Predicting Chip-Package-Board Radiation EMI-EMC Early in the Design Cycle: Can Your EM Solver Do That ?
Consider the following scenario. Switching logic for large on-chip blocks leads to power transients. These transients find their way through solder bumps or bond wires through to the package, and through solder balls into the board. These cause not only IR drop, and voltage and ground bounce, but also cause radiation and electromagnetic interference. This radiation or EMI may couple back into the system, cause undesired interference to other system, cause unacceptable loss and noise, and may also cause the system to violate EMC rules such as those set by the FCC. Consider a slightly diffferent scenario, associated with signal waveforms ...
What to Ask of Your Electromagnetic Field Solver for System-Level SSN-SSO
Simultaneous switching noise (SSN) - outputs (SSO) embodies in many ways the culmination of the most difficult challenges in signal integrity (SI) and power integrity (PI) modeling. Here are some reasons why this is such a challenging problem, and one where many questions need to be asked of the electromagnetic (EM) field solvers being used to address this problem. 1. Problem definition: Some excellent resources exist on the web that describe the SSN-SSO problem, such as these public documents from Cadence, Actel, and EE Times Asia / Altera. In essence, this problem is a coupled SI-PI problem that looks at effects ...
Analyzing And Designing Integrated Antennas in Wireless Systems
Wireless systems are now ubiquitous in sensing, communication, and computing applications. These range from high-end, high-cost, high-power RF MIMO systems to low-cost analog sensors with integrated low-cost antennas. Design, analysis, and verification of such systems are challenging on a variety of fronts. These systems tend to be complex! Multiple radios may exist with interference between each of them, and with antennas playing multiple roles. These systems naturally function at high frequencies, implying that there are significant full-wave effects, multiple resonances, and strong environmental effects. Antenna patterns, near field behavior, and impedances and bandwidth are also strongly dependent on interactions with the ...
