Uniplanar Printed Coupled-Fed PIFA With a Band-Notching Slit for WLAN/WiMAX Operation in the Laptop Computer
Uniplanar Printed Coupled-Fed PIFA With a Band-Notching Slit for WLAN/WiMAX Operation in the Laptop Computer
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DOI：
10.1109/tap.2009.2015843
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发表时间：
2009-04
影响因子：
5.7
通讯作者：
Cheng-Tse Lee;Kin‐Lu Wong
中科院分区：
文献类型：
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作者：
Cheng-Tse Lee;Kin‐Lu Wong
提出了一种适用于2.4/5.2/5.8 GHz WLAN和2.5/3.5/5.5 GHz WiMAX工作的小尺寸单平面印刷天线。天线是耦合馈电PIFA，当安装在膝上型计算机中的显示面板的顶部边缘时，仅显示9 mm的高度和13 mm的宽度。通过使用耦合馈电，并在PIFA的辐射臂中进一步嵌入带陷波狭缝，实现了多频带工作。利用耦合馈电，PIFA可以产生约2.5和5.5 GHz的两个宽工作频带。通过进一步嵌入长度约为约4GHz的四分之一波长的狭缝，获得了约4GHz的带陷波特性，这导致了约3.5GHz的附加谐振，并且对期望的2.5和5.5GHz频带显示出非常小的影响。这种行为导致成功地激发用于3.5GHz WiMAX操作的附加谐振模式。因此，在不增加天线尺寸的情况下，所提出的PIFA实现了用于覆盖WLAN/WiMAX系统的所有期望工作频带的三个宽工作频带。详细的设计考虑，并讨论了制造的原型的结果。
A small-size uniplanar printed antenna suitable for 2.4/5.2/5.8 GHz WLAN and 2.5/3.5/5.5 GHz WiMAX operations is presented. The antenna is a coupled-fed PIFA and shows a height of 9 mm and a width of 13 mm only, when mounted at the top edge of the display panel in the laptop computer. The multiband operation is achieved by using the coupling feed and further embedding a band-notching slit in the radiating arm of the PIFA. With the coupling feed, two wide operating bands can be generated at about 2.5 and 5.5 GHz for the PIFA. By further embedding the slit of length about a quarter-wavelength at about 4 GHz, a band-notching characteristic at about 4 GHz is obtained, which leads to an additional resonance at about 3.5 GHz and shows very small effects on the desired 2.5 and 5.5 GHz bands. This behavior results in successful excitation of an additional resonant mode for 3.5 GHz WiMAX operation. Hence, with no increase in the antenna size, three wide operating bands for covering all the desired operating bands of WLAN/WiMAX systems are achieved for the proposed PIFA. Details of the design considerations are presented, and results of the fabricated prototype are discussed.