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首页> 外文期刊>IEEE Transactions on Antennas and Propagation >Small Low-Profile Loop Wideband Antennas With Unidirectional Radiation Characteristics
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Small Low-Profile Loop Wideband Antennas With Unidirectional Radiation Characteristics

机译：具有单向辐射特性的小型薄型环形宽带天线

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摘要

Small low-profile wideband loop antennas featuring unidirectional radiation characteristics are presented. Directive radiation characteristic is achieved by proper combination of fields radiated by symmetric and anti-symmetric current components supported by any loop antenna. Relative strengths of the symmetric and the anti-symmetric radiations change according to shape of the loop. Prototype loop antennas are fabricated and their impedance and radiation gain patterns are measured. The gain patterns show directive characteristics in both major planes. It is shown that the gain measured in the desired direction of maximum radiation exceeds the maximum achievable practical gain for omnidirectional antennas of the same dimensions over wide frequency band
机译：提出了具有单向辐射特性的小型薄型宽带环形天线。通过适当组合任意环形天线支持的对称和反对称电流分量辐射的场，可以实现定向辐射特性。对称辐射和反对称辐射的相对强度会根据环路的形状而变化。制造原型环形天线，并测量其阻抗和辐射增益方向图。增益模式在两个主要平面上均显示出指令特性。结果表明，在期望的最大辐射方向上测得的增益超过了在宽频带上相同尺寸的全向天线所能达到的最大实际增益。

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