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!