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Broadband Printed Dipole Antenna With a Step-
Shaped Feed Gap for DTV Signal Reception
Yun-Wen Chi, Kin-Lu Wong, and Saou-Wen Su
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, V
OL. 55, NO. 11, NOVEMBER 2007
Presenter : Tai-hung Lin
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Outline
Introduction
Antenna Design and dimensions
Experimental Results and Discussion
Conclusion
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Introduction
Promising planar antenna types Planar inverted-F antennas(0.25λ , PIFAs). Patch antenna. Printed monopoles / dipoles antenna. Chip antenna( plastic , foam , ceramic bases) Slot antenna (0.5λ). Loop antenna (1λ).
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Antenna design and dimensions(1)
Rectangular shape Siz
e : 20 × 227 mm2 .
Two asymmetric radiating portions of arm 1 and arm 2 .
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Antenna design and dimensions(2) DTV (Digital television) bandwidth 470 ~ 806MHz.
Printed dipoles antenna ( 約 0.5λ).
WLAN 波長 ( 空氣 )
天線長度為 267mm (L+2W) /λo= 0.418λ
mmMHzf
CO 3.638
470
103 8
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Experimental Results and Discussion(1)
Bandwidth: 340MHz ,
53%
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Experimental Results and Discussion(2)
Bandwidth: 510~680MHz , 28.5%
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Experimental Results and Discussion(3)
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Experimental Results and Discussion(4)
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Radiation patterns (2-D)
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Antenna gain and radiation efficiency
Antenna gain :1.5 to 2.8 dBi
Radiation efficiency : 60%↑
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Conclusion A broadband printed dipole antenna with a step-shaped
feed gap for DTV signal reception in the 470–806 MHz band has been proposed.
The obtained impedance bandwidth (2.5:1 VSWR) reaches 340 MHz (470–810 MHz) or about 53% centered at 640 MHz.
The wide operating band, stable radiation characteristics (60%↑) have also been obtained.
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作者 : 郗韻文 (Yun-Wen Chi)
手機天線設計競賽 - 2006 、 2008- 冠軍 2007- 佳作
http://www.mobilehero.com/
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Thank for your attention!