Company Filing History:
Years Active: 1998
Title: **Friedrich J. Fisher: Innovator in Antenna Feed Systems**
Introduction
Friedrich J. Fisher, based in Bountiful, Utah, is an accomplished inventor with a unique contribution to the field of antenna technology. With one notable patent to his name, Fisher has made significant strides in enhancing the capabilities of feed systems for antennas.
Latest Patents
Fisher's patent, titled "Plural Band Feed System," introduces a sophisticated feed structure for antennas. This innovative system utilizes a combination of inner and outer coaxial waveguides to handle both higher and lower frequency radiations effectively. The design features a common radiating aperture created by a horn and shroud that envelops the individual feed waveguides. Each feed waveguide carries signals across a bandwidth of an octave, allowing for increased versatility in frequency transmission.
In detail, the outer coaxial feed waveguide receives lower frequency radiation through four waveguides from a specialized launcher, which optimally controls the desired propagation mode. The design is notably enhanced by using a rectangular double-ridged waveguide that transitions to a single inner ridge, eventually culminating in a tapered star-shaped ridge within the outer feed waveguide. Slidable impedance matching rings ensure an accurate standing wave ratio, contributing to a well-defined beam pattern. A dielectric rod at the forward end of the inner feed waveguide assists in shaping the beam of the higher frequency radiation. This invention, therefore, ensures simultaneous radiation across multiple bands while maintaining a common phase center.
Career Highlights
Friedrich J. Fisher is affiliated with L-3 Communications Corporation, where he leverages his expertise in antenna technology. His work there exemplifies a commitment to innovation that pushes the boundaries of existing telecommunications systems.
Collaborations
Fisher collaborates closely with talented professionals such as Bryant Ford Anderson and Joseph Mark Baird. Together, they contribute to advancing research and development in the field, fostering an environment of collaboration that drives innovation forward.
Conclusion
Friedrich J. Fisher's pioneering patent for the plural band feed system represents a remarkable advancement in antenna technology. His contributions not only enhance signal transmission capability but also exemplify the innovative spirit within the telecommunications industry. As he continues to work at L-3 Communications Corporation, Fisher undoubtedly plays an essential role in shaping the future of antenna systems.