本論文提出應用於粉粒體流量偵測指向性天線，分別為24 GHz 1×4微帶陣列天線、圓錐號角天線和槽紋號角天線，24GHz 1×4陣列天線饋入網路採等分功率設計，其量測最大增益為8.9 dBi，板材採用Rogers RO4003C玻璃纖維介質板，擁有低的介電常數3.55和極低的介質損耗0.0027，非常適合應用於毫米波頻段，為了讓量測距離提升，設計了圓錐號角和槽紋號角天線，製作材料為鋁，兩款號角天線皆使用24 GHz微帶陣列天線饋入，可以將24 GHz微帶陣列天線的輻射波束更加集中使增益提高，圓錐號角天線經由理論計算和模擬，增益設計為20 dBi，槽紋號角天線結構尺寸與圓錐號角天線一樣，但在光滑內壁上加工了 的槽紋，用微帶陣列天線饋入實際量測的增益為17.6 dBi，與單獨24 GHz陣列天線的增益相比提升了8.7 dBi。

This thesis proposes directive antennas for powder materials flow measurement which are 24 GHz 1×4 microstrip patch array antenna, conical horn antenna and corrugated horn antenna. The 24 GHz 1×4 array antenna feed network adopts equal power design, and its maximum measured gain is 8.9 dBi, the substrate uses Rogers RO4003C, has a low dielectric constant of 3.55 and extremely low dielectric loss of 0.0027. It is very suitable for use in the millimeter wave band.In order to improve the measurement distance, conical horn and corrugated horn antennas are designed and made of aluminum. Both horn antennas are fed using a 24 GHz microstrip array antenna. The radiation beam of the 24 GHz microstrip array antenna can be more concentrated to increase the gain. Theoretical calculations and simulations show that the gain is designed to be 20 dBi. The corrugated horn antenna has the same structural dimensions as the conical horn antenna, but the grooves machined on the smooth inner wall are combined with the microstrip array antenna to measure the overall antenna gain of 17.6 dBi. Compared with the gain of a 24 GHz array antenna, it is improved by 8.7 dBi.

中文摘要 i
英文摘要 ii
誌謝iv
目錄v
圖目錄vii
第一章 緒論1
1.1研究背景1
1.2 研究動機2
1.3論文大綱3
第二章　天線基礎和粉粒體流量偵測原理4
2.1 天線參數4
2.1.1反射損耗和電壓駔波比4
2.1.2增益5
2.1.3輻射場型6
2.2 粉粒體流量偵測原理7
2.3 微帶陣列天線理論8
2.3.1 微帶天線阻抗匹配11
2.3.2陣列天線14
2.4 號角天線理論16
2.4.1圓錐號角天線17
2.4.2槽紋號角天線19
第三章　微帶陣列天線與號角天線模擬與分析20
3.1 24 GHz微帶陣列天線模擬與設計20
3.2 圓錐號角與槽紋號角天線模擬28
3.3 圓錐與槽紋號角天線使用微帶陣列饋入模擬32
第四章 微帶陣列天線與號角天線量測結果35
4.1 24 GHz微帶陣列天線量測結果35
4.2圓錐與槽紋號角天線使用微帶陣列饋入量測結果38
4.3圓錐與槽紋號角天線量測距離比較42
第五章 結論與未來與展望44
參考文獻45

[1] P. Fiala, M. Steinbauer and Z. Szabo, “Using an Electromagnetic Flowmeter for Ultra-low Velocity Measurement,” in Proc PhotonIcs & Electromagnetics Research Symp. Spring, Rome, Italy, 2019, pp. 3767-3771.
[2] L. Slavik, J. Rosicky and M. Novak, “Optimization of Magnetic Circuit in Electromagnetic Flow Meter,” 17th International Carpathian Control Conf. (ICCC), Tatranska Lomnica, 2016, pp. 688-691.
[3] Hamid and S. S. Stuchly, “Microwave Doppler-Effect Flow Monitor,” IEEE Trans. Industrial Electronics and Control Instrumentation, vol. 22, no. 2, pp. 224-228, May 1975.
[4] Penirschke and R. Jakoby, “Design of a Moisture Independent Microwave Mass Flow Detector for Particulate Solids,” German Microwave Conf. Digest of Papers, Berlin, 2010, pp. 130-133.
[5] M. J. Veljovic and A. K. Skrivervik, “Circularly Polarized Axially Corrugated Feed Horn for CubeSat Reflectarray Applications,” 2020 14th European Conf. on Antennas and Propag. (EuCAP), Copenhagen, Denmark, 2020, pp. 1-4.
[6] C. A. Balanis, Antenna Theory Analysis and Design, John Wiley and Sons, Hoboken, pp. 25- 30, 2016.
[7] M. Isa and Z. Wu, “Microwave Doppler Radar Sensor for Solid Flow Measurements,” European Microwave Conf., Manchester, 2006, pp. 1508-1510.
[8] M. I. Skolnik, Introduction to Radar Systems, New York, McGraw Hill, 2002.
[9] B. T. Chorpening, M. Spencer, et al., “Doppler Sensing of Unsteady Dense Particulate Flows,” IEEE Sensors, Orlando, 2016, pp. 1-3.
[10] G. A. Deschamps, “Microstrip Microwave Antennas,” in Proc the Third USAF Symp. on Antennas, 1953.
[11] H. Gutton and G. Baissinot, “Flat Aerial for Ultra High Frequencies,” French Patent no. 703 113, 1955.
[12] R. J. Mailloux, J. F. Mcilvenna, and N. P. Kernweis, “Microstrip Array Technology,” IEEE Trans. Antennas Propag. vol. 29, no. 1, Jan. 1981.
[13] W. L. Stutzman and G. A. Thiele, Antenna Theory and Design, John Wiley and Sons, New York, May, 2012.
[14] P. King, “The Radiation Characteristics of Conical Horn Antennas,” in Proc. I. R. E, pp. 249-251, 1950.
[15] F. Kay, “The Scalar Feed,” AFCRL Rep. 64–347, AD601609, Mar. 1964.
[16] P. Piksa, “Comparison of Conical Horn with Optimized Corrugated Surface and Corrugated Horn,” in Proc 21st Inter., Conf. Radio, 2011.
[17] J. E. McKay, D. A. Robertson, P. J. Speirs, et al., “Compact Corrugated Feedhorns with High Gaussian Coupling Efficiency and -60 dB Sidelobes,” IEEE Trans. Antennas Propag. vol. 64, no. 6, pp. 2518-2522, June, 2016.
[18] Densmore, Y. R. Samii, and G. Seck, “Corrugated-Conical Horn Analysis Using Aperture Field with Quadratic Phase,” IEEE Trans. Antennas Propag. vol. 59, no. 9, pp. 3453-3457, Sept. 2011.
[19] Agnihotri and S. K. Sharma, “Design of a 3D Metal Printed Axial Corrugated Horn Antenna Covering Full Ka-Band,” IEEE Antennas and Wireless Propag. Letters, vol. 19, no. 4, pp. 522-566, April, 2020.
[20] T. Millagan, “Design of Broadband Constant-Beamwidth Conical Corrugated-Horn Antennas,” IEEE Antennas Propag. Magazine. vol. 51, no. 5, pp. 109-114, Oct. 2009.
[21] U. Deva, C. Saha and J. Y. Siddiqui, “Reflector Backed High Gain Photoconductive THz Antenna Using Conical GaAs Horn and Si Lens,” IEEE Intern. Symp. on Antennas and Propag. & USNC/URSI National Radio Science Meeting, San Diego, CA, 2017, pp. 1757-1758.
[22] M. K. T. Al-Nuaimi, W. Hong and Y. Zhang, “Design of High-Directivity Compact-Size Conical Horn Lens Antenna,” IEEE Antennas and Wireless Propag. Letters, vol. 13, pp. 467-470, 2014