Research Article
Analysis of the Electrical Performance of Multituned VLF Thirteen-Tower Umbrella Antennas
Table 3
Simulation results of the radiation efficiency.
| Model | Parameters | Single-tuned antenna (n = 1) | “One main and one deputy” multituned antenna (n = 2) | “One main and two deputy” multituned antenna (n = 3) | “One main and five deputy” multituned antenna (n = 6) |
| Model I | Radiation resistance (Ω) | 0.2064 | 0.8240 | 1.8453 | 7.2417 | Conductor loss resistance (Ω) | 0.0096 | 0.0337 | 0.0772 | 0.2667 | Ground loss resistance (Ω) | 0.6258 | 2.5034 | 5.6289 | 21.9755 | Radiation efficiency | 24.5% | 24.5% | 24.4% | 24.6% | Model II | Radiation resistance (Ω) | 0.2064 | 0.8240 | 1.8453 | 7.2417 | Conductor loss resistance (Ω) | 0.0096 | 0.0337 | 0.0772 | 0.2667 | Ground loss resistance (Ω) | 0.0707 | 0.2813 | 0.6325 | 2.4200 | Radiation efficiency | 72.0% | 72.3% | 72.2% | 72.9% |
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Detailed simulation results of antenna model I and model II with single tuning and multituning at 24 kHz, and n is the number of the antenna units.
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