1Centre of Research in Microwave Tubes, Dept. of Electronics Engineering, Indian Institute of Technology (Banaras Hindu University), Varanasi
2Department of Science and Technology, TDT Division, New Delhi, India
*Email: swati.mv.ece10@iitbhu.ac.in
**mschauhan.rs.ece@iitbhu.ac.in
Online published on 11 March, 2014.
In the present paper, the design and simulation study of a 35 GHz two cavity gyroklystron amplifier operating in the TE01 mode has been carried out to investigate the multimode beam wave interaction behavior in the RF interaction structure. The PIC simulation is performed using 3D particle in cell code CST particle studio. Using multimode behavior, the effect of presence of nearby modes on the cavity performance is described. The simulation studies produces saturated output peak power 200 kW with efficiency 35% and a saturated gain of 23.4 dB when driven by 70 kV, 8.2 A gyrating electron beam having the velocity pitch factor of 1.43. The theoretical analysis produces an output power ∼211 kW at center frequency of 34.95 GHz with 23.5 dB gain. The results obtained from the present simulation and analysis has been found in match with the reported experimental values [5] within 10%.
Microwave tube, fast-wave device, millimeter wave high power amplifier, PIC simulation
