計畫名稱：具有系統性匹配電路設計之低通與帶通雙工器
執行起迄：2014/08/01~2015/07/31
總核定金額：605,000元
中文摘要：一利用簡單清楚的匹配設計之低通帶通雙工器，首先在2013年被提出，但其需要額外的匹配線段介在低通濾波器與帶通濾波器之間，為了改善這項問題，本計畫發展四種具有整合匹配電路之低通帶通雙工器，亦即，所提出之雙工器不需要額外的匹配電路在濾波器之間，根據所提出的設計，高度電路面積的使用效率可以被達成，在帶通通道，耦合饋入線耦合共振器濾波器與直接饋入耦合共振器濾波器可以被選擇，此外，提出之雙工器，在低通通道使用兩種不同型態之等效階梯電路。
英文摘要：A lowpass-bandpass diplexer (LBD) with simple clear matching design was first presented in 2013; however, it needed extra matching line between lowpass and bandpass filters. To improve this issue, this program develops four microstrip lowpass-bandpass diplexers (LBDs) with integrated matching circuits, i.e., the proposed diplexers without extra matching circuits between filters. Based on the proposed designs, high circuit arrangement efficiency can be achieved. For the bandpass channels, coupled-feed-line coupled-resonator filter and direct-feed coupled-resonator filter could be selected in the first three diplexers and the last diplexer, respectively. Besides, the presented diplexers use two different types of equivalent ladder circuits in lowpass channels.