XOR Antenna Systems, LLC

Multi-Band Dipole and Yagi HF Antennas

About XOR Antennas

Last updated: 11 February 2026

Founder

The Company’s founder [Bill Davis] is an Electrical Engineer, who retired after 30 years with Motorola. While at Motorola, Bill was a Senior Member of the Technical Staff, Associate Member of the Science Advisory Board, and a Dan Noble Fellow.

Bill published many papers in IEEE Journals and IEEE Conferences, including an IEEE Best Paper Award. Bill currently holds 54 U.S. patents.

After retirement, Bill has been utilizing his engineering experience and expertise, to give back to a “Hobby”  that, as a young “Ham” radio operator, started his interest that resulted in a career.

                      Genesis

XOR Antenna Systems LLC was founded in the State of Arizona, based on an objective to provide reliable, power efficient and cost-effective multiband amateur radio HF antennas, without the use of moving elements,  resonant traps,  open sleeves, or excess elements. A Switch-Mode Technology was developed that switches multiple linear dipole antenna element segments, to generate multiple half-wavelengths    for    multiband      dipole

antenna  with a single feed point.  As a result, a ham radio multi-band rotatable dipole antennas and multi-band Yagi antennas (ham radio HF beam antennas) have been subsequently developed for the amateur radio community.