Simberian Inc.

Ever wondered why vias are the weakest link in PCB interconnects? Designing vias for PCB and packaging interconnects is a notorious challenge, especially for 112-224Gb signals, as they often cause signal integrity failures due to reflections and crosstalk. After reviewing around 200 papers, we found no reliable methodology. Most solutions rely on brute force optimization in a 3D EM solver, resulting in uncertain outcomes and impractical tricks that are not suitable for mass production. This is where we started over a year ago, only to realize it leads to a dead-end. Can we design vias more efficiently? Can we avoid redesigning vias for each manufacturer? We will address these questions and more in our upcoming paper and presentation at DesignCon 2025. Here's a hint: treating vias as part of the waveguiding structure and designing them as waveguides simplifies the process and opens the path to 448Gb links! Don't miss this opportunity to discover a revolutionary approach to via design. https://lnkd.in/gYNpsu9M See you at DesignCon 2025! #simbeor #electromagnetics #signal_integrity #designcon

Is crosstalk the most common cause of PCB/packaging interconnect failures? Not quite — reflections take the top spot. But crosstalk is a close second and arguably the most challenging to evaluate and eliminate. Join my tutorial at DesignCon 2025 to demystify this elusive phenomenon. We'll dive deep into the science of crosstalk analysis, leaving no room for guesswork or black magic. Understand it, analyze it, and master the techniques to mitigate it. Don't miss out on this opportunity to elevate your signal integrity skills and ensure reliable, high-performance designs. See you at DesignCon 2025! https://lnkd.in/gcUPScRi #simbeor #electromagnetics #signal_integrity #designcon

Material Model Identification for PCB and Packaging Interconnects... Simbeor software offers unique feature for dielectric and conductor roughness model identification using GMS-parameters method described in this paper from EPEPS 2015. Unlike the Delta-L or Eigenvalue method (IPC-TM-650 Method 2.5.5.14), GMS-parameters method uses a field solver in the identification process.  To support material model identification, Simbeor has three field solvers for extracting transmission line parameters: • Simbeor SFS: A Method of Moments (MoM) 2D quasi-static field solver for digital PCB interconnects. • Simbeor 3DML: A Method of Lines (MoL) 3D electromagnetic field solver for microwave PCB interconnects, suitable for wider traces with high-frequency dispersion. • Simbeor 3DTF: A Trefftz Finite Element (TFE) 3D electromagnetic field solver for micron-size interconnects (Packaging, Interposers), transitioning to a well-developed skin effect around the Nyquist frequency. The same identification process is used with any of these solvers and can be further automated with Simbeor SDK. The SDK supports multiple methods for the automatic separation of dielectric and conductor losses. Simbeor supports of 11 broadband dielectric models, 7 broadband conductor roughness models and 4 dispersive models for conductors - sufficient for any type of interconnects.  Read more at  https://lnkd.in/gWCQTREz  https://lnkd.in/ghJpnmfH Or download Simbeor from www.simberian.com and identify material models for your application. #simbeor #electromagnetics #signal_integrity

Unlock the full potential of your AI and ML projects with Simbeor SDK! Simbeor SDK is the industry-first signal integrity analysis automation kit https://lnkd.in/g-uZ4yDg Here are just some reasons to use Simbeor SDK for AI and ML: + Unique, fast, and accurate decompositional electromagnetic analysis of interconnects with multiple solvers + Universal API for C/C++, MATLAB, and Python + Tested in multiple ML projects + Easy to use with multiple example kits to start with + Scalable and cost-effective Ready to elevate your AI and ML projects? Learn more about Simbeor SDK today! https://lnkd.in/gRe3jwta  #simbeor #electromagnetics #signal_integrity #AI

Fiber-Wave Effect on PCB Interconnects - Mitigate or Evaluate the Impact on Signal? PCB laminates made of woven glass fabric embedded in resin can cause signal integrity issues such as skew, mode conversion, jitter, and even resonances. Mitigating these effects increases costs and may complicate the layout. Evaluating the impact requires a model, ideally not a 3DEM 😎 This paper from EMC 2014 focuses on building a causal, fast, and accurate macro-model to predict the effect of dielectric inhomogeneity in laminates on signal propagation. A field solver is used to model a non-uniform transmission line with varying dielectric filling across the cross-section and along the line. The paper suggests two causal models for changing dielectric constant and loss tangent to capture the physics of the mixtures while maintaining causality. The Fiber-Wave Effect (FWE) was experimentally discovered by teams from Teraspeed and Intel about 20 years ago when data rates approached 10 Gbps (see references in the paper). Since then, numerous publications have addressed both mitigation and modeling of this effect. Though, the model proposed in this paper is still exclusively available only in Simbeor software. The model parameters (imbalance and modulation) require knowledge of the laminate structure geometry and the dielectric properties of glass and resin. Effective permittivity distribution can be evaluated with FWE Kit from Simbeor SDK (3D EM is required after all) with data available from laminate manufacturers and turned into probable imbalance and modulation factors. Ready to give it a try? #simbeor #electromagnetics #signal_integrity #fiber_weave_effect

Explore S-parameter Models with Simbeor... S-parameters are the foundation of modern signal integrity. Even when evaluating interconnect compliance in the time domain, S-parameters play a crucial role. But how do you ensure the quality of your simulated or measured S-parameters for accurate analysis? It can be easily done with Simbeor Touchstone Analyzer as demonstrated in this video. Simbeor Touchstone Analyzer was introduced as the industry's first S-parameter quality assurance and macro-modeling tool back in 2010! The passivity, reciprocity, and causality quality metrics introduced in Simbeor were later standardized by the IEEE P370 committee. But unique final quality metric, based on rational approximation, remains exclusive to Simbeor. In addition to final quality evaluation, the rational macro-modeling in Simbeor enables fast and consistent time and frequency domain analysis in Simbeor Compliance Analyzer, as demonstrated in this short video as well. Ready to explore the quality of your measured or simulated S-parameter models? Download Simbeor from www.simberian.com and give it a try! 😎 YouTube https://lnkd.in/g86jAUfZ #simbeor #electromagnetics #signal_integrity

Are You Sinking or Swimming at 28 Gbps? 😎 How confident are you that your PCB interconnect models match real-world measurements? This was the focus of the "Sink or Swim" paper from the October 2014 issue of PCB Design Magazine (https://lnkd.in/gvEJjeP8). Although it was published nearly a decade ago, its insights remain crucial! Only through your own validation can you uncover potential issues in your design process. To establish confidence boundaries for your design process, follow this 3-step approach: 1. Measure S-parameters with a VNA and qualify them using formal quality metrics (Simbeor can assist with this). 2. Identify or confirm broadband dielectric and conductor roughness models (Simbeor offers unique capabilities here as well). 3. Simulate all test structures with the identified material models and verified board design adjustments, then compare with the measured data in both frequency and time domains (using Simbeor or any EM SI software). Avoid tuning geometry and material models to fit the measured data. This process is illustrated in the paper using the CMP-28/32 Validation Platform from Wild River Technology. You can either use newer versions of this platform or build your own (though it may be time-consuming). Since then, both Simbeor software and the "sink or swim" process have evolved significantly. While 28 Gbps remains challenging, it's no longer the cutting edge. Today, we must predict interconnect behavior at 112-224 Gbps. Is it even possible? #simbeor #electromagnetics #signal_integrity

Simbeor SI Compliance Analyzer: Where Time and Frequency Domains Converge! Watch this demo video to see how Simbeor makes PCB interconnect compliance analysis a breeze. Whether you’re a frequency-domain guru or a time-domain wizard, Simbeor’s got your back! Some engineers prefer VNAs and think in the frequency domain, while others use TDR or BERT scopes and think in the time domain. Both domains are useful and, in fact, required for signal integrity compliance analysis. Simbeor seamlessly bridges the two domains. It is the only tool where models of discontinuities and complete links are built in both time and frequency domains using adaptive frequency sweeps with simultaneous rational approximation. The results are the frequency-continuous rational models that are directly used for the time-domain analysis (no DFFT, no dependence on sampling). Enjoy the same two-domain ease in pre-layout and enhanced post-layout or multi-board analysis with Simbeor SI Compliance Analyzer with 26 compliance measurements! Importing this Big Sur PCB from the Open Compute project takes less than a minute. Selecting links is just a few clicks, and 3D EM analysis with crosstalk for a 16 Gbps signal with 30 GHz bandwidth takes about 25 minutes. Optionally setting the receiver and transmitter sides also takes a couple of clicks. All ports required for the analysis of links and discontinuities are automatically defined. Download Simbeor, get a fully functional trial license, and start working and thinking in both domains! Youtube version https://lnkd.in/g34E7wHs #simbeor #electromagnetics #signal_integrity