Company Filing History:
Years Active: 1980-1990
Title: Roland Allezard: Innovator in Radar Technology
Introduction
Roland Allezard is a notable inventor based in Verrieres le Buisson, France. He has made significant contributions to the field of radar technology, holding a total of 4 patents. His work focuses on advanced radar systems that enhance measurement accuracy and mapping capabilities.
Latest Patents
One of Allezard's latest patents is a frequency-modulated continuous-wave radar altimeter system. This innovative radar system transmits a wave with a virtually linear frequency between two frequencies, f.sub.1 and f.sub.2. It supplies a first beat signal (Fb.sub.1) between transmitted and received waves, which is suitable for measuring altitude by assessing overall phase rotation. The radar also generates a second beat signal (Fb.sub.2) in quadrature with the first signal. The digitized signals are compared to calculate the altitude, which is proportional to the number of zero crossings in a predetermined direction.
Another significant patent is a radar apparatus designed to create a radio map of a site. This FM-CW type sensor includes a transceiver aerial that is rigidly attached to the sensor's support. It radiates a frequency of several GHz in a nearly linear sawtooth pattern, generating a beat signal (F.sub.b) between transmitted and received waves. The system incorporates analog processing circuits, digitizing means, and digital processing capabilities to transform time-division samples into frequency-division samples, effectively mapping distances on a pixel-based map.
Career Highlights
Roland Allezard is currently employed at U.S. Philips Corporation, where he continues to innovate in radar technology. His work has significantly advanced the capabilities of radar systems, making them more efficient and accurate.
Collaborations
Throughout his career, Allezard has collaborated with notable colleagues, including Jean-Luc Degouy and Serge Paturel. These collaborations have contributed to the development of cutting-edge radar technologies.
Conclusion
Roland Allezard is a distinguished inventor whose work in radar technology has led to multiple patents and advancements in the field. His contributions continue to influence the development of innovative radar systems.