Effective Q factor for spherical surface antennas
Effective Q factor for spherical surface antennas
复制标题
球面天线的有效 Q 因子
DOI：
10.1109/iwat.2018.8379124
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
Keisuke Fujita
中科院分区：
文献类型：
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作者：
Keisuke Fujita
本文计算了自谐振球面天线的有效Q因子。假设在球面上存在一个电流片，并根据球面波扩展的最低TE和TM模式描述其辐射场。利用球面模态的储能公式，得到损耗较小的Q因子。有效Q因子由减损Q因子与辐射效率相乘计算。结果与非谐振单模情况和Chu极限进行了比较。
The effective Q factor for self-resonant spherical surface antennas has been calculated in this study. A current sheet is assumed on the spherical surface and its radiated field is described in terms of the lowest TE and TM modes of the spherical wave expansion. Using the formula for stored energy of spherical mode, loss less Q factor is obtained. The effective Q factor is computed by multiplying the loss less Q factor and the radiation efficiency. The result is compared with non-resonant single mode case and with Chu limit.