Design of novel planar shorting structure broadband monopole antenna
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摘要: 提出了一种改进后的新型平面短路结构宽带振子天线.与普通振子天线相比,该天线的平面短路结构更利于与载体表面共形.通过对天线主要结构参数分析优化,这种新型天线,凭借着其独特的外形结构和阻抗加载技术,相比于同类天线不但实现了天线尺寸的小型化,而且有更好的带宽和辐射特性.软件仿真表明,该天线在超短波甚高频(VHF,Very High Frequency)工作频段(30~88MHz)内满足电压驻波比小于3,垂直极化,水平全向辐射,辐射强度在工作频段优于-10dB,辐射增益平坦度在2dB以内.计算结果与实测结果吻合良好,该天线在超短波通信系统中有较好的应用前景.Abstract: An improved novel planar shorting structure broadband monopole antenna was presented. In the light of planar structure easily conformal to substrate, the special shape structure and the technique of load-adding, this kind of antenna realizes the miniaturization and has a better bandwidth and radiation compared with the conventional monopole antenna. The theoretical parameters analysis of the main structure and simulation results with high frequency structure simulator(HFSS) show that the antenna satisfies the conditions of voltage standing wave ratio(VSWR) less than 3, vertical polarization, horizontal omni-directional radiation, radiation gain no less than -10dB and radiation smoothness below 2dB, on the work frequency band ranged from 30~88MHz. The antenna has a wide application in vere high freqwency(VHF)communication system. The calculational results derived agree well with the experimental results.
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Key words:
- conformations /
- loading /
- polarization
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