近年來，由於固態微波元件及半導體技術的進步，使得各種應用，如在：汽車、飛機、無線電話、防盜器、火警預報器等，均可利用微波元件製成，其中因微波通信可容納數目極大的通信頻道，被視為最為熱門。而在所有平面傳輸線中最為熱門的乃是微帶傳輸線，此乃因為其製程簡單，且與其他主動或被動的微波元件均可良好的整合在一起。
利用微帶線來傳輸電磁波訊號時，需考慮所設計的微帶線幾何形狀、鍍膜的材料、性質…等，因其皆會改變電磁波於其上的損耗程度，進而影響我們接收到的電磁波強弱。
實驗上，我們主要是利用T型結構的微帶線，使用熱蒸鍍以及直流濺鍍製作樣品後，再分別使用網路分析儀及四點量測系統，量測微波頻段和直流情況下，其不同金屬電導率與頻率以及溫度的響應。

Recently,due to the improvements of solid microwave devices and semiconductor technology,many applications have been realized in
cars,airplanes,cellphones,fire alarms,wireless communication systems,
Global Positioning System(GPS),etc.All of these applications above could be made by microwave devices.And microstrip line is the hottest one of the planar transmission lines because of its simple fabrication and excellent integration with other active or passive microwave devices.

While using microstrip lines to transmit microwave signals, the structure of microstrip lines ,the characteristics and materials of coating films should all be taken into considerations,because all of them will lead to the attenuations of transmission signals,and then will affect the amplitudes of the receiving signals.

In our experiments,we use the T-type structure of microstrip lines for its good resonance spectra.All of our samples were fabricated by two processes individually called thermal evaporation and DC sputtering.
The following process is the measurement.Under the microwave frequency,we measure the Q-factors and resonance frequencies by vector
network analyzer(VNA).And under DC circumstance,we measure the R-T curves of coating films by four point test.Our goal is to know the
frequency response and temperature response for different kinds of metals under microwave frequency and DC circumstances.

[1] A.A. Abrikosov, “Fundamentals of the Theory of Metals, “ North-Holland,1988
[2] David M. Pozar 著,郭仁財譯,”微波工程”,pp61-65,”高立圖書”,2003
[3] 張盛富,戴明鳳, ”無線通信之射頻被動電路設計,”全華圖書,1997
[4] Wheeler, H. A., “Transmission line properties of parallel wide strips by a conformal mapping approximation, “IEEE Trans., Vol. MTT-12, pp. 280-289, 1964
[5] Wheeler, H. A., “Transmission line properties of parallel strips separated by a dielectric sheet, “IEEE Trans., Vol. MTT-13, pp. 172-185, 1965
[6] Wheeler, H. A., “Transmission line properties of a strip on a dielectric sheet on a plane, “ IEEE Trans., Vol. MTT-25, pp. 631-647, 1977
[7] R. P. Owens, “Predicted frequency dependence of microstrip characteristic impedance using the planar waveguide model,” Electronics Letters, vol 12, pp. 269-270, May 1976.
[8] T. C. Edwards and R. P. Owens, “2-18 GHz dispersion measurements on 10-100 ohm microstrip lines on sapphire,” IEEE Trans. MTT, vol. MTT-24, pp. 505-513, Aug. 1976
[9] M. Kobayashi, “Important role of inflection frequency in the dispersive properties of microstrip line,” IEEE trans. Microwave Theory Tech., vol. MTT-30, pp. 2057-2059, Nov. 1982
[10] K. C. Gupta, R. Garg and I. J. Bahl, Microstrip Lines and slotlines, Dedham, MA: Artech House, Inc., 1996.

[11] R. A. Pucel, et al., “Losses in microstrip,” IEEE trans. MTT, vol. MTT-16,pp. 342-350, June 1968.
[12] 孫又予, “微波電路學, ”國立編譯館,1992
[13] Samuel Y. Liao, “Microwave Devices and Circuits,”Prentice-Hall,
pp.481-482,1990
[14] T. C. Edwards, Foundations for Microstrip Circuit Design, New York: John Wiley&sons, 1983.
[15] J. R. James and A. Henderson, “High frequency behavior of microstrip open-circuit termination,” IEE Journal on Microwaves, Optics and Acoustics, vol. 3, pp. 205-218, Sept. 1979
[16] Anand Gopinath, "Maximum Q-Factor of Microstrip Resonator, "IEEE Trans. Microwave Theory Tech., vol. MTT-29, No. 2, pp.128-131
[17] D. Pozar , "Microwave Engineering,"ReadingMA:Addison-Wesley, pp.330-335,1990
[18] M. Kirschning "Accurate Model for Open End Effect of Microstrip Lines,"Electronics Letters, vol. 17, No.3,pp.123-125, 1981
[19] George D. Vendelin, "Limitations on Stripline Q, "The Microwave Journal,pp63-69, 1970
[20] Reinmut K. Hoffmann, "Handbook of microwave intergrated circuits, " Artech House , 1987
[21] J. carroll, M. Li, and Chang "New Technique to Measure Transmission Line Attenuation, " IEEE Trans. Microwave Theory Tech., vol. 43, No. 1, pp.219-222, 1995
[22] 呂助增, “固態電子學, ”國立編譯館,1996
[23] Yu.M GALPERIN ,V.L. GUREVICH and D.A. PARSHIN,”Non-Ohmic microwave hopping conductivity”,”Modern problems in condensed matter sciences”,vol.28,chap3,pp.81-85,1991