Far field EM tool can model an entire car: Page 2 of 2

October 15, 2020 //By Nick Flaherty
Far field EM tool can model an entire car
The combination of a scalable EMI far field analysis tool and cloud computing is enabling pre-compliance testing of entire systems, says Cadence

“Parallelisation is key to this and the fact that Clarity is architected from the ground up to support multiple cores is really the key.”

Entire systems, up to a car, can be simulated with enough cores, says Griffin. “This is full system simulation. The analysis is at the board level and multiple enclosures, so you can model an entire car,” he said. “If you can throw 1000 cores at the problem we can give you the answer,” he said.

“With Clarity 3D, clearly the automotive industry is one area that’s highlighted, we’ve been working on ECU designs, there’s a lot of energy emitted and building multiple prototypes is very expensive,” said Griffin.

One of the first users has a focus on automotive electronic control units (ECUs), although the tool is expected to be available generally in the first quarter of 2021.

“The Clarity 3D Transient Solver allows us to simulate with test-measurement accuracy so we can predict what will be measured during EMI testing, thereby ensuring our customers pass EMI compliance checking on the first pass while dramatically reducing the number of prototype designs,” said Satoshi Utsumi, CEO of Ultimate Technologies. “This allows us to shave up to three months off automotive ECU design cycles, reducing design cycle time by as much as 30 percent.”

This far field analysis also helps accelerate design cycles for consumer and healthcare equipment. “If you have to build a prototype and take it to a chamber the design cycle is limited but if you can simulate you have more time to build a product that’s cost effective,” said Griffin.

“The healthcare industry has realised that EMI is a tremendous challenge with very strict compliance standards and a tool like the transient solver will help companies building products that they can ensure that those standards are being met,” he added.

The Clarity far field solver can also be used with the Sigrity signal analysis technology that is highly integrated with Allegro for PCBs and Virtuoso tools to avoid EM problems during the design process.

“These use other techniques to reduce the problems that can come with a PCB before we get to the 3D analysis,” said Griffin. “Sigrity Aurora works on Allegro and provides in design analysis and gives feedback on creating conditions that cause EMI, such as a high speed trace too close to the edge of a board or over a split in a ground plane.”

“We really believe Sigrity helps in design and the sign off with Clarity should keep it to one or two iterations to get to the EMC tests in the chamber to make sure you pass the emissions tests,” he said.  


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