一种适用于WLAN的小型化双频天线设计
A Novel Compact Dual-Band Antenna Design for WLAN Applications
摘要：
本文提出并研究了一种适用于2.4/5.2/5.8 GHz无线局域网（WLAN）的新型紧凑型双频平面天线。天线包括T形和F形元件，以产生用于双频带操作的两个谐振模式。这两个元件可以独立地控制两个激发的谐振模式的工作频率。由50 $Ω$微带线直接馈电的T元件产生大约5.2 GHz的频带，并且天线参数也可以被调整以产生5.8 GHz的频带，从而单独地覆盖WLAN系统的两个较高频带。通过T元件耦合馈送F元件，可以在2.4GHz处产生频带以覆盖WLAN系统的较低频带。因此，两个元件一起非常紧凑，总面积仅为11 $\times$ 6.5 mm $^{2}$。在设计中的关键尺寸的一个彻底的参数研究已被执行，所获得的结果已被用来提出一个通用的设计方法。图的回波损耗和辐射方向图已给出和详细讨论，表明该设计是一个非常有前途的候选WLAN应用。
英文摘要：
A novel and compact dual band planar antenna for 2.4/5.2/5.8-GHz wireless local area network(WLAN) applications is proposed and studied in this paper. The antenna comprises of a T-shaped and a F-shaped element to generate two resonant modes for dual band operation. The two elements can independently control the operating frequencies of the two excited resonant modes. The T-element which is fed directly by a 50 $Ω$ microstrip line generates a frequency band at around 5.2 GHz and the antenna parameters can be adjusted to generate a frequency band at 5.8 GHz as well, thus covering the two higher bands of WLAN systems individually. By couple-feeding the F-element through the T-element, a frequency band can be generated at 2.4 GHz to cover the lower band of WLAN system. Hence, the two elements together are very compact with a total area of only 11$\times$6.5 mm$^{2}$. A thorough parametric study of key dimensions in the design has been performed and the results obtained have been used to present a generalized design approach. Plots of the return loss and radiation pattern have been given and discussed in detail to show that the design is a very promising candidate for WLAN applications.
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