High-frequency crosstalk between two parallel slotlines

A study of high-frequency crosstalk between two slotlines located in parallel on the same substrate is presented. The electric field is induced in a passive slotline because of coupling from the other closely placed slotline excited by a source. A full-wave analysis, the method of moments in the spectral domain, taking into account both the bound and the residual and leaky modes, is used to examine high-frequency crosstalk. As a result, the voltage of the total wave propagating along the coupled lines is calculated. The theory is verified by measurement and by a simulation performed in CST Microwave Studio.