promach
Advanced Member level 4
I am trying to replicate the microstrip low-pass filter in SonnetLite from the book by **broken link removed**
However, the S12 graph shows that it is not a low pass filter at all. Could anyone advise why ?
box resonance warning analysis logs
However, the S12 graph shows that it is not a low pass filter at all. Could anyone advise why ?
box resonance warning analysis logs
Code:
Run 1: Sat Jun 22 00:27:07 2019. SL291418.107194.
Em version 15.53-Lite (32-bit Windows) on DESKTOP-DG59KC2 local.
Project: C:\Users\kevin\Documents\sonnet\15.53-Lite\three-pole microstrip lowpass filter using open-circuited stubs\three-pole microstrip lowpass filter using open-circuited stubs.son.
Frequency: 0.001 GHZ
Sonnet Warning EG2680:
Circuit has potential box resonances.
Circuit: primary structure
The estimated box resonance frequencies are listed below.
The calculations assume lossless materials, with a box filled with
only the specified dielectric stackup materials.
4.140 GHZ TE Mode 1,0,1
4.673 GHZ TE Mode 1,0,2
Only lowest order modes considered.
See the chapter on package resonances in the Sonnet User's Guide.
Date: Sat Jun 22 00:27:07 2019
Sonnet Warning EG2680:
Circuit has potential box resonances.
Circuit: left box wall SOC magnetic wall standard
The estimated box resonance frequencies are listed below.
The calculations assume lossless materials, with a box filled with
only the specified dielectric stackup materials.
4.167 GHZ TE Mode 0,1,1
4.700 GHZ TE Mode 0,1,2
Only lowest order modes considered.
See the chapter on package resonances in the Sonnet User's Guide.
Date: Sat Jun 22 00:27:07 2019
Post-Analysis:
Errors detected: 0 Warnings detected: 2.
Analysis completed Sat Jun 22 00:27:10 2019.