Product Overview Mini-Circuits D18PA+ is a MMIC directional coupler designed for applications from 1700 to 2000 MHz. This model provides excellent power handling up to 4W in a tiny device package (3.1 x 3.0 x 1.6 mm). A built-in 50 termination on the isolated port simplifies circuit design and reduces component count. Manufactured using Silicon IPD technology, this model provides a high level of ESD protection and excel- lent reliability.