FD-TD method offer, in principle, promise of great flexibility for application to waveguide discontinuities of any kind. The problem of appropriate termination in the guide environment has recently been addressed. Main remaining disadvantages are the volume of computation involved, lack of analytical insight and inability, so far, to produce wideband equivalent circuits, which are prerequisites to effective CAD and synthesis. With a view of remedying these shortcomings, we discuss the extraction from the FD-TD analysis of wideband equivalent circuits. Two significant examples are considered: the inductive post and the 90° H-plane corner, including a modified form of the same. The circuits thus obtained are subsequently employed in the CAD problem of matching over the full waveguide band the modified corner by means of two inductive screws. Theoretical and experimental results are in excellent agreement yielding a reflection <-12 dB over the band and showing the effectiveness of the approach.
Wideband circuit modelling of waveguide discontinuities by FD-TD methods / Moglie, Franco; Rozzi, Tullio; P., Marcozzi; M., Politi. - 2:(1993), pp. 967-970. (Intervento presentato al convegno IEEE MTT-S International Microwave Symposium tenutosi a Atlanta, GA, USA nel 14 June 1993 through 18 June 1993) [10.1109/MWSYM.1993.276905].
Wideband circuit modelling of waveguide discontinuities by FD-TD methods
MOGLIE, FRANCO;ROZZI, TULLIO;
1993-01-01
Abstract
FD-TD method offer, in principle, promise of great flexibility for application to waveguide discontinuities of any kind. The problem of appropriate termination in the guide environment has recently been addressed. Main remaining disadvantages are the volume of computation involved, lack of analytical insight and inability, so far, to produce wideband equivalent circuits, which are prerequisites to effective CAD and synthesis. With a view of remedying these shortcomings, we discuss the extraction from the FD-TD analysis of wideband equivalent circuits. Two significant examples are considered: the inductive post and the 90° H-plane corner, including a modified form of the same. The circuits thus obtained are subsequently employed in the CAD problem of matching over the full waveguide band the modified corner by means of two inductive screws. Theoretical and experimental results are in excellent agreement yielding a reflection <-12 dB over the band and showing the effectiveness of the approach.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
