Open Access
Table 1
Comparison of parameters of the metamaterial-inspired klystrons and conventional klystrons.
| Types | Voltage (kV) |
Current (A) |
Output power (MW) |
Efficiency | Gain (dB) |
Diameter (mm) |
Length (mm) |
Number of cavities |
|---|---|---|---|---|---|---|---|---|
| S-band metamaterial-inspired klystron [34] | 120 | 80 | 5.51 | 57.4% | 55.6 | 36 | 327.1 | 5 |
| S-band conventional klystron [36] |
127 | 92 | 5.5 | 47.1% | 44.4 | \ | \ | \ |
| 714 MHz metamaterial-inspired klystron [37] | 100 | 40 | 2.28 | 57% | 46.6 | 129.4 | 1236 | 4 |
| 700 MHz conventional klystron [38] | 95 | 16.6 | 1.1 (CW) | 69.8% | 45.6 | ∼270 | ∼1800 | 6 |
| 324 MHz metamaterial-inspired klystron [40] | 110 | 47.23 | 2.97 | 57.2% | 50.6 | 280 | 1890 | 5 |
| 324 MHz conventional klystron [41] | 110 | 50 | 3 | 55% | 50 | 350 | 3600 | 5 |
| X-band metamaterial-inspired klystron [43] | 45 | 8 | 0.187 | 52% | 49.7 | 12.76 | 94.7 | 4 |
| X-band conventional klystron [43] |
45 | 8.5 | 0.1 | 28% | 53 | ∼16 | ∼120 | \ |
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