SKYA21037 0.7GHz to 3.8GHz DPDT Switch Skyworks Solutions, Inc. SKYA21037 0.7GHz to 3.8GHz DPDT Switch provides high-linearity performance, low insertion loss, and high isolation. The AEC-Q100 grade 2 qualified SKYA21037 Switch is controlled by one voltage input (CTRL1). Depending on the logic voltage level applied to this pin, the PORT1 and PORT2 pins connect to one of the two other RF port pins (PORT3 or PORT4) through a low insertion loss path. This connection thrives while maintaining a high isolation path to the alternate port. No external DC blocking capacitors are required on the RF path as long as no DC voltage is applied externally.