Abstract
An additional disk was introduced in the unit cell of a periodic disk-loaded interaction structure for a gyro-traveling-wave tube, and the small-signal gain-frequency response of the device was studied. The dispersion data of interwoven-disk-loaded structure were fed into the small-signal gain equation for the calculation of the small-signal device gain. The effects of the gyrating electron beam, magnetic field, and dimensional parameters were discussed in order to achieve a wideband device performance. The gain-frequency response of an interwoven-disk-loaded device was compared with that of a conventional disk-loaded device to show the widening of the device bandwidth. For typically chosen structure parameters, the 3-dB device bandwidth was found to be improved from 4.7 to 6.4 GHz ( ~ 36%) in a Ka-band device.
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