本論文的內容是整合非理想接地的饋入網路與平面天線的設計架構，來實現天線多頻且寬頻操作的功能，並針對增加天線阻抗頻寬之特性作分析與探討。主要的研究方法是先依預定的天線規格(尺寸及效能)產生設計的概念，再實際製作天線實體，並將量測實驗結果與學理相互驗證，以實驗研究來修正天線的設計，得到符合規格的最佳化結果。首先，從印刷電路板的非理想接地的模組化等效電路開始，以傳輸線理論為基本架構，探討接地面積對電磁輻射效應的影響。接著再結合平面天線的等效電路結構，利用高斯濾波器的頻率響應分析非理想接地對天線的阻抗頻寬、激發模態、交叉極化位準及輻射場型所造成的影響。最後提出五種小型化、低剖面的印刷天線來驗證非理想接地對天線特性所產生的影響。為顧及天線的實用性，本論文所提出的天線設計概念，均屬於架構簡單且易於組裝的型式，並且具有多頻、寬頻及全向性輻射的特點。

In this thesis, we present some concept that combine feeding network with imperfect ground-plane and printed antenna design to realize multi-frequency and wide-band antennas. The method to improve antenna impedance bandwidth is also analyzed and discussed.
The main research tasks are the development of antenna design concepts, implementation and measurements of small multi-band antennas. The “small antenna” here is defined as antenna’s ground structure that is smaller than antenna itself. The antenna design concepts are verified by experimental study.
The equivalent circuit of imperfect ground-plane of the printed circuit boards (PCBs) serves as the foundation to investigate the radiation mechanisms of small radiation elements. We then study the effect of imperfect ground plane on radiation impedance, bandwidth response, polarization and radiation patterns of printed antenna. Finally, five miniaturized, low profile printed antenna types were presented to verify the effect of imperfect ground-plane on the performance of printed antennas.

[23]. R. Khazaka and M. Nakhla. ”Analysis of high-speed interconnects in the presence of electromagnetic interface,” IEEE Trans. Microwave Theory Tech., vol. 46, pp.940-947, July. 1998.
[24]. Ott, H. W. “Noise Reduction Techniques in Electronic System”, Wiely, New York, 1988.
[25]. Chen, K. C., and K. M. Damrau, “Accuracy of Approximate Transmission Line Formulas for Overhead Wires,” IEEE Trans. Electromagn. Compat., Vol. EMC-31, No. 4, Nov, 1989.
[26]. Neff, H. P., and D. A. Reed, “The effects of secondary Scattering on the Induced Current in an Infinite Wire over an Imperfect Ground from an Incident Electromagnetic Pulse,” IEEE Trans. Antennas Propag., Vol. AP-37, Dec, 1989.
[27]. R.F. German, H.W. Ott and C.R. Paul. “Effect of an Image Plane on Printed Circuit Board Radiation,” IEEE International Symposium on Electromagnetic Compat. Washington, pp.284-291, Aug. 1990.
[28]. David M. Hockason, James L.Drewniak, Todd H. Hubing, Thomas P. Van Doren, Fei Sha and Micheael J. Wilhelm. ”Investigation of Fundamental EMI Source Mechanisms Driving Common-Mode Radiation from Printed Circuit Boards with Attached Cables,” IEEE Trans. Electromagn. Compat., vol. 38, pp.557-565, Nov. 1996.
[29]. R.W. Dockey and R.F. German. “New techniques for Reducing Printed Circuit Boards Common-Mode Radiation,” IEEE Procs. Electromagn Compact. Soc., Dallas, Tx, pp.334-339, Aug. 1993.
[30]. Paul, C. R., “Transmission Line Modeling of Shielded Wires for Crosstalk Prediction,” IEEE Trans. Electromagn. Compat., Vol. EMC-23, pp. 345-351, Nov. 1981.
[31]. Clayton R. Paul. “A Comparison of the Contributions of Common-Mode and Differential-Mode Currents in Radiations,” IEEE Trans. Electromag. Compat., vol.31, pp.189-193,May. 1989.
[32]. Frederick M. Tesche, Michel V. Ianoz and Torbjorn Karlsson. “EMC Analysis Methods and Computational Methods,” John Wiely & Sons, Inc., 1997.
[33]. David K. Cheng. “Field and Wave Electromagnetics,” Addison Wiely, Inc., 1989.
[34]. M. I. Montrose, “Printed circuit board design techniques for EMC compliance”, IEEE Press, 2000.
[35]. Gravelle, L. B., and P. F. Wilson, “EMI/EMC in Printed Circuit Boards: A literature Review,” IEEE Trans. Electromagn. Compat., Vol. EMC-34, pp. 109-116, May. 1992.
[36]. Clayton R. Paul “Analysis of Multiconductor Transmission Lines,” John Wiley & Sons, Inc., 1994.
[37]. C. L. Holloway and E. F. Kuester. “Net and Partial Inductance of Microstrip Ground Plane,” IEEE Trans. Electromag. Compat. , vol.40, pp.35-45, Feb. 1998.
[38]. F. B. Leferink and M, J. C. M. van Doorn. “Inductance of Printed Circuit Board Ground Plane,” in Proc. 1993 IEEE Int. Sypm. Electromag. Compat. , Dallas, TX, pp.327-329, Aug. 1993.
[39]. Sergey L. Loyka. “A Simple Formula for the Ground Resistance Calculation,” IEEE Trans. Electromag. Compat. , vol.41, pp.152-154, May. 1999.
[40]. Michel Mardiguian. “A Handbook Series on Electromagnetic Interference and Compatibility,” Interference Control Technologies, Inc., vol.2, 1988.
[41]. D.M. Pozar. “Microwave Engineering,” Addison-Wesley., 1990.
[42]. Robert S. Elliott. “Antenna theory and design,” Prentice-Hall, Inc. , Englewood Cliffs, New Jersey 07362, 1981.
[43]. Tesche, F. M., “On the Behavior of Thin-Wire Antennas and Scatters Arbitrarily Located Within a Pallel-plate Region,” IEEE Trans. Antennas Propag. Vol. AP-20, July, 1972.
[44]. J. D. Kraus. “Anyennas”, McGraw-Hill Book Co., Inc., New York,” 1950.
[45]. R. W. Dockey. “Asymmetrical Mode Radiation from Multi-layer Printed Circuit Boards,” EMC / ESD International Symposium, Denver. , pp.22-24, April. 1992.
[46]. John T. Fessler, Keith W. Whites, and Clayton R. Paul. “The Effectiveness of an Image Plane in Radiated Emissions,” IEEE Trans. Electromag. Compat. , vol.38, pp.51-61, Feb. 1992.
[47]. Colvin, D. H., “Computationally Efficient Method of Calculations Involving Lumped-Parameter Transmission-Line Models,” IEEE Trans. Electromagn. Compat., Vol. EMC-27, No. 1, Feb. 1986.
[48]. Yen-Liang Kuo; Kin-Lu Wong: ‘Printed double-T monopole antenna for 2.4/5.2 GHz dual-band WLAN operations’, IEEE Trans. on Antennas and Propag., Vol. 51, No.9, pp. 2187 – 2192, Sep., 2003.
[49]. Hua-Ming Chen; Yi-Fang Lin; Chin-Chun Kuo; Kuang-Chih Huang: ‘A compact dual-band microstrip-fed monopole antenna’, 2001 IEEE International symposium on Antennas and Propagation Society, Vol.2, pp. 124 – 127, 8-13 July, 2001.
[50]. Tai-Lee Chen: ‘Multi-band printed sleeve dipole antenna’, Electronics Letters, Vol. 39, No. 1, pp. 14-15, Jan., 2003.
[51]. O. Staub, J.F. Zurcher, and A. Skrivervlk: ‘Some Considerations on the Correct Measurement of the Gain and Bandwidth of Electrically Small Antennas,’ Microwave and Optical Technology Letters, Vol. 17, No. 3, pp. 156-160, Feb., 1998.
[52]. James S. McLean: ‘A Re-Examination of the Fundamental Limits on The Radiation Q of Electrically Small Antennas,’ IEEE Trans. on Antennas and Propag., Vol. 44, No. 5, pp. 672-675, May, 1996.
[53]. Pertti Vainikainen, Jani Ollikainen, Outi Kivekäs, and Ilkka Kelander: ‘Resonator-Based Analysis of the Combination of Mobile Handset Antenna and Chassis,’ IEEE Trans. on Antennas and Propag., Vol. 50, No. 10, pp. 1433-1444, OCT., 2002.
[54]. K. Ram babu, M. Ramesh and A.T. Kalghatgi: ‘Broadband equivalent circuit of a dipole antenna,’ IEE Proc.-Microw. Antennas Propag., Vol. 146, No. 6, pp. 391-393, DEC., 1999.
[55]. Cesar Monzon: ‘Analytical Derivation of a Two-Section Impedance
Transformer for a Frequency and Its First Harmonic,’ IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, Vol. 12, No. 10, pp. 381-382, OCT. 2002.
[56]. Paul, C.R.: ‘Introduction to electromagnetic compatibility’, Wiley,
New York, 1992.
[57]. Paul, C.R.: ‘Analysis of Multiconductor Transmission Lines’,
Wiley, New York, 1994.
[58]. Leferink, F.B., and van Doorn, M.J.C.M.: ‘Inductance of printed
circuit board ground plane’. Proc. IEEE Int. Symp. on Electromagnetic Compatibility, Dallas, TX, pp. 327–329, August, 1993.
[59]. Mardiguian, M.: ‘A handbook series on electromagnetic interference
and compatibility’, Interference Control Technologies Gainesville,
VA, 1988.
[60]. Reinmut K. Hoffmann.: ‘Handbook of Microwave Integrated
Circuits’, Artech House, 1987.
[61]. Kneppo, I.; Gotzman, J.: ‘Basic Parameters of Nonsymmetrical Coplanar Line’, IEEE Trans. on Microwave Theory and Tech., Vol. 25, No. 8, pp. 718, AUG.., 1977.
[62]. Yen-Liang Kuo; Kin-Lu Wong: ‘Printed double-T monopole antenna for 2.4/5.2 GHz dual-band WLAN operations’, IEEE Trans. on Antennas and Propag., Vol. 51, No.9, pp. 2187 – 2192, Sep., 2003.
[63]. Hua-Ming Chen; Yi-Fang Lin; Chin-Chun Kuo; Kuang-Chih Huang: ‘A compact dual-band microstrip-fed monopole antenna’, 2001 IEEE International symposium on Antennas and Propagation Society, Vol.2, pp. 124 – 127, 8-13 July, 2001.
[64]. Tai-Lee Chen: ‘Multi-band printed sleeve dipole antenna’, Electronics Letters, Vol. 39, No. 1, pp. 14-15, Jan., 2003.
[65]. Staub, J.F. Zurcher, and A. Skrivervlk: ‘Some Considerations on the Correct Measurement of the Gain and Bandwidth of Electrically Small Antennas,’ Microwave and Optical Technology Letters, Vol. 17, No. 3, pp. 156-160, Feb., 1998.
[66]. James S. McLean: ‘A Re-Examination of the Fundamental Limits on The Radiation Q of Electrically Small Antennas,’ IEEE Trans. on Antennas and Propag., Vol. 44, No. 5, pp. 672-675, May, 1996.
[67]. T. HUYANH and K.-F. Lee:’Single-layer single-patch wideband microstrip antenna’, Electron. Lett., 1995, 31, (16), pp. 1310-1312.
[68]. ZŰRCHER, J.-F., and GARDIOL, F.Ė.:’Broadband patch antennas’, Artech House, Inc., 1995.
[69]. J. YANG, J. LITVA, C. WU and T. TAM:’Practical microstrip dual-ring antenna’, Electron. Lett., 1996, 32, (6), pp. 511-512.
[70]. MANSHADI, F.:’End-loaded crossed-slot radiating elements’, IEEE Trans. Antennas Propag., 1991, 39, (8), pp. 1237-1240.
[71]. Young-Ho and Kai Chang: ’Low cost microstrip-fed dual frequency printed dipole antenna for wireless communications’, Electron. Lett., vol. 36, pp. 1177-1179, July, 2000.
[72]. C. Delaveaud and C. Brocheton: ’Dual-band behaviour of printed dipole’, Electron. Lett., vol. 36, pp. 1175-1177, July, 2000.
[73]. Ramiro Jordan and Chaouki T. Abdallah: ’Wireless communications and networking: An overview’, IEEE Antennas Propag. Mag. (USA), 2002, 44, (1), pp. 185-193.
[74]. J.-D. Kraus and R.-J. Marhefka : ’Antennas’, McGraw-Hill, Inc., 2002.
[75]. H. Morishita, Y. Kim, Y. Koyanagi, and K. Fujimoto, “A folded loop antenna system for handsets”, in Proc. IEEE Antennas and Propagation Society Int.Symp., vol. 3, Boston, MA, 2001, pp. 440-443.
[76]. Karlo Queiroz da Costa, Victor Dmitriev, and Anderson Oliveira Silva, “A broadband combined (linear and loop) antenna above a ground plane”, IEEE International Workshop on Antenna Technology, March, 2006, pp. 80-83.
[77]. James S. McLean, “A Re-Examination of the Fundamental Limits on The Radiation Q of Electrically Small Antennas”, IEEE Trans. on Antennas and Propagation. Vol. 44, No. 5, pp. 672-675, May. 1996.
[78]. Yiyan Wu, Ewa Pliszka, Bernard Caron, Pierre Bouchard, and Gerald Chouinard: ’ Comparison of Terrestrial DTV Transmission Systems: The ATSC 8-VSB, the DVB-T COFDM, and the ISDB-T BST-OFDM’, IEEE Trans. Broadcasting. Vol. 46, pp. 101-113, June, 2000.