梯形屏蔽共面波导及共面耦合线特性阻抗的计算

CALCULATION OF CHARACTERISTIC IMPEDANCE OF COPLANAR WAVEGUIDE, COPLANAR COUPLED LINES WITH STEP MICROSHIELD

提出了适用于ＭＭＩＣ设计的一类新型共面传输线，它包括梯形屏蔽共面波导（ＳＭＣＰＷ）、梯形屏蔽共面耦合线（ＳＭＣＣＬ）、共面耦合梯形屏蔽线（ＣＣＳＭＬ）．推导出了用于计算这些传输线的ＴＥＭ参数的解析公式．数值计算结果显示了此类共面传输线的性质．

A new type of coplanar transmission lines was presented, including step microshield coplanar waveguide (SMCPW), step microshield coplanar coupled line (SMCCL), and coplanar coupled step microshield line (CCSML), which are suitable for MMIC design. The simple, analytical and practical formula for the evaluation of the quasi TEM characteristic parameters was derived, which is based on a conformal mapping procedure. The numerical calculation results show the characteristics of these coplanas transmission lines.