摘 要 本論文主要是提出一個共平面波導到共平面帶狀線的寬頻轉接，以寬邊耦合帶狀線的設計方式取代微帶扇形殘段達到降低整體轉接電路的面積，在此是將此轉接分為兩個轉接電路，分別是共平面波導到微帶線的轉接與微帶線到共平面帶狀線的轉接，以IE3D電磁模擬軟體分別對這兩個電路模擬並且以背對背的方式實現並量測，得知兩者在模擬與量測結果都有很好的一致性，再將這兩個電路合併為由共平面波導到共平面帶狀線的轉接，得知其模擬與量測結果也都有很好的一致性，在量測頻寬從6.5GHz到13.5GHz時，插入損耗為1dB，返回損耗為15dB，當頻率在x-band(8GHz~12GHz)時，返回損耗為20dB左右。除了共平面波導到共平面帶狀線的寬頻轉接之外，也以IE3D軟體針對傳統對T-型接合線的補償方式探討，得知當頻率從25GHz~35GHz時，這些補償方式都不適用。 Abstract This thesis mainly presents a broadband CPW-to-CPS transition using broadside-coupled strips, instead of microstrip radial stub, to reduce the overall area of transition. The transition is composed of CPW-MS and MS-CPS transition. Using IE3D electromagnetic simulation software to simulate CPW-MS and MS-CPS transition and to realize in back-to-back configuration. In CPW-MS and MS-CPS transition, both simulation and measurement are in good agreement. Hence, to merge the two transition and it found that both simulation and measurement are in good agreement in back-to-back configuration. Overall, the 1-dB insertion loss and 15-dB return loss bandwidth for the back-to-back transitions is from 6.5 GHz to 13.5 GHz. The back-to-back transitions also have a 20-dB return loss bandwidth from 8 GHz to 12 GHz. Besides CPW-to-CPS transition, this thesis also uses IE3D software to simulate conventional compensation of T-junction. It found the design of conventional compensation of T-junction are not suitable, when frequency is from 25 GHz to 35GHz.