一种新型低Q四波段电小天线

IF 3.5 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC
Hanguang Liao;Atif Shamim
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引用次数: 0

摘要

多频段小型(ES)天线是无线传感节点和可穿戴设备的有希望的候选者,这些设备需要多种协议以及紧凑的尺寸。然而,设计用于多波段操作的ES天线具有挑战性。虽然已经探索了各种多波段ES天线设计方法,但没有一种方法能够成功地实现四波段设计的完全ES性能(所有频段ka < 1),因为频带数量的增加通常会导致带宽显着减少甚至消失。本文提出了一种设计四波段全ES天线的新方法。该方法基于分环天线的奇偶模式,并使用射频陷阱加载实现每个模式的双频工作。该天线适用于所有频段。在每个波段,辐射结构几乎使用了全部可用体积,因此在所有四个波段都获得了良好的带宽。制作了该天线,并在为多波段ES天线设计的适当设置中测量了每个频段的性能。测量结果验证了所提出的方法,在四个波段中Q值仅约为Chu极限的3-8倍,这对于ES天线来说是很好的,特别是考虑到所提出的天线是圆柱形而不是球形的。据作者所知,所提出的天线是第一个四波段全ES天线。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A Novel Quad-Band Electrically Small Antenna With Low Q
Multi-band Electrically Small (ES) antennas are promising candidates for wireless sensing nodes and wearable devices, where multiple protocols are required along with a compact size. However, designing ES antennas for multi-band operation is challenging. While various methods for multi-band ES antenna designs have been explored, none have successfully achieved fully ES performance (ka < 1 for all bands) for a quad-band design, as the increasing number of bands often leads to significantly reduced or even vanished bandwidths. Herein, a novel method to design a quad-band fully ES antenna is presented. The proposed method is based on the even and odd modes of a split-ring antenna and uses radio frequency trap loading to achieve dual-band operation for each mode. The proposed antenna is ES for all bands. At each band, the radiating structure uses almost the whole available volume, so a good bandwidth is obtained for all four bands. The proposed antenna is fabricated, and the performance at each band is measured in a proper setup designed for multi-band ES antennas. The measured results validate the proposed method, with Q values only roughly 3–8 times Chu’s limit among four bands, which is considered good for ES antennas, especially given that the proposed antenna is cylindrical rather than spherical. As far as the authors know, the proposed antenna is the first quad-band fully ES antenna.
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来源期刊
CiteScore
6.50
自引率
12.50%
发文量
90
审稿时长
8 weeks
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