Transverse impedance of Ceramic collimator Transverse impedance of Ceramic collimator. Comparison of HFSS versus GdfidL A.Grudiev 07.05.08

GdfidL setup Z Lc Setup 1: PML b.c. infinitely long setup Perfect Conductor Collimator: εr, σ 2b Setup 1: PML b.c. infinitely long setup Setup 2: Short Circuit b.c. finite length setup

Dependence on the Lc. εr=5, σ=0 Setup1: PMLBC Numerical effect Setup2: SCBC f[MHz] f[MHz]

Dependence on the mesh. Lc=1m, εr=5, σ=0 Setup1: PMLBC f[MHz] Setup2: SCBC f[MHz]

HFSS setup. Infinitely long setup b=2mm d=10mm L0 Δ/2=1mm From V. Vaccaro (1994)

Variation of σ=1 - 10-6, εr=1 , Lc=1m, d=10mm f[MHz] Very good agreement between HFSS and GdfidL

Variation of σ=1 - 106, εr=1, Lc=1m, d=10mm f[MHz] No agreement between HFSS and GdfidL for σ > 10. GdfidL mesh is too bad ?

Variation of εr=2-20, σ=0, d=10mm Imaginary part of the transverse impedance f[MHz]

Variation of d=1-20mm, σ=0, εr=5. HFSS setup f[MHz]

Variation of d=1-20mm, σ=1, εr=1. HFSS setup f[MHz] f[MHz]