Profile: Quarterwave Corp. manufactures traveling wave tube amplifiers. Commercial off the shelf (COTS) line of traveling wave tube (TWT) amplifiers range in power from 5 Watts CW to 50 kW pulsed. These TWT amplifiers cover the frequency range from 1 GHz to 96 GHz, dependent upon the availability of a TWT. The CW amplifiers are typically in octave bandwidths. Pulsed amplifiers cover multi-octave and narrow band frequency ranges. TWTA are used as transmitters in sophisticated synthetic aperture radars (SAR), airborne weather research, under the NASA TRMM program, and in many of the nation's radar cross section (RCS) low observable test measurements programs. Other applications include threat platform simulators, wireless communications, satellite uplinks, and a growing number of EMI/RFI test facilities.