Featured Articles

  1. A Review Of GaN On SiC High Electron-Mobility Power Transistors And MMICs

    This paper summarizes the unique advantages of Gallium–nitride power transistors (GaN HEMTs) compared to other power transistor technologies, with examples of where such features have been exploited.

  2. Boron-Doped CVD Diamond As An Electrically Conductive Heat Spreader In RF/Microwave Applications

    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.

  3. RF Converters Enable Efficient Multiband Radios For Next-Generation Wireless Base Stations

    To support rising wireless data demand, modern base station radios are being designed to support multiple E-UTRA bands, as well as carrier aggregation techniques. These multiband radios employ next-generation, GSPS RF ADCs and DACs that allow frequency agile, direct RF signal synthesis, and sampling techniques. To deal with the sparse nature of the RF wireless spectrum, sophisticated DSP is used to efficiently process the data bits to RF and back again. This application note describes an example of a direct RF transmitter for multiband application, considering DSP configurations and power vs. bandwidth trade-off.

  4. Leveraging The Precision Of Ion Beam Milling Vs. Chemical Etching Of Thin Film Circuits

    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.

  5. 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.

  6. Measuring Ultra Low Noise Metrological Reference

    Signal sources with very low phase noise have significantly improved in their performance over the past few years. However, it has also become increasingly difficult to measure such low phase noises with standard and even dedicated phase noise measurement systems. 

  7. 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.

  8. EMI Filtering For High-Reliability Applications

    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.

  9. 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.

  10. 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.