臺灣博碩士論文加值系統

本論文提出半波長槽孔陣列天線與四分之一波長槽孔陣列天線之寬頻設計。其中，槽孔天線單元均以微帶線偏移饋入，以獲得較大的阻抗頻寬，進而提升所組成陣列天線之頻寬。吾人設計之半波長槽孔陣列天線，在其寬頻阻抗頻寬內均能維持穩定的天線增益與輻射場形。此外，藉由截去接地面以形成準開路，可大幅縮小槽孔天線單元及其所組成陣列之面積，而其頻寬也可再提升。吾人設計之四分之一波長槽孔陣列天線，有大於半波長槽孔陣列天線之阻抗頻寬，且在頻帶內仍有不錯且穩定的增益與場形。為使槽孔陣列天線得以單向輻射，吾人使用一金屬平面做為反射板，以消除背向輻射、提升天線增益。上述槽孔陣列天線及其設計細節均於本論文中深入討論，並以模擬與量測結果相互印證。

The broadband designs of half-wavelength slot array and quarter-wavelength slot array are proposed in this thesis. The slot elements are offset-fed by microstrip line to obtain the wider impedance bandwidth. Furthermore, the impedance bandwidth of the array antennas which composed of the slot elements can be wider. It can be kept stable that the radiation gain and the radiation pattern of the proposed half-wavelength slot array in the impedance band. Besides, it is formed a quasi-open circuit of the slotline by the truncated ground plane. The size of the slot element and the composed array can be compact, and the impedance bandwidth can be improved. Plane sheet is used as a reflector to make the slot array unidirectional radiation. The bandwidth of the proposed quarter-wavelength slot array is wider than the half-wavelength slot array. And it is also kept stable that the radiation gains and the radiation pattern. A plane sheet is used as a reflector which cancels the backed radiation and improves the radiation gain to make the slot array unidirectional radiation. The design details of the above slot array antennas are depth discussed in this thesis and are proved with the simulation and measurement results.

口試委員審定書 i
致謝 iii
中文摘要 v
Abstract vii
Contents ix
List of Figures xi
List of Tables xiv
Chapter 1.Introduction 1
1.1 Motivation and literature survey 1
1.2 Chapter outlines 3
Chapter 2.Analysis of Slot and Slot Array 5
2.1 Modes and characteristics of center-fed slot 5
2.2 Modes and characteristics of offset-fed slot 6
2.3 Array theory 7
2.4 Radiation pattern calculation with a back reflector 11

Chapter 3.Design of Broadband Half-Wavelength Slot Array Fed by Microstrip Line 21
3.1 Broadband half-wavelength slot array fed by microstrip line 21
3.2 Design of 10GHz 1x4 slot array fed by microstrip line 22
3.3 Design of 10GHz 2x2 slot array fed by microstrip line 23
3.4 Design of 10GHz 4x4 slot array fed by microstrip line 24
3.5 Design of 10GHz 4x4 slot array with a back reflector 25
Chapter 4.Design of Broadband Quarter-Wavelength Slot Array Fed by Microstrip Line 49
4.1 Broadband quarter-wavelength slot array fed by microstrip line 49
4.2 Design of 5.5GHz 1

[1]Bhobe, A.U.; Holloway, C.L.; Piket-May, M.; Hall, R.;” Wide-band slot antennas with CPW feed lines: hybrid and log-periodic designs” IEEE Trans. Antennas Propagat., vol. 52, no. 10, pp.2545-2554, Oct. 2004
[2]Chien-Jen Wang; Jin-Jei Lee; Rey-Bin Huang; “Experimental studies of a miniaturized CPW-fed slot antenna with the dual-frequency operation” IEEE Antenna and wireless propagation Letters, Vol.2, no. 1, pp. 151-154, 2003
[3]Horng-Dean Chen;” Broadband CPW-fed square slot antennas with a widened tuning stub” IEEE Trans. Antennas Propagat., vol. 51, no. 8, pp. 1982-1986, Aug. 2003
[4]Chair, R.; Kishk, A.A.; Lee, K.F.; “Ultrawide-band coplanar waveguide-fed rectangular slot antenna” IEEE Antenna and wireless propagation Letters, Vol.3, no. 1, pp. 227-229, 2004
[5]Shih-Yuan Chen; Hsu, P.;” Broad-band radial slot antenna fed by coplanar waveguide for dual-frequency operation” IEEE Trans. Antennas Propagat., vol. 53, no.11, pp. 3448-3452, Nov. 2005
[6]Yeo, J.; Lee, Y.; Mittra, R.; “Wideband slot antennas for wireless communications” IEE Proc.-Microw, Antennas Propag., vol. 151, no.4, pp. 351-355, Aug. 2004
[7]J.-Y. Jan; C.-Y. Hsiang;” Wideband CPW-fed slot antenna for DCS, PCS, 3G and Bluetooth bands” Electronics Letters, Vol.42, no.24, pp. 1377-1378, Nov. 2004
[8]H. Kobayashi and Y. Yasuoka, “Slot-array antennas fed by coplanar waveguide for millimeter-wave radiation,” IEEE Transactions on Microwave Theory and Techniques, vol. 46, no. 6, pp. 800-805, June 1998.
[9]Azadegan, R.; Sarabandi, K.; “A novel approach for miniaturization of slot antennas” IEEE Trans. Antennas Propagat., vol. 51, no. 3, pp. 421-429, March 2003
[10]Jia-Yi Sze; Hsu, C.-I.G.; Sheng-Chin Hsu; “Design of a Compact Dual-Band Annular-Ring Slot Antenna” IEEE Antenna and wireless propagation Letters, Vol.6, pp. 423-426, 2007
[11]N. Behdad and K. Sarabandi, “A wide-band slot antenna design employing a fictitious short circuit concept,” IEEE Trans. Antennas Propagat., vol. 53, no. 1, part 2, pp. 475-482, Jan. 2005
[12]Sharma, S.K.; Shafai, L.; Jacob, N.;” Investigation of wide-band microstrip slot antenna” IEEE Trans. Antennas Propagat., vol. 52, no. 3, pp. 865-872, Mar. 2004
[13]S. I. Latif, L. Shafai, and S. K. Sharma, “Bandwidth enhancement and size reduction of microstrip slot antennas,” IEEE Trans. Antennas Propagat., vol. 53, no. 3, pp. 994-1003, Mar. 2005.
[14]K. Ito, K. Ohmaru, and Y. Konishi, “Planar antennas for satellite reception,” IEEE Transactions on Broadcasting, vol. 34, no. 4, pp. 457-464, Dec. 1988.
[15]Tulintseff, A.N.;” Series-fed-type linear arrays of dipole and slot elements transversely coupled to a microstrip line” IEEE AP-S, vol. 1, pp.128-131, Jul. 1993
[16]Elazar, G.; Kisliuk, M.; “Microstrip linear slot array antenna for X-band” IEEE Trans. Antennas Propagat., vol. 36, no. 8, pp. 11445-1147, Aug. 1988
[17]Qinjiang Rao; Denidni, T.A.; Johnston, R.H.; “A single-substrate microstrip-fed slot antenna array with reduced back radiation” IEEE Antenna and wireless propagation Letters, Vol.3, pp. 265-268, 2004
[18]Qinjiang Rao; Denidni, T.A.; Johnston, R.H.; “A new aperture coupled microstrip slot antenna” IEEE Trans. Antennas Propagat., vol. 53, no. 9, pp. 2818-2826, Sep.2005
[19]Shih-Yuan Chen; I-Ching Lan; Powen Hsu;” In-Line Series-Feed Collinear Slot Array Fed by a Coplanar Waveguide” IEEE Trans. Antennas Propagat., vol. 55, no. 6, Part 2, pp. 1739-1744, June 2007
[20]Liu, Y.; Shen, Z.; Law, C.L.;” A Compact Dual-Band Cavity-Backed Slot Antenna” IEE Proc.-Microw, Antennas Propag., vol. 5, no.1, pp. 4-6, Dec. 2006
[21]Yijun Liu and Zhongxiang Shen;”A compact Dual- and Wideband Cavity-Backed Slot Subarray” IEEE Antenna and wireless propagation Letters, Vol. 6, no.1, pp. 80-82, Jan. 2007
[22]Hirokawa, J.; Arai, H.; Goto, N.; “Cavity-backed wide slot antenna” IEE Proc.-Microw, Antennas Propag., vol. 136, no.1, pp. 29-33, Feb. 1989
[23]Wonbin Hong; Behdad, N.; Sarabandi, K.; “Size reduction of cavity-backed slot antennas”” IEEE Trans. Antennas Propagat., vol. 54, no. 5, pp. 1461-1466, May. 2006
[24]Byungje Lee; Harackiewicz, F.J.; Jung, B.; Myun-Joo Park;” Cavity-backed slot antenna array for the repeater system of a satellite digital multimedia broadcasting service” IEEE Antenna and wireless propagation Letters, Vol.4, pp. 389-392, 2005
[25]Quan Li; Zhongxiang Shen; “An inverted microstrip-fed cavity-backed slot antenna for circular polarization” IEEE Antenna and wireless propagation Letters, Vol. 1, no.1, pp. 190-192, 2002
[26]R.S.Elliott, Antenna Theory and Design, Englewood Cliffs, NJ:Prentice-Hall, 1981
[27]J. D. Kraus, Antennas, 2nd ed., Mcgraw-Hill, 1988
[28]Carlyle J. Sletten, Reflector and Lens Antennas: Analysis and Design Using Personal Computers, Artech House, 1988