Calculation of frequency characteristics for stripline right-angle bend with slant-wise corner cut －based on 3-stage connection and calculation of eigenmode by magnetic wall symmetry－

ストリップ線角斜め切断直角曲がりの周波数特性をのフォスタ型等価回路に基づいて解析するために、接合回路部(角斜め切断正方形平面回路)の固有モードを高次まで正確に求める必要がある。ここではストリップ線3段縦続回路の磁気壁対称性を利用して固有モードを求め、その結果から、直角曲がり回路のフォスタ型等価回路定数(共振周波数、平面導波路部と平面接合部との結合度)を計算し、広帯域周波数特性を求めた。さらに、各切断量に対する透過特性を計算することで、最も透過量の多い最適切断率について検討を行った。Stripline right-angle bend with slantwise corner cut is an important component for microwave circuit. Especially, analytical determination of the exact optimum cut is important for computer aided design of microwave circuit. Equivalent network for this structure is given by Foster-type network based on mode theory and can be used for analysis of practical bend characteristics. The key step for this analysis is how exactly to calculate eigenmode of the planar junction up to necessary number. Therefore, we propose a new method using three stage cascade-connected stripline configuration and magnetic wall symmetry. In this paper, we explain the above method in detail and calculate the eigenmode for various cut parameters. Finally, frequency characteristics of the right-angle bend with slantwise corner cut are calculated for various cut parameters, resulted in the determination of the optimum cut.MW2001-51 rights: 社団法人電子情報通信学会 relation: isVersionOf:http://ci.nii.ac.jp/naid/11000319033