Feature Articles

31. Facing 5G NR Test Challenges 5/13/2020

    With initial 5G trials and deployments now using the official 3GPP standard,design laboratories and conformance test facilities are facing the struggle to deliver user equipment, fixed-wireless access (FWA), and customer premise equipment (CPE) verified to meet this standard, and also to anticipate the next steps in 5G technology, the 3GPP standard, and corresponding test requirements.

32. Medical Imaging Quality Starts By Selecting The Right Components 5/13/2020

    MRI machines use a strong magnetic field and computer-generated radio waves to produce cross-sectional images. Thus, the quality of the MRI depends on the uniformity of the magnetic field and the radio components inside it.

33. The Week in 5G: 5/12/2020 — Huawei, Automakers form 5G “Ecosystem” Alliance; Australia Eyes 850 MHz and 900 MHz Bands for 5G 5/12/2020

    Plus, science deniers' crusade against 5G continues, Qualcomm touts a new processor, New Zealand forgoes an auction and assigns 5G spectrum directly, and more, all in this edition of the Week in 5G. 

34. Best Practices For Maximizing The Performance Of Our Surface-Mount Filters 5/7/2020

    The Knowles Precision Devices DLI brand of microstrip bandpass filters offers innovative filter topologies yielding excellent performance in a small footprint when fabricated on high DK temp stable ceramic substrate materials. Since customers use surface-mount filters in a wide range of applications, they have designed their devices so they can be used on most RF PCB materials. To ensure our customers achieve optimal performance and are successful with the filters, this article compiles a number of best practices and resources.

35. FAQ: What Is Q Factor? 5/7/2020

    The quality factor (Q) of a resonator is expressed as the ratio of stored versus lost energy per oscillation cycle. Overall losses through a resonator increase as Q factor drops and will increase more rapidly with frequency for lower values of resonator Q.

36. Supporting Medical Advancement At Knowles Precision Devices 5/7/2020

    Knowles Precision Devices (KPD) handles the specialty components that go in the systems that can’t quit. One area of expertise is high-reliability capacitors for medical devices and medical implantable devices.

37. FAQ: Does MLCC Capacitance Change With Voltage? 5/7/2020

    Voltage fluctuation is known to occur in ferroelectric materials like barium titanate, which is used in most X5R and X7R capacitors. However, the amount of loss experienced can widely vary depending on the dielectric material and the type of voltage, DC or AC, used. This is problematic if not considered when designing a capacitor because the capacitor can lose more than 70 percent of its rated capacitance with applied voltage depending on the combination of material and voltage used. This article addresses this phenomenon and futher discusses MLCC capacitance change with voltage.

38. Tips From The Lab: Vertical Mount MLCC’s To Save Board Space And Achieve High Capacitance Values 5/7/2020

    StackiCap surface mount MLCCs are designed to provide high capacitance values in compact packages and offer the greatest volumetric efficiency and capacitance per unit mass of any high-voltage X7R ceramic capacitors available.

39. RF Filter Terminology And Specifications 5/7/2020

    To choose the right filter for your application, you need to evaluate filter type, identify the filter technology that best suits your application, and ensure the filter meets your required specifications. This article dicusses terms commonly used to discuss filter type, technology, and specifications.

40. What To Think About When Replacing Film Capacitors With MLCCs 5/7/2020

    Multi-layer ceramic capacitors (MLCCs) are emerging as an excellent alternative to film capacitors. This article reviews some of the considerations to keep in mind when you are deciding if making the switch is the right choice for your application.