Slotline Short and Open Circuit Analysis by the Finite-Difference Time-Domain Method

Short and open slotline circuit structures are important elements for mm-wave MMIC circuit designs. Reports on their characteristics are few, and are limited mainly to experimental investigation. In this paper, slotline short and open end effects are analyzed for the first time by the Finite-Difference Time-Domain method with modified dispersive boundary conditions. A numerical deembedding method is used which improves computation precision. Numerical results are presented and compared with experimental data, evanescent mode and metal wall packaging effects are discussed.