David A Whelan

Title: The Innovative Contributions of David A. Whelan

Introduction

David A. Whelan is a notable inventor based in Chatsworth, CA (US), recognized for his significant contributions to technology through his six patents. His work primarily focuses on advanced imaging systems and frequency selective surfaces, showcasing his expertise in engineering and innovation.

Latest Patents

One of Whelan's latest patents is the Correlation Radiometer Imaging System. This passive imaging system utilizes an antenna with two elements that cross-correlate received signals with a reference function to achieve high resolution. The design includes rectangular antenna elements oriented normal to the vehicle's longitudinal axis, separated by a distance that meets image resolution requirements. The system features frequency scanning in the cross-track dimension and employs a time delay between the forward and rear antenna elements to achieve precise pointing. The outputs of the antenna elements are processed to provide in-phase and quadrature components, which are then digitally filtered to enhance resolution.

Another significant patent is the Ferro-electric Frequency Selective Surface Radome. This invention involves radomes with voltage-controlled dielectric layers that allow for the optimization of frequency and angular response. By varying the dielectric properties, the passband frequency can be adjusted, enhancing the performance of the radomes. The design includes grating screens with printed radiating elements and voltage control circuitry that actively varies the dielectric permittivity, improving the radome's functionality.

Career Highlights

Throughout his career, David A. Whelan has worked with prominent companies such as Hughes Aircraft Company and Hughes Electronics Corporation. His experience in these organizations has contributed to his development as an inventor and innovator in the field of technology.

Collaborations

Whelan has collaborated with notable individuals in his field, including John Fraschilla and Brian M. Pierce. These collaborations have likely enriched his work and contributed to the advancements in his patented technologies.

Conclusion

David A. Whelan's innovative contributions to imaging systems and frequency selective surfaces highlight his expertise and dedication to advancing technology. His patents reflect a commitment to enhancing performance and resolution in various applications.