DGS-Loaded Magnetic Material for Radiation Characteristic Improvement of Microstrip Antenna

Rheyuniarto Sahlendar Asthan, A. Munir
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引用次数: 5

Abstract

The radiation characteristics improvement of mi-crostrip antenna affected by a defected ground structure (DGS) loaded magnetic material is presented. The antenna which is designed by microstrip technology aims to work at the center frequency of 4 GHz, whereas the magnetic material loaded into the DGS is polycrystalline Yttrium Iron Garnet (YIG). The radiation characteristics of the antenna are investigated under the incorporation of DGS-loaded magnetic material without an external magnetic bias. The investigation results are then compared with radiation characteristics of the conventional microstrip antenna. It was found that the inclusion of magnetic material could widen the axial ratio bandwidth around the center frequency up to 90% improving the circular polarization characteristic, while it maintains the working frequency and the radiation pattern.
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改善微带天线辐射特性的dgs负载磁性材料
研究了缺陷接地结构(DGS)加载磁性材料对微带天线辐射特性的影响。采用微带技术设计的天线目标工作在4 GHz的中心频率,而加载到DGS中的磁性材料是多晶钇铁石榴石(YIG)。研究了无外偏磁的dgs负载磁性材料对天线辐射特性的影响。将研究结果与传统微带天线的辐射特性进行了比较。结果表明,磁性材料的加入可在保持工作频率和辐射方向图不变的情况下,将中心频率附近的轴比带宽提高90%,改善了圆极化特性。
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