Feature Articles

  1. How To Measure All Types Of Antennas Using Very-Near-Field Measurement

    In order to help avoid sending antennas that fail to meet specified design criteria, regulatory requirements, or consumer satisfaction to the marketplace, designers need to characterize the antenna to meet all of the performance criteria. 

  2. Sequential Peeling: A Model-Based Approach To Structure Identification And De-Embedding

    Sequential peeling is a model/measurement-based method of network extraction for de-embedding. This paper is about one of those model-based approaches that uses position information about structures in the fixture, and an indicated impedance/admittance model to extract parameters of that particular structure. 

  3. Top 10 Small Cell Infrastructure Questions

    While small cells offer a host of benefits, they also create new challenges for designers; namely, heat issues. Power-efficient power amplifiers offer a compelling solution to this dilemma. This Q&A sheds light on some of the key trends and challenges in today’s small cell market and uncovers the power-efficient PA’s role in overcoming these challenges.

  4. Small Cell Networks And The Evolution Of 5G: Part 1

    This article is the first part in a two-part series on the topic of small cell base stations. Part 1 covers the basics of small cells and how they fit into the evolution of 4G and 5G.

  5. Making The Right Choices When Specifying An RF Switching System

    Designing RF switching systems can be dull, so the importance of designing one is often overlooked. However, designing a proper switching system is essential to the operation of the rest of the testing system, so it is vital to make the right choices for a successful automation. 

  6. Key Test Considerations For A Quality 5G Wireless User Experience

    In part 1 of this series, we explored the variety of wireless technologies that make up 5G — a family of technologies optimized for a variety of use cases. This article will focus on the testing challenges facing these higher-bandwidth technologies.

  7. PNT: Going Beyond GPS

    As powerful as GPS technology is, it has three key problems. To overcome these problems, new positioning, navigation, and timing (PNT) systems are being developed that can enhance the effectiveness of existing GPS, and take advantage of alternatives to conventional GPS.

  8. Why USB Vector Network Analyzers (VNAs)?

    USB Vector Net Analyzers (VNAs) offer benefits such as separating the measurement module from the processing module, measurement results brought to any external PC using VNA software, and the latest OS processing power, bigger displays, and simplified maintenance of the analyzer.

  9. Mitigating Phase Noise From Vibration In Air Traffic Control And EW Radar Systems

    Phase noise can be viewed as a measure of the spectral purity of a signal, and can be produced by internal effects and external effects. Internal effects are generally in the form of impurities or non-idealities in oscillator circuits and resonators. External effects can be caused by vibration by certain components and circuits. These components and circuits are considered piezoelectric, and ironically they are usually the resonators, oscillators, and filters which most define the source signal’s frequency and spectral purity in a non-vibrational environment. For radar systems operating in very high vibration environments, the vibration-induced phase noise can be orders of magnitude greater than the static phase noise. This article helps the reader to understand the impact that the radar system’s operating environment plays in generating phase noise, and how to mitigate its effects.

  10. 5G In Perspective: A Pragmatic Guide To What’s Next

    The world’s communications and other connected technologies are evolving rapidly toward 5G in the hope of bringing about new and exciting solutions for deep learning, artificial intelligence, and “ambient awareness.”