American Microwave Corp. announces its latest product development. AMC Model Number APD3-0080G-0180G-111A is an 8 to 18 GHz phase invariant digital programmable attenuator. A double balanced arrangement of quadrature couplers and pin diodes gives phase invariant attenuation. It has an attenuation range of 32 dB, insertion loss of <5.5 dB, VSWR of 2.0:1.