Joseph A Preiss

Title: Joseph A Preiss: Innovator in Photonic Radar Systems

Introduction

Joseph A Preiss is a notable inventor based in Westford, MA (US), recognized for his contributions to the field of radar technology. With a total of 8 patents, he has made significant advancements in photonic radar systems, showcasing his expertise and innovative spirit.

Latest Patents

Among his latest patents, the "Photonically Controlled Active Array Radar System" stands out. This invention involves an active array radar system that is controlled by photonic signals. The array consists of N antenna elements divided into M subarrays, each containing N/M antenna elements. Tunable lasers provide M optical wavelengths within non-overlapping bands. For transmission, a microwave transmit pulse is amplitude modulated onto the M optical signals. Time delays are introduced for offsets between elements in a subarray and between subarrays. By utilizing wavelength division multiplexing, each antenna element on the array achieves a true time delay.

Another significant patent is the "Reactive Combiner for Active Array Radar System." Similar to his previous work, this system is also controlled by photonic signals. The array is divided into M subarrays, with each subarray receiving microwave signals that are optically modulated onto a single fiber. Time delays are again introduced for offsets, ensuring that a true time delay is attributed to each antenna element. A non-coherent optical combiner with an array of N photodetectors demodulates the received signals, recovering the coherent sum of the RF signals.

Career Highlights

Joseph A Preiss has had a distinguished career, working with prominent companies such as Raytheon Company and Raytheon Corporation. His experience in these organizations has allowed him to develop and refine his innovative ideas in radar technology.

Collaborations

Throughout his career, Joseph has collaborated with talented individuals, including Leon Green and Fernando Beltran. These partnerships have contributed to the success of his projects and the advancement of radar technology.

Conclusion

Joseph A Preiss is a pioneering inventor whose work in photonic radar systems has significantly impacted the field. His innovative patents and collaborations reflect his dedication to advancing technology and improving radar systems.