[Editor's Note] Due to the influence of software-defined cars and electric vehicles, the installation of electronic products in vehicles is expanding, and the explosion of communication data and the complexity of in-vehicle architecture are increasing, which is increasing noise in vehicles. As a countermeasure for this increase in noise, physical circuit shielding and EMI blocking at the circuit design stage are being requested. In addition, noise prevention using filters is also known to be effective. Meanwhile, Murata Electronics Korea will present on 'Next-generation vehicle control system interface: Noise countermeasures for Ethernet, CAN FD, and PoC' through the e4ds ee webinar. Through this webinar, it is expected to understand various noise problems that can occur in vehicle control systems and gain insight into the characteristics of each protocol, the causes of noise generation, and effective management methods. Accordingly, our magazine met with Oh-Hyun Kwon, Vice President of Murata Electronics Korea, who will be presenting at the webinar, and heard about the vehicle control system interface, causes of noise in the vehicle, and solutions.


■ Please introduce Murata Electronics Korea.

Murata Electronics Korea is the Korean branch of Murata Manufacturing, a global company established in 1944. It is a world leader in the field of electronic components manufacturing, producing core components such as ceramic capacitors, inductors, and sensors used in various electronic devices and systems.

Murata Electronics Korea is responsible for selling products tailored to the Korean market based on Murata Manufacturing's technological prowess and expertise, and is focusing in particular on the development and supply of high-performance electronic components applied in cutting-edge industries such as automobiles, smartphones, and wearable devices.

■ I wonder where the main cause of the various problems that arise as communication between devices increases lies.

Problems with in-vehicle communications can arise from a number of factors.

A major cause is electromagnetic interference (EMI) generated from various electronic components, which can distort or lose communication signals.

Additionally, as devices using different communication protocols work together, communication errors may occur due to differences in data transmission methods, speed error detection methods, etc.

A vehicle's metal structure can reflect or absorb electromagnetic waves, distorting communication signals, and densely packed electronic components can cause electromagnetic interference.

■ Characteristics of the main communication protocols in the vehicle and the main causes and countermeasures for noise generation I want to know about

This webinar will cover the unique features of the major in-vehicle communication protocols: Ethernet, CAN FD, and PoC.

Ethernet provides high data transmission speeds and the ability to process large amounts of data, making it widely used in infotainment systems and autonomous vehicles.

CAN FD overcomes the limitations of the existing CAN protocol and supports larger data frames, enabling real-time data transmission.

Lastly, PoC is an abbreviation for Power over Coaxial and is a circuit structure mainly used in SerDes communication. It can be said to be an efficient circuit structure in asymmetric data communication.

Therefore, it is mainly applied to camera-related applications.

These communication protocols can be affected by various noises such as radio interference, signal reflections, and power noise.

Internal electromagnetic interference may degrade data transmission quality, and external factors may cause signal distortion.

In this webinar, we will propose a common mode choke coil to manage this noise.

This item can effectively reduce electromagnetic interference, especially common mode noise, and contribute to improving signal quality.

And CAN SiC and Bias T Inductor are also solutions that play an important role in improving the stability and reliability of in-vehicle communication systems.

Please check the webinar for more details.

■ I want to hear about noise reduction and countermeasures in future battlefield environments.

The introduction of SDVs has led to an increase in in-vehicle applications.This leads to an explosion of communication data, which in turn complicates the vehicle's E/E architecture and makes the zoning trend more evident.

The growth of applications increases the demand for communications, and the increase in data leads to an increase in high-speed/high-frequency communications, which increases the possibility of noise generation.

To solve this problem, the noise impact between each application must be mutually compensated, and structurally, shielded mechanisms are needed to prevent coupling.

The circuit must be designed so that no noise is generated, and the influence of the IC, which is the main source of noise, must be minimized.

■ If Murata has any EMI/EMC related solutions, please introduce them.

Murata has a diverse lineup of EMI filters based on its extensive experience in the electronic components field.

There are bead items from the ferrite series, CMCC, which we will focus on in the webinar, and LC filter items.

We also have MLCC, RF Inductor, and Power Inductor lineups, and can provide circuit solutions through these items.

Furthermore, we also perform actual EMC tests and propose practical circuit and structural countermeasures for the noise generated.

■ Please introduce the e4ds webinar that will be held on December 19th.

This webinar will focus on noise issues in representative communication protocols such as Etherner, CAN FD, and PoC under the theme of next-generation vehicle control system interfaces.

Noise generated by various electronic devices installed in modern vehicles directly affects the stability and performance of the vehicle. />
In this webinar, we will deeply analyze the characteristics of each protocol and the causes of noise generation, and suggest effective noise management methods to contribute to improving the reliability of vehicle electrical systems.

It will be a great opportunity to increase understanding and strengthen expertise in vehicle control systems, a key technology that will lead the future of the automobile industry.

We ask for your interest and participation.