Crystek Microwave has launched the Crystek Pocket Passive Doubler series frequency multipliers. They are designed in a rugged SMA housing for easy in-line assembly and operation in test equipment and general laboratory use. The CPPD-0.85-2 accepts input frequencies from 0.85 to 2.0 GHz and multiplies by a factor of two to achieve output frequencies from 1.7 to 4.0 GHz. Input for the CPPD-2-4 is from 2 to 4 GHz, with output from 4 to 8 GHz. Input drive level for both is from 10 to 20 dBm.