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首页> 外文期刊>Wireless personal communications: An Internaional Journal >Main Effects Ensured by Symmetric Circular Slots Etched on the Radiating Patch of a Compact Monopole Antenna on the Impedance Bandwidth and Radiation Patterns
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Main Effects Ensured by Symmetric Circular Slots Etched on the Radiating Patch of a Compact Monopole Antenna on the Impedance Bandwidth and Radiation Patterns

机译：在阻抗带宽和辐射图案上的紧凑型单极天线辐射贴片上蚀刻对称圆形槽确保的主要效果

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摘要

Three compact monopole ultrawideband (UWB) antennas with half-wavelength symmetric circular slots etched on the radiating patch and operating in the UWB spectrum are proposed. Parametric studies followed by experimental results of the return loss coefficient S-11 versus the circular slot length prove dual ensured functions. In fact, a switching from an impedance mismatch to an impedance matching appears when we replace a semicircular etched slot by a small circular slot while maintaining its inner radius constant. Simulated and measured reflection coefficient S-11 of a fabricated prototype with a stack of two small circular slots concord well and prove an impedance bandwidth enhancement that covers 3.9-14 GHz frequencies band (S-11 < -10 dB) compared to the impedance bandwidth 3.55-4.77 and 7.65-11.08 GHz (S-11 < -10 dB) of the baseline antenna without slots. In addition, measured radiation patterns in the H-plane of the monopole with two etched symmetric slots, are stably omnidirectional at 5.8 and 7.5 GHz. It is noted that due to some strong transverse currents around the small circular symmetric embedded slots, the cross-polarization in the same plane and at the same frequencies are not as low as single monopole. We noticed that there appears to be a close correspondence between the minimum of E-Phi and the maximum of E-theta electrical components. That is to say, the signals of the co-polarizations are irrelevant to those of the cross-polarizations. Due to its impedance matching and its stable omnidirectional radiation patterns, reliability and the reduced occupation volume, the proposed printed monopole with two etched small symmetric circular slots is suitable for the emerging applications of the wireless technology.
机译：提出了具有在辐射贴片上蚀刻的半波长对称圆形槽并在UWB频谱中操作的三个紧凑型单极超字母（UWB）天线。参数研究随后是回销系数S-11的实验结果与圆形槽长度证明双重确保功能。实际上，当我们通过小圆形槽取代半圆形蚀刻槽时，出现从阻抗匹配的阻抗错配的切换，同时保持其内半径恒定。模拟和测量的制造原型的反射系数S-11具有两叠两个小圆形槽官方官方展示并证明了与阻抗带宽相比覆盖3.9-14GHz频率带（S-11 <-10 dB）的阻抗带宽增强3.55-4.77和7.65-11.08 GHz（S-11 <-10 dB）的基线天线没有插槽。另外，具有两个蚀刻对称槽的单极的H平面中测量的辐射图案，在5.8和7.5GHz处是稳定的全向的。应注意，由于小圆形对称嵌入槽周围的一些强的横向电流，同一平面和相同频率的交叉极化不像单个单极一样低。我们注意到，在E-PHI的最小值和最大电子元件的最大值之间看起来似乎是密切的对应关系。也就是说，共偏振的信号与交叉偏振的信号无关。由于其阻抗匹配和其稳定的全向辐射图案，可靠性和占用体积减少，所提出的印刷单极具有两个蚀刻的小对称圆形槽是适用于无线技术的新兴应用。

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