博碩士論文 102521103 詳細資訊




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姓名 劉得維(Te-wei Liu)  查詢紙本館藏   畢業系所 電機工程學系
論文名稱 共平面波導饋入槽孔偶極天線之寬頻與多頻應用
(CPW-fed slot dipole antennas for broadband and multiband applications)
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摘要(中) 本篇論文介紹兩支共平面波導饋入槽孔偶極天線分別對於寬頻與多頻的應用。首先第一支天線為共平面波導饋入之電感式耦合的槽孔偶極天線,在論文中有對於寬頻天線一連串的設計步驟作說明,天線結構是在矩形槽孔末端分別連接上五對細長形的槽孔,每一個共振頻率分別由各別的共振路徑所控制。天線產生的五個模態分別涵蓋DCS (1.71 GHz to 1.88 GHz),PCS (1.85 GHz to 1.99 GHz),WCDMA (1.92 GHz to 2.17 GHz),WLAN (2.4 GHz to 2.5 GHz) 和LTE2500 (2.5 GHz to 2.69 GHz)。實作出來的天線10-dB 比例頻寬達到80%。這支天線的輻射場型在x-z平面和y-z平面的水平(ϕ)極化趨向於全向性,而在垂直(θ)極化則是呈現一個8字形。
第二支天線為共平面波導饋入之電容式耦合的多頻槽孔偶極天線,天線中心頻率分別設計在2.49 GHz,3.57 GHz和5.25 GHz其中10-dB 比例頻寬分別為12.9%,2.52% 和5.33%。在電路中央的矩形槽孔末端分別連接多對細長形槽孔實現多頻響應,此類設計有很高的設計自由度。三個頻帶分別可應用於WLAN2400 (2.4 GHz to 2.5 GHz),WiMAX (3.4 GHz to 3.69 GHz)和WLAN5200 (5.15 GHz to 5.35 GHz)。天線的場型在H-plane接近一個全向性的形狀。
摘要(英) This thesis introduces CPW-fed slot dipole antennas for broadband and multiband applications. In the second section, we introduce an inductively-coupled CPW-fed slot dipole antenna. This thesis presents a series of broadband uniplanar antenna design. The design shows five pairs of protruded slot line in conjunction with the ends of rectangular aperture pairs. Each operation band is controlled by a respective resonating path resulting in a high design freedom. The antenna produces five modes to cover DCS (1.71 GHz to 1.88 GHz), PCS (1.85 GHz to 1.99 GHz), WCDMA (1.92 GHz to 2.17 GHz), WLAN (2.4 GHz to 2.5 GHz) and LTE2500 (2.5 GHz to 2.69 GHz). The fabricated antenna with 10-dB fractional bandwidth is up to 80%. The proposed antenna achieves a near omnidirectional radiation while horizontal (ϕ) polarization and bidirectional radiation while vertical (θ) polarization in the x-z plane and the y-z plane.
In the third section, we introduce a capacitively-coupled CPW-fed slot dipole antenna. The proposed antenna presents 12.9%, 2.52% and 5.33% of greater than 10-dB return loss (RL) at center frequency of 2.49 GHz, 3.57 GHz and 5.25 GHz, respectively. By adding the multiple protruded slots, one can achieve multiband resulting in a high design freedom. The three operation frequencies applied in WLAN2400 (2.4 GHz to 2.5 GHz), WiMAX (3.4 GHz to 3.69 GHz) and WLAN5200 (5.15 GHz to 5.35 GHz). The proposed antenna achieves a near omnidirectional radiation H-plane patterns.
關鍵字(中) ★ 槽孔偶極天線
★ 多頻帶天線
★ 寬頻天線
★ 共平面波導
關鍵字(英) ★ slot dipole antenna
★ multiband antenna
★ broadband antenna
★ coplanar waveguide
論文目次 目錄
摘要 I
Abstract II
目錄 III
圖目錄 IV
表目錄 VII
第一章 緒論 1
1.1 研究動機 1
1.2 文獻參考 2
1.3 論文架構 11
第二章 電感式耦合共平面波導饋入之寬頻槽孔偶極天線 12
2.1 簡介 12
2.2 磁流分析 19
2.3 寬頻槽孔偶極天線參數分析 24
2.4 電路實作及量測結果 30
第三章 電容式耦合共平面波導饋入之多頻槽孔偶極天線 37
3.1 簡介 37
3.2 磁流分析 39
3.3 多頻槽孔偶極天線參數分析 41
3.4 多頻槽孔偶極天線匹配分析 44
3.5 電路實作及量測結果 51
第四章 結論 56
參考文獻 57
參考文獻 [1] H.-D. Chen, “Broadband CPW-fed square slot antenna with a widened tuning stub,” IEEE Trans. Antennas Propag., vol. 51, no. 8, pp. 1982–1986, Aug. 2003.
[2] X.-C. Lin and L.-T Wang, “A broadband CPW-fed loop slot antenna with harmonic control,” IEEE Antennas Wireless. Propag. Lett., vol. 2, pp. 323–325, 2003.
[3] Y.-C. Lin and K.-J. Hung. “Compact ultrawideband rectangular aperture antenna and band-notched designs,” IEEE Trans. Antennas Propag., vol. 54, no. 54, pp. 3075–3081, Nov. 2006.
[4] R. G. Pierce, A. J. Blanchard and R. M. Henderson. “Broadband planar modified aperture bowtie antenna,” IEEE Antennas Wireless. Propag. Lett., vol. 12, pp. 1432–1435, 2013.
[5] A. U. Bhobe, C. L. Holloway, M. Piket-May, and R. Hall. “Wide-band slot antennas with CPW feed Lines: Hybrid and log-periodic designs,” IEEE Trans. Antennas Propag., vol. 52, no. 10, pp. 2545–2554, Oct. 2004
[6] D. D. Krishna, M. Gopikrishna, C. K. Anandan, P. Mohanan and K. Vasudevan, “CPW-fed Koch fractal slot antenna for WLAN/WiMAX application,” IEEE Antennas Wirel. Propag. Lett., vol. 7, pp. 389–392, 2008.
[7] M.-J. Chiang, T.-F. Hung, J.-Y. Sze and S.-S. Bor. “Miniaturized dual-band CPW-fed annular slot antenna design with arc-sharped tuning stub, ” IEEE Trans. Antennas Propag., vol. 58, no. 11, pp. 3710–3715, Nov. 2010.
[8] S.-W. Chen, D.-Y. Wang, and W.-H. Tu. “Dual-band/tri-band/broadband CPW-fed stepped-impedance slot dipole antennas,” IEEE Trans. Antennas and Propag., vol. 62, no. 1, pp. 485–490, Jan. 2014.
[9] S.-Y. Chen, Y.-C. Chen and P. Hsu. “CPW-fed aperture-coupled slot dipole antenna for tri-band operation,” IEEE Antennas Wirel. Propag. Lett., vol. 7, pp. 535–537, 2008.
[10] W.-H. Tu. “Compact harmonic-suppressed coplanar waveguide-fed in-ductively coupled slot antenna,” IEEE Antennas Wirel. Propag. Lett., vol. 7, pp. 543–545, 2008.
[11] W.-H. Tu and K. Chang. “Miniaturized CPW-fed slot antenna using stepped impedance resonator,” in Proc. IEEE Int. AP-S Symp., Washington, DC, Jul. 2005, vol. 4A, pp. 351–354.
指導教授 凃文化(Wen-hua Tu) 審核日期 2016-1-25
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