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微波工程期中報告 Short-Term Project on Microwave Passive Planar Circuits: An Educational Approach 碩研電子一甲 M9930104 邱源祥 Isabelle Huynen, Robert Platteborze, Danielle Vanhoenacker-Janvier, André Vander Vorst, IEEE TRANSACTIONS ON EDUCATION, VOL. 43, NO. 2, MAY 2000. 前言 現代由於越來越多的微波應用，所以很多的教育機構都在發展專業微波工程， 但是微波設計和製造工具的測量儀器和相關花費都很昂貴，由於設備成本高學生 很少有機會完成所有的微波元件，而實驗室的文獻通常僅限於微帶應用。 在天主教魯汶大學的微波實驗室的微波教學有微波多層平面結構的研究方案， 在微波的研究和教育裡的專業技術和理論有很好的成就，與倫敦大學分析和設計， 儀器包括網絡分析儀、頻譜分析儀等，學生僅需一個星期就可完成設計和量測。 在本文所提出的微波教育是在倫敦大學學院所進行，培訓要求學生設計平面被動 式元件在0-40GHz，並畫出電路圖，量測其性能，讓學生提高基本能力。 Isabelle Huynen, Robert Platteborze, Danielle Vanhoenacker-Janvier, André Vander Vorst, IEEE TRANSACTIONS ON EDUCATION, VOL. 43, NO. 2, MAY 2000. TABLE I BASIC MICROWAVE ENGINEERING Week Lectures Homework Practice Proje ct 1 Microwaves in communication systems (Introduction) - - - 2 Microwave technologies (Introduction) - Sources (demonstration) - 3 Transmission lines - - - 4 Planar lines S-parameters - - 5 Obstacles Lines Slotted line (measurements) - 6 Junctions Lines - - 7 Matching Lines - - 8 1-port and 2-port Obstacles Obstacles/ Junctions Guidelines 9 Noise theory Obstacles - Design and simulation 10 Noise figure and power Junctions Network analyzer(vector) Mask drawing 11 Cavities - Network analyzer(scalar) Etching by technical staff 12 Non reciprocal devices 1-port /2ports - Measurements 13 Atmospheric transmission Noise - Measurements 14 Antenna Cavities - Report Fig. 1. Planar elements for MIC’s analyzed during project: (a) microstrip impedance transformer, (b) coplanar waveguide impedance transformer, (c) microstrip low-pass filter, (d) coplanar waveguide low-pass filter, (e) microstrip rat-race coupler, (f) microstrip 90 -hybrid coupler, (g) microstrip Wilkinson coupler, (h) microstrip bandpass filter, (i) microstrip patch antenna, and (j) slot antenna. (Dark areas are for metal and light gray areas for substrate layer.) Isabelle Huynen, Robert Platteborze, Danielle Vanhoenacker-Janvier, André Vander Vorst, IEEE TRANSACTIONS ON EDUCATION, VOL. 43, NO. 2, MAY 2000. (a) (b) Fig. 2. ASIMIC software built at UCL: (a) window from analysis module and (b) window from simulation module. Isabelle Huynen, Robert Platteborze, Danielle Vanhoenacker-Janvier, André Vander Vorst, IEEE TRANSACTIONS ON EDUCATION, VOL. 43, NO. 2, MAY 2000. Fig. 3. PENELOPE window. Isabelle Huynen, Robert Platteborze, Danielle Vanhoenacker-Janvier, André Vander Vorst, IEEE TRANSACTIONS ON EDUCATION, VOL. 43, NO. 2, MAY 2000. TABLE II MINIMUM STRIP AND SLOT WIDTHS ACHIEVABLE AT UCL Microstrip Slot line Units Dry film Liquid photoresist Dry film Liquid photoresist Micrometer 80 50 100 70 Degrees 45 45 65 65 Uncertainty due to etching Micrometer -5 -15 -5 -15 15-25 15-25 Limiting range for Wmin actual obtained After etching Micrometer 65 -75 35-45 115125 89-95 Minimum width Wmintheo achievable by Resist deposition Slope angle theta after etching Isabelle Huynen, Robert Platteborze, Danielle Vanhoenacker-Janvier, André Vander Vorst, IEEE TRANSACTIONS ON EDUCATION, VOL. 43, NO. 2, MAY 2000. (a) (b) Fig. 4. UCL-made test fixture: (a) topology and (b) schematic view of metallic support. Isabelle Huynen, Robert Platteborze, Danielle Vanhoenacker-Janvier, André Vander Vorst, IEEE TRANSACTIONS ON EDUCATION, VOL. 43, NO. 2, MAY 2000. Fig. 5. Realization of a coplanar impedance transformer: (a) simulation using 200- and 100- reference loads, (b) measurement, and (c) simulation using 50-reference loads. Isabelle Huynen, Robert Platteborze, Danielle Vanhoenacker-Janvier, André Vander Vorst, IEEE TRANSACTIONS ON EDUCATION, VOL. 43, NO. 2, MAY 2000. Fig. 6. Realization of a rat-race coupler: (a) mask and (b) experimental configuration. Isabelle Huynen, Robert Platteborze, Danielle Vanhoenacker-Janvier, André Vander Vorst, IEEE TRANSACTIONS ON EDUCATION, VOL. 43, NO. 2, MAY 2000. 結論 該計畫的基本微波工程是一個很好的例證，它處理從寬帶應用到毫 米波。如在工業的最新研究發展中的麥克風的領域。 對於本科學生有非常好的幫助，對於學生決定其畢業論文有更好的 項目，很多學生參與其培訓課程後，現在都在從事微波應用方面的 工作。 Isabelle Huynen, Robert Platteborze, Danielle Vanhoenacker-Janvier, André Vander Vorst, IEEE TRANSACTIONS ON EDUCATION, VOL. 43, NO. 2, MAY 2000.