Using CST MWS for Signal Integrity problems
In recent years the modern electronic systems are moving towards higher complexity circuits with faster signal transmission rate and operating frequency. Signal Integrity problems are a very important for design engineers and, due to stringent market requirements, full wave simulation is required.
The S-parameters of two complex multilayer PCB (Fig.1 and Fig.3) are measured by means of a network analyzer and the results are compared with those from CST MWS.
Figure 1: Top/bottom 50mm microstrips in 4 layer PCB
Figure 2: Comparison between measured and simulated S-parameters results
Figure 3: 500mm long stripline in a multilayer PCB
Figure 4: Comparison between measured and simulated S-parameters results
As shown in Figures 2 and 4, the CST MWS results are in good agreement with measurements. Futhermore, an equivalent electromagnetic model of the Surface Mounted Adapter (SMA) is also developed and incorporated in the structure of the simulated board in order to evaluate the effect of the introduced discontinuities.
The surface current is evaluated by means of CST MWS and a 3D plot is illustrated in Fig.5
Figure 5: 3D Surface current plot on SMA connectors
CST Article "Using CST MWS for Signal Integrity problems"
last modified 12. Jan 2006 5:02
printed 15. May 2008 6:10, Article ID 224
URL:
All rights reserved.
Without prior written permission of CST, no part of this publication may be
reproduced by any method, be stored or transferred into an electronic data processing system, neither mechanical or by any other method.
Article ID: 224
Last modified: 12. Jan 2006 5:02
Other Articles
The dual mode filter was developed, measured, and simulated by ESA (European Space Agency).
Read full article..
The CST EM STUDIO™ Thermal Solver has been applied to simulate the temperature distribution of a dual-mode filter. The current density distribution inside the lossy conductive metals is precomputed by CST MICROWAVE STUDIO® acting as the thermal source.
Read full article..
CST MICROWAVE STUDIO® and Agilent ADS have been successfully employed in this OEIC driver design - an example of a high speed analog/broadband IC application.The package model was imported from Agilent momentum and the model was simulated upto a 100 GHz in CST MWS.The resulting eye diagrams of the driver design from CST MWS are compared with those from Agilent momentum and other test cases.
Read full article..
This article demonstrates a strong feature of CST STUDIO SUITE™: Co-Simulation of a hybrid mixer with CST MICROWAVE STUDIO® (CST MWS) and CST DESIGN STUDIO™ (CST DS).
A full 3D model is simulated and matched to a network using the in-built circuit simulator. Measured results compare well to the simulated results.
Read full article..
The shielding effectiveness (SE) of an enclosure has been simulated by using the CST MICROWAVE STUDIO® (CST MWS) and then compared to measurement from a known reference case.
Read full article..