In this paper,a HF broadband antenna that use wire sector-conical structure is designed. The Feko software is used to compute the VSWR and power gain of the antenna with different frequencies.A miniaturized antenna that uses from 2MHz to 30MHz is designed.The span of antenna is reduced from 76m to 53m.The VSWR is within 2.5:1 of HF band,the maximal direction gain is greater than 5dB.
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