Spurious radiation from a practical source on a leaky covered microstrip line

The radiated fields from the currents induced on a covered microstrip transmission line by a finite-gap voltage source are presented. The behavior of the bound-mode and continuous-spectrum fields is studied. It is determined that leaky-mode fields can contribute to cross-talk and other interference effects near the source and within an angular leakage region, while bound-mode radiation fields are the predominant mechanism for these effects further away from the gap source outside the leakage region.