James A Aurand

Title: Innovations by James A. Aurand

Introduction

James A. Aurand is a notable inventor based in Quincy, IL (US). He has made significant contributions to the field of radio frequency technology, holding 2 patents that showcase his innovative spirit and technical expertise.

Latest Patents

Aurand's latest patents include a "Power Amplifier Tank Circuit" and a "Second Harmonic Suppressor for Power Amplifier Tank Circuit." The Power Amplifier Tank Circuit features an RF tank circuit designed for a transmitter power amplifier stage. It incorporates a half-wave length 'folded' coaxial transmission line as an anode tuning device. This design includes a grounded outer conductor and an ungrounded inner conductor, which operates at a high RF potential. The outer conductor connects electrically to a third conductor that is adjustably extensible into the ungrounded inner conductor, allowing for a folded effect. The third conductor is equipped with a bellows that can be expanded or contracted by external drive means, enabling fine-tuning of the cavity to a selected frequency. Additionally, it allows for coarse adjustment of the bandwidth through variable extension into the inner conductor.

The second patent, the Second Harmonic Suppressor, is designed to suppress the generation of second harmonic frequencies in a power amplifier tank circuit, particularly in radio frequency transmitters. This device connects between the outer conductor, typically at ground potential, and the inner conductor. It utilizes a metal strap, such as a copper strap, connected to the outer conductor's inside surface and a capacitor disk that is movably mounted with respect to the inner conductor. The capacitor disk can be adjusted within the space between the outer and inner conductors, allowing for impedance adjustments. By sliding the rod toward the inner conductor, the loop formed by the copper strap straightens, changing the circuit's inductance. This suppressor is strategically mounted at an RF null point for the fundamental frequency, effectively suppressing the second harmonic.

Career Highlights

James A. Aurand is associated with Broadcast Electronics, Inc., where he applies his expertise in developing innovative solutions for radio frequency technology. His work has significantly impacted the efficiency and performance of power amplifiers in the industry.

Collaborations

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Conclusion

James A. Aurand's contributions to radio frequency technology through his patents demonstrate his innovative approach and technical