Company Filing History:
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1 out of 832,891 Years Active: 1993-1995
Title: **Innovative Contributions of Dirk M Hoekstra in High-Performance Filters**
Introduction
Dirk M Hoekstra, an inventor based in Los Altos, California, has made significant strides in the field of high-performance filtering technology. With a total of two patents to his name, his innovative designs demonstrate a profound understanding of ferrimagnetic materials and RF engineering.
Latest Patents
Dirk’s latest patents focus on YIG (Yttrium Iron Garnet) tuned high-performance filters. The first patent describes a nonreciprocal band reject and bandpass filter that operates within frequency ranges of 2-18 GHz and 6-18 GHz respectively. This invention utilizes ferrimagnetic spheres shielded in nonmagnetic, electrically conductive cavities. By employing full RF coupling loops, the design ensures that various factors affecting signal transmission, such as loop size and dielectric constant, align perfectly to create the desired electrical phase changes.
In his second patent, Hoekstra presents a YIG notch filter that is tunable to frequencies as high as 18 GHz. This innovative filter utilizes much smaller YIG spheres compared to previous designs. The spheres are arranged in a linear fashion within a nonmagnetic block, eliminating the need for impedance inverter components traditionally used in RF circuit designs.
Career Highlights
Throughout his career, Dirk Hoekstra has worked with prominent companies such as Litton Systems, Inc. His experience in these companies has contributed to his expertise in developing cutting-edge filtering technologies that push the boundaries of radio frequency applications.
Collaborations
Hoekstra has collaborated with notable individuals in the field, including William J Keane and Christopher F Schiebold. These partnerships have likely fostered an environment of innovation that has led to the development of his patented technologies.
Conclusion
Dirk M Hoekstra's contributions to the field of high-performance filters, particularly in the development of YIG tuned devices, showcase his innovative spirit and technical skill. His work not only enhances the performance of filtering systems but also reflects advancements in RF coupling techniques. As the demand for efficient and high-frequency communication technologies continues to grow, Hoekstra’s inventions will undoubtedly play a pivotal role in shaping the future of this industry.