Traveling Wave Tube Amplifiers (TWTAs)

Originally developed to meet the transmission needs of space missions, Stellant’s traveling wave tube amplifier (TWTA) is a small-size, low-mass, high-frequency, high-reliability amplifier with unprecedented output power, bandwidth, and efficiency.

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A traveling wave tube (TWT) or TWT amplifier (TWTA) is a high-power, high-frequency amplifier that is built using traveling wave tubes. A traveling wave tube is a type of vacuum tube used to amplify high-frequency signals. The RF signal is amplified by absorbing power from a beam of electrons as it goes through the tube.

TWTAs usually operate from 300 MHz up to frequencies over 100 GHz (there are cases where these go as high as 650 GHz). They provide power levels from a few watts to megawatts with a gain of 40 to 60 dB.

A typical TWT amplifier consists of a traveling wave tube, an RF input section, a power supply (EPC) and logic interface section, and an RF output section. The TWT is the part that is responsible for the amplification of the signal.