隨著無線通訊科技的演進，無線產品也因應便利性和可攜性而做得更小更輕薄，因為縮小化，有限的內部空間會使不同頻率和功能的元件更加靠近，元件之間的干擾就變得更嚴重，像是手機上液晶顯示器的接頭端就容易被GSM/CDMA/LTE天線頻段影響。為了解決這個問題，我們在本論文設計了一個四合一的低截止頻率電磁干擾濾波器陣列降低來自高頻段的雜訊，此濾波器有從700至2500 MHz的寬抑制頻帶，抑制頻段也有很低的插入損失，也利用接地面包住每個通道的電容來增加通帶的隔離度。
為了應用的方便性，我們結合了四個濾波器在一個晶片裡，當裝置需要多通道濾波器時，就可以為裝置省下更多空間。另外，此濾波使用了LTCC製程，來達到1.6 mm × 0.8 mm × 0.5 mm的小尺寸。

With the development of modern wireless communication technology, wireless products become more compact and low-profile for convenience and portability. Because of the miniaturization, limited inner space requires elements of different frequencies and functions to be placed closer and interference become more serious between elements. For example, the connectors of LCD signal wires can be affected by GSM/CDMA/LTE band which are used for antennas in mobile phone easily. To solve this problem, a four-in-one electromagnetic interference (EMI) filter array with low cutoff frequency is designed to suppress interference in the high frequency band in this thesis. This filter has low cutoff frequency, wide rejection band from 700 to 2500 MHz, low insertion loss at stopband. The capacitor of each channel is also covered by ground to obtain good isolation at pass band.
To be easily applicable, we combine four filters into one chip so that devices can save more space when multiple EMI filters are required. In addition, this filter presents a small size of 1.6 mm × 0.8 mm × 0.5 mm by using low-temperature co-fired ceramic (LTCC) technology with multi-layer structure.

誌 謝 ii
摘　要 iii
Abstract iv
目 錄 v
第一章 序論 1
1.1研究背景和動機 1
1.2 研究方法和目的 1
1.3 章節介紹 3
第二章 EMI濾波器和LTCC介紹 4
2.1 EMI濾波器介紹 4
2.2 LTCC介紹 7
第三章 陣列式濾波器設計 12
3.1濾波器架構 12
3.2 四通道濾波器三維結構 18
3.3 實作與測量 38
3.4 相關產品比較 42
第四章 結論 44
參考文獻 45

[1] Murata Manufacturing Co. Ltd., 2004, Basics of EMI Filters [Online]. Available: http://www.murata.com/
[2] L. K. Yeng, K. L. Wu, and Y. E. Wang, “Low-temperature cofired ceramic LC filters for RF applications,” IEEE Microw. Mag., vol. 9, no. 5, pp. 118-128, Oct. 2008
[3] L. K. Yeung and K.-L Wu, “A compact second-order LTCC bandpass filter with two finite transmission zeros,” IEEE Trans. Microw. Theory Tech., vol. 51, no.2, pp. 337-341, Feb. 2003.
[4] M. Reppel, “Electromagnetic analysis of LTCC high frequency devices”, Microwave Engineering Europe, pp. 25–30, July 2003.
[5] 陳麗如,“利用LTCC來實現符合802.11a/b/g 規範的碎形Balun”, 國立中山大學電機工程學系 碩士論文, 2007
[6] 翁敏航(2006)，射頻被動元件設計，台北：台灣東華書局。
[7] I. Wolff, “Design and technology of microwave and millimeter-wave LTCC circuits and systems,” 2007 International Symposium on Signals, Systems and Electronics (ISSSE '07), pp. 505-512, July 30 - Aug. 2, 2007.
[8] Dr.S. Vasudevan, “What is LTCC?-Introduction,” http://www.digitimes.com.tw
[9] http://microwave.ee.cuhk.edu.hk/microwave/www_mwave/Research_LTCC.html
[10] T. Yang, M. Tamura, and T. Itoh, “Super compact low-temperature co-fired eramic bandpass filters using the hybrid resonator,” IEEE Trans. Microw. Theory Tech., vol. 58, no. 11, pp. 2896-2907, Nov. 2010.
[11] D. M. Pozar, Microwave Engineering 3rd edition. New York: Wiley, 2003.
[12] TDK Manufacturing Co. Ltd. , datasheet [Online]. Available: http://www.tdk.com/
[13] Kyocera Manufacturing Co. Ltd., datasheet [Online]. Available: http://global.kyocera.com/