Theoretical Design of a Dual-Band TE01/TE02 Mode Gyrotron Traveling Wave Tube
Abstract
:1. Introduction
2. Basic Theoretical Analysis of the Dual-Band Gyro-TWT
3. The Key Component Design of the Dual-Band Gyro-TWT
3.1. Beam–Wave Interaction Circuit and PIC Simulation
3.2. Scheme of the Dual-State Triode MIG
3.3. Dual-Mode Input Coupler with Coaxial Cavity
3.4. Output System
3.5. Discussion
4. Conclusions
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
References
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ID | Type of Gyro-TWT | Frequency (GHz) | Power (kW) | Efficiency (%) | Gain (dB) | Bandwidth (GHz) |
---|---|---|---|---|---|---|
Ref. [5] | helically corrugated circuit | 96 | 3 kW (CW) | 15 | 54 | 2.5 |
Ref. [6] | periodic-dielectric-loaded circuit | 93 | >60 | >10.06 | 32 | 8 |
Ref. [7] | confocal waveguide circuit | 140 | 0.82 | 0.8 | 34 | 0.8 |
Ref. [8] | photonic-band-gap circuit | 250 | 0.045 | 0.43 | 38 | 8 |
Ref. [9] | lossy circuit | 220 | >10 (simulation) | >5.7 | >60 | 18 |
Ref. [10] | helically corrugated circuit (frequency doubler) | 263 | 0.25 (simulation) | 2.5 | >40 | 17.5 |
Ref. [11] | lossy circuit | Ka/V band | 375/150 (simulation) | 26.7/10.7 | 71/35 | 3.8/1.7 |
Ref. [12] | lossy circuit | Ku/Ka band | 238/158 (simulation) | 30.9/25.1 | 45.5/50.4 | 1.5/2.5 |
Quantity | K-Band | Ka-Band |
---|---|---|
Operating mode | TE01 | TE02 |
Beam voltage () | 60 kV | |
Beam current () | 4.5 A | 4 A |
Velocity ratio () | 1.2 | 1 |
Operating magnetic field () | 0.68 Tesla | 1.25 Tesla |
Waveguide radius () | 10.1 mm | |
Dielectric thickness | 1.5 mm | |
Guiding center radius () | 0.48 | 0.2625 |
Unloaded section length | 48 mm | |
Total circuit length | 425 mm |
Quantity | K-Band | Ka-Band |
---|---|---|
Cathode emitter radius () | 12.21 mm | 6.6 mm |
Cathode magnetic field () | 0.103 Tesla | 0.197 Tesla |
Magnetic compression ratio () | 6.6 | 6.35 |
Cathode voltage () | −60 kV | |
Modulating anode voltage () | −28 kV | −17 kV |
Length of emitting surface () | 1.15 mm | 1.04 mm |
Velocity ratio () | 1.2 | 1 |
Beam current () | 4.5 A | 4 A |
Axial velocity spread () | <5% |
Key Component | Operating Frequency Range | Transmission Coefficient | Reflection Coefficient | |
---|---|---|---|---|
K-Band (TE01) | Ka-Band (TE02) | |||
Beam–wave interaction circuit (Figure 7) | 18.5–19.5 GHz | 33.6–35.6 GHz | - | - |
Dual-mode input coupler (Figure 10) | 18.5–20.5 GHz | 33.6–35.5 GHz | >−3 dB | <−10dB/<−15 dB |
Dolph–Chebychev gradual waveguide (Figure 11) | >18.3 GHz | >33.3 GHz | >−0.5 dB | <−20 dB/<−30 dB |
Three-disk output window (Figure 13) | 17–20.2 GHz | 33.5–36 GHz | >−2.5 dB | <−10 dB/<−15 dB |
ID | Frequency (GHz) | Power (kW) | Efficiency (%) | Gain (dB) | −3 dB Bandwidth (GHz) |
---|---|---|---|---|---|
Ref. [11] | Ka/V band | 375/150 | 26.7/10.7 | 71/35 | 3.8/1.7 |
Ref. [12] | Ku/Ka band | 238/158 | 30.9/25.1 | 45.5/50.4 | 1.5/2.5 |
Designed dual-band gyro-TWT | K/Ka band | 87.1/62 | 32.3/25.8 | 42.74/60.76 | 0.7/2 |
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Chen, R.; Zhang, T.; Zhao, Q.; Yu, S. Theoretical Design of a Dual-Band TE01/TE02 Mode Gyrotron Traveling Wave Tube. Electronics 2023, 12, 3282. https://doi.org/10.3390/electronics12153282
Chen R, Zhang T, Zhao Q, Yu S. Theoretical Design of a Dual-Band TE01/TE02 Mode Gyrotron Traveling Wave Tube. Electronics. 2023; 12(15):3282. https://doi.org/10.3390/electronics12153282
Chicago/Turabian StyleChen, Rutai, Tianzhong Zhang, Qixiang Zhao, and Sheng Yu. 2023. "Theoretical Design of a Dual-Band TE01/TE02 Mode Gyrotron Traveling Wave Tube" Electronics 12, no. 15: 3282. https://doi.org/10.3390/electronics12153282