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Broadband Printed Dipole Antenna With a Step-Shaped Feed Gap for DTV Signal Reception

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, VOL. 55, NO. 11, NOVEMBER 2007 Presenter ： Tai-hung Lin. Outline. Introduction Antenna Design and dimensions

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Broadband Printed Dipole Antenna With a Step-Shaped Feed Gap for DTV Signal Reception

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  1. 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, VOL. 55, NO. 11, NOVEMBER 2007 Presenter：Tai-hung Lin

  2. Outline • Introduction • Antenna Design and dimensions • Experimental Results and Discussion • Conclusion

  3. 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).

  4. Antenna design and dimensions(1) Rectangular shape Size : 20 × 227mm2 . Two asymmetric radiating portions of arm 1 andarm 2.

  5. 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

  6. Experimental Results and Discussion(1) Bandwidth: 340MHz , 53%

  7. Experimental Results and Discussion(2) Bandwidth: 510~680MHz , 28.5%

  8. Experimental Results and Discussion(3)

  9. Experimental Results and Discussion(4)

  10. Radiation patterns (2-D)

  11. Antenna gain and radiation efficiency Antenna gain :1.5 to 2.8 dBi Radiation efficiency : 60%↑

  12. 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.

  13. 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/

  14. Thank for your attention!

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