of innovation and shared knowledge, further enhancing the impact of their work in the field.
Conclusion
David W Joynson's contributions to radar technology through his patents demonstrate his innovative spirit and problem-solving capabilities. His work continues to influence advancements in radar systems, showcasing the importance of creativity in engineering.