使用氧化鋁及低溫共燒陶瓷製程之基版合成波導設計具傳輸零點之V-band濾波器

Abstract

在毫米波頻段有許多頻段可提供5GHz以上的頻寬來實現2~4Gbps的高速通訊。本論文即針對60GHz以及70GHz頻段，設計帶通濾波器。 論文中使用基板合成波導共振腔結構，在低溫共燒陶瓷以及氧化鋁基版上製作了數種分別操作在58~62GHz、71~76GHz兩個頻段的耦合共振帶通濾波器。並在共振腔中加入並聯的共平面波導傳輸線，使之產生了傳輸零點。濾波器最低的輸入損耗都能小於2.8 dB，最大的反射損耗除了加入零點的濾波器外，其他都能高於15 dB。由於共振腔的高階模，以基板合成波導來製作濾波器會有第二通帶出現。

There are many allocated frequency band can provide a bandwidth of more than 5 GHz to realize high speed communication up to 2Ghps to 4Ghps. This thesis presents the design of bandpass filters on 60GHz-band and 70GHz-band. In this thesis, we design several coupling resonant bandpass filters for 60GHz-band and 70GHz-band by the substrate integrated waveguide (SIW) cavity structure on the LTCC and alumina substrate. And then we add shunt CPW lines to introduce a transmission zero. The lowest insertion loss of these filters is less than 2.8 dB, and the return loss is higher than 15 dB except the filter with transmission zero. There will be a second passband due to the high order mode of the cavity if we design filters by the substrate integrated waveguide cavity structure.