Feature Articles

  1. Boron-Doped CVD Diamond As An Electrically Conductive Heat Spreader In RF/Microwave Applications
    12/3/2018

    Viewed over a wide spectrum of frequencies, BDD shows promise across a range of electronics, from solid state RF PAs and advanced application specific integrated circuits (ASICs), to 5G wireless and phased array radar.

  2. Leveraging The Precision Of Ion Beam Milling Vs. Chemical Etching Of Thin Film Circuits
    11/29/2018

    This paper describes experiments conducted by SemiGen that examined the degree of variation in performance of an RF filter circuit design optimized for 12 GHz and 24 GHz. Each were produced via the two processes. It will also provide microwave/millimeter-wave circuit, component, and subsystem engineers a baseline for committing to an intended thin film process, and details the key advantages of uniformity and repeatability of ion beam milling, particularly at higher frequencies.

  3. Sumitomo Electric Designs Compact GaN HEMT Doherty Amplifier Using NI AWR Software
    11/28/2018

    Next-generation 4G/5G telecommunication systems require power amplifiers (PAs) to operate with high efficiency over a wide frequency range in order to provide multiband and multi-standard concurrent operation. Therefore, it is important to provide high efficiency at maximum output power and at lower power levels over a wide frequency bandwidth. 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.

  4. Using Removable EBG-Based Common Mode Filters For PCIe-Oriented High-Speed Buses
    11/27/2018

    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.

  5. EMI Filtering For High-Reliability Applications
    11/21/2018

    Electromagnetic interference (EMI), or electrical noise, is generated by everything from cellphones to solar flares and can make accurate signal transmission as difficult as trying to have a clear conversation in a noisy room. To improve signal clarity in electronic circuits, device designers turn to EMI suppression filters.

  6. Selecting Microstrip Filters To Deliver Small Size At High Frequencies
    11/19/2018

    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.

  7. Generate Moving Emitters In The Lab Without Expensive Field Tests
    11/16/2018

    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.

  8. Role Call: Senior Field Application Engineer
    11/12/2018

    Role Call, a series on RF Globalnet, takes a “peek behind the curtain” to help answer the questions related to different jobs and career paths in the RF and microwave industry. Recently, Kenny Lee, Senior Field Application Engineer at LitePoint, took time to answer some questions about his occupation.

  9. 5 Simple Steps For Truly Effective Design Reviews
    11/8/2018

    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.

  10. Benefits Of Time-Domain Electromagnetic Simulation For Automotive Radar
    11/6/2018

    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.