Seth Nash

Title: Seth Nash and the Ring Hybrid Mixer

Introduction

Seth Nash is an inventor associated with Boston, Massachusetts, and Alpha Industries. His work includes a patent for a ring hybrid mixer, a microwave circuit designed to combine and route signals through a compact structure. Nash is credited with 1 patent in the information provided.

Latest Patents

Nash’s listed patent, “Ring hybrid mixing,” describes a hybrid ring mixer built on a gallium arsenide substrate. An annular conducting ring forms part of a strip transmission line, while three outward-facing conductors provide ports for the local oscillator, signal input, and intermediate-frequency output. Two inward-facing conductors connect to diode ports.

The design places a grounded conducting surface inside the ring, with circular sectors of different radii. Mesa diodes connect the diode ports to the smaller-radius sector, and a plated via provides an electrical connection between the grounded surface and the conducting layer on the substrate’s underside. The patent also describes fabrication steps involving epitaxial layers, diode contacts, circuit metallization, and formation of the via.

Career Highlights

The available information associates Nash with Alpha Industries and identifies the ring hybrid mixer as his patented invention. The design combines a specific port arrangement, diode connections, and a grounded internal surface to implement the mixer circuit.

Collaborations

Daniel Donoghue and Steven Mittleman are identified as Nash’s coworkers. The information provided does not specify their roles in developing or patenting the ring hybrid mixer.

Conclusion

Seth Nash’s listed patent documents a gallium arsenide ring hybrid mixer design, reflecting his contribution to microwave circuit technology during his association with Alpha Industries.