Dielectric Laboratories is a global supplier of microwave and millimeter wave components for optical and wireless communications, military, medical, semiconductor, aerospace, and transportation markets. DLI is the world’s largest supplier of high Q single-layer capacitors, a global leader in high Q multi-layer capacitors, and offers the world’s more comprehensive line of broadband blocks. Our high performance line of cavity resonators, custom filters, equalizers, and heat sinks is based on decades of design and ceramics processing know-how.

The company was founded in 1974 in Fairfield, New Jersey as a manufacturer of high Q, temperature compensating multi-layer capacitors. We quickly realized that carefully crafted single-layer capacitors were superior to multi-layer devices for many higher frequency applications and this was the beginning of the DiCap® product line. It also spawned the basic philosophy that drives DLI today - deliver innovative products that enhance customers' products. In 1977, the company moved to the current site. Dover Corporation purchased the company in 1985 and, today, DLI is an operating company within the Dover Electronics subsidiary.