QEI is the leader in innovation and design for Radio Frequency Products.

Founded in 1971, QEI Corporation innovates, designs, and manufactures radio frequency (RF) industrial power systems used in the Semiconductor, Scientific, Industrial, Laser and Broadcast industries. With QEI’s combined technology offering of hybrid based and solid-state systems, QEI has the widest product offering in the RF amplifier industry. QEI, in many cases, offers the only solution to the technological challenges faced by its customers.