Abstract
In order to apply the traveling wave tubes (TWTs) in the active phased array radar system, new mini-TWT, i.e., multiple electron beam helix TWT (MBTWT) is studied. It is made by putting 3 helixes and electron beams into one metal tube and one PPM focus system. They have common electron gun and collector. The electron gun has a common heater and 3 emitting cathode heads which produce 3 electron beams. The collector has 3 electron beam collecting channels. This structure will form 3 TWT amplifiers and loosen the size requirement to TWT for its application in the active phased array radar system.
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