In this article, a sleeve antenna with a wide impedance bandwidth that consists of a coplanar waveguide line connected to a metallic cylinder is presented. The effect of design parameters on the impedance bandwidth is considered by some simulations. In addition to the wide impedance bandwidth, the omnidirectional pattern, high efficiency, low cost and easy fabrication process, and compact dimensions cause this antenna to be a good choice for some applications at low VHF/UHF frequency bands. Due to the flexible structure of this antenna, it is possible to cover the various frequency bands by changing the parameters of the antenna. In this work a typical model of the proposed antenna for the frequency range of 127 to 586 MHz is fabricated and compared with other previous works. An equivalent circuit model has been proposed to better understand how the antenna works. The proposed antenna has a bandwidth of about 128.7% for a voltage standing wave ratio (VSWR) of less than 3, compact size of 0.274λ × 0.047λ and higher than 90% efficiency.

中文翻译：

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一种新型紧凑型宽带CPW馈电套筒天线

在本文中，介绍了一种具有宽阻抗带宽的套筒天线，该天线由连接到金属圆柱体的共面波导线组成。一些仿真考虑了设计参数对阻抗带宽的影响。除了宽阻抗带宽外，全向模式、高效率、低成本和易于制造的工艺以及紧凑的尺寸使该天线成为低 VHF/UHF 频段的某些应用的理想选择。由于这种天线的柔性结构，可以通过改变天线的参数来覆盖各个频段。在这项工作中，制造了频率范围为 127 至 586 MHz 的建议天线的典型模型，并与其他先前的工作进行了比较。已提出等效电路模型以更好地理解天线的工作原理。所提出的天线具有约 128.7% 的带宽，电压驻波比 (VSWR) 小于 3，紧凑尺寸为 0.274λ× 0.047λ和高于 90% 的效率。