Tuning for very low frequency (VLF) multi-tuning antenna is very difficult in practice. After analyzing the basic method of tuning and calculating the VLF antenna by method of moments (MoM),a new tuning method by the phase of current for VLF multituning antenna is proposed in this paper,it is based on the space vector matched. Through numeric calculation,the current characteristic of the VLF multi-tuning antenna and space matched vector of the electromagnetic wave in tuning process is researched too. The results of the experiments show that this new tuning method is better for VLF multi-tuning antenna than traditional tuning method.
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