電磁雜訊濾波器及其等效濾波電路ELECTROMAGNETIC NOISE FILTER DEVICE AND EQUIVALENT FILTER CIRCUIT THEREOF

專利類型

發明

專利國別 (專利申請國家)

美國

專利申請案號

14/558,848

專利證號

US 9,655,230 B2

專利獲證名稱

電磁雜訊濾波器及其等效濾波電路ELECTROMAGNETIC NOISE FILTER DEVICE AND EQUIVALENT FILTER CIRCUIT THEREOF

專利所屬機關 (申請機關)

國立臺灣大學

獲證日期

2017/05/16

技術說明

近年來製程的進步，尚有一種可利用低溫或高溫共燒陶瓷技術( LTCC/HTCC)製作出一多層結構濾波器，雖然抑制電磁雜訊的效果不錯，然而低溫共燒製程非常昂貴，且此濾波器往往也只能工作在低頻範圍(例如：750MHz~1GHz)內。吾團隊發明有關於一種電磁雜訊濾波器及其等效濾波電路，濾波器包括一基板，基板之上表面設置一傳輸線，而下表面設置一蝕刻有一槽狀式接地結構之接地面，並在槽狀式接地結構中設置至少一對阻抗元件，於傳輸線、槽狀式接地結構及阻抗元件間將可形成一濾波器的等效濾波電路，藉此，等效濾波電路可以利用阻抗元件吸收至少一特定頻率之電磁雜訊，以避免電磁雜訊進行反射而影響到訊號傳輸的品質。 The present invention is related to an electromagnetic noise filter device and an equivalent filter circuit thereof. The filter device comprises a substrate, a transmission line and a ground plane having slotted ground structure. The transmission line is configured on the top surface of the substrate, and the grounding plane is configured on the bottom surface of the substrate. At least one pair of impedance elements are configured within the slotted ground structure. The transmission line can be electromagnetic coupled to the slotted ground structure and the impedance elements so as to form an equivalent filter circuit. Thereby, the electromagnetic noises on at least one specific frequency may be absorbed by the impedance elements of the filter device so as to avoid the electromagnetic reflection induced by the electromagnetic noise and interfering the signal transmitted on the transmission line.

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