Feature Articles

  1. Sumitomo Electric Designs Compact GaN HEMT Doherty Amplifier Using NI AWR Software

    Sumitomo designers were tasked with developing an innovative high-power, wideband Doherty amplifier covering nearly 1 GHz of operation bandwidth at 2.25 GHz. This case study presents the use of NI AWR software in the design of this amplifier.

  2. Using Removable EBG-Based Common Mode Filters For PCIe-Oriented High-Speed Buses

    Common Mode (CM) filters for high-speed digital signals have been implemented in exploiting electromagnetic bandgap (EBG) structures. One of the challenges in this field involves the miniaturization of EBG-based CM filters for their application to high-speed/high-density communication buses, such as the PCI Express (PCIe) architecture. This white paper presents the design workflow of a removeable EBG-based CM filter component (R-EBG) which would be suitable for a PCIe bus through the use of the CST Studio Suite® and ADS® circuit simulations.

  3. Selecting Microstrip Filters To Deliver Small Size At High Frequencies

    When selecting a filter implementation one factor that is common across all frequencies is optimizing the size of the filter given the application and the required performance. This article discusses the benefits for selecting microstrip filters to deliver higher frequencies in mmWave applications at smaller component sizes.

  4. Generate Moving Emitters In The Lab Without Expensive Field Tests

    The R&S®Pulse Sequencer software offers an easy way to simulate moving radar emitters and a moving receiver for EW receiver tests. The software together with the R&S®SMW200A vector signal generator is a powerful radar simulator. This white paper demonstrates how the software enables engineers to generate highly dynamic 3D scenarios in the lab.

  5. 5 Simple Steps For Truly Effective Design Reviews

    As electronics and RF systems have become increasingly complex, the need to catch and fix errors during the design phase of a project has become increasingly important. Catching an error during the design phase is orders of magnitude less expensive to fix than catching it during the manufacturing or test phases. This article offers five simple steps for ensuring the most productive design review possible in each project.

  6. Benefits Of Time-Domain Electromagnetic Simulation For Automotive Radar

    The requirements for automotive radar sensors in common ranges - such as 24 GHz and 77 GHz - are becoming more stringent and engineers need to understand how design decisions affect performance.  

  7. Taking the IoT’s Electromagnetic Pulse

    The IoT Gold Rush—the move to integrate wireless transmission, circuitry and sensors into everyday household items and consumer goods to make them more appealing—is expected to increase the demand for EMC simulation. This article discusses the history of the move towards IoT technology and how simulation improves EMC in the IoT devices.

  8. Why is EMC Simulation Taking Off?

    This article discusses the importance of electromagnetic compatibility (EMC) in a variety of industries, including automotive, aerospace, defense, communications, railway, consumer electronics, energy, and healthcare. The challenge occurs when more and more electronic devices and circuits need to be fit into smaller areas while still maintaining EMC.

  9. Understanding Low Noise Spread-Spectrum Crystal Oscillators

    In the past, shielding and filtering were the most prevalent method used to control EMI. This method, however, can get very expensive and can be ineffective at times. The present trend is to control EMI at the source, using a single clock oscillator with spread-spectrum technology. This white paper discusses the theory of using low noise spread-spectrum crystal oscillator technology, and how it can be used to better control EMI in new technologies.

  10. Cobot, The Collaborative Robot – Get Ready For Industry 4.0

    Altair’s new cobot – a complex machine interacting with a human operator – is an example of a new successful design method with the use of simulation tools in industry 4.0. When creating complex products such as this, engineers must consider the entire mechatronics system, including structure, sensors, actuators with dynamic controls, electromagnetic compatibility. They must also interconnect machines for more flexibility, and increase productivity optimizing the maintenance process. This article discusses the design process for a cobot virtual demonstrator and how Altair’s HyperWorks was used in the process.