Feature Articles

  1. Introduction Into Theory Of Direction Finding

    While direction finding for navigation purposes is becoming less important, there is a growing demand for determining the location of emitters as the mobility of communications equipment increases. The importance of direction finding lies in the fact that spread-spectrum techniques are increasingly used for wireless communications. This means that the spectral components can only be allocated to a specific emitter if the direction is known. Direction finding is therefore an indispensable first step in radio-detection, particularly since reading the contents of such emissions is usually impossible.

  2. Functionality Testing Of Automotive Infotainment Devices

    Modern day vehicle interactivity takes place on the centrally placed touchscreen head unit display (HUD) on the car dashboard and their infotainment systems have become a central hub for a wide range of vehicular functionality. These systems provide driver entertainment and information by integrating different functions. Examples include in-vehicle connectivity with wireless devices and connecting with external communications, transmission, radio and satellite network providers. This article discusses the challenges of functionality testing in automotive infotainment devices and presents a test and measurement solution.

  3. The Wi-Fi Evolution

    Since Wi-Fi was first released to consumers in 1997, its standards have been continually evolving – typically resulting in faster speeds and network/spectrum efficiency – and it can be difficult to keep track of new standards. This paper is meant to help you understand the basics of Wi-Fi standards, and provides and overview of the evolution of Wi-Fi technologies.

  4. Resolving Interference In A Crowded Wi-Fi Environment Using BAW Filters (Part 2)

    There are any number of strategies that consumers can try to fix interference problems with Wi-Fi in their homes, but as an RF engineer, how can you design a Wi-Fi access point that addresses the biggest interference issues from the outset? 

  5. Making 5G Work: Accelerating Testing Across The Workflow To Put 5G Devices In The Hands Of Customers

    5G represents an exponential increase in technical complexity with challenges coming from 5G new radio (NR), massive multiple input multiple output (MIMO), millimeter-wave (mmWave) frequencies, and over-the-air (OTA) test methods. Device makers must effectively overcome these challenges to reach commercialization faster than the competition. This paper includes useful tips to help manufacturers accelerate time to market across the 5G workflow and reach first-to-market status.

  6. Model-Based GaN PA Design Basics: GaN Transistor S-Parameters, Linear Stability Analysis And Resistive Stabilization

    S-parameter matching is used to maximize gain and gain flatness in simple linear RF/microwave amplifier designs. This same S-parameter data is used to develop matching networks that address amplifier stability. This paper discusses the importance of using modeling for basic S-parameter and stability analyses in the gallium nitride (GaN) power amplifier (PA) design process. It also focuses attention on a simple two-port stability analysis derived from linear S-parameter calculations. The nonlinear Qorvo GaN power transistor model from the Modelithics Qorvo GaN Library, in combination with simulation templates and Keysight Advanced Design System (ADS) software.

  7. Connectivity Q & A: Reducing Wi-Fi Interference

    Wi-Fi Tech & Trends is Qorvo's new blog series that features questions and answers from Tony Testa, Director of Wireless Connectivity Solutions. In this article, Tony will provide insight on the latest Wi-Fi design tips, trends and innovative solutions.

  8. Piletest Uses The Fischer LP360™ Connector In Pile Echo Tester To Test Pile Foundation Integrity

    Piletest uses Fischer Freedom™ in its Pile Echo Tester. Fischer Connectors first produced a prototype using Piletest’s oiled cable to test mechanical constraints, then two prototypes to test electrical constraints. Piletest’s specific requirements were twofold: their design engineers needed a solution that could easily be integrated into their device and their end users needed PET to be rugged, IP68-sealed, fully cleanable and ultra-easy to connect. As a result, Piletest chose the Fischer Freedom™ Series full connectivity solution.

  9. The Importance Of Antenna Beamwidth In RF Testing

    Antenna beamwidth determines the expected signal strength given the direction and radiation distance of an antenna. The beamwidth will vary given several different factors such as the antenna type, design, orientation and radio frequency. This white paper presents a better understanding of beamwidth and how it influences a test environment is critical to accurate and repeatable tests.

  10. Tolerance And Size Analysis For mmWave Filter Manufacturing

    A common question regularly asked to Knowles Precision Devices is “why not just integrate a filter in the board stack?” In short, there are manufacturing tolerances to consider, and size must also be considered. This white paper examines different 26 GHz filter manufacturing approaches with the specific design goals to better understand the importance of tolerance and size analysis.