White Papers

Understanding the Basics of MIMO Communication Technology

This paper from Southwest Antennas explores the basics of MIMO (multiple-in, multiple-out) communication technology, specifically focusing on the current generation of portable, tactical MIMO radios and the antenna technology that help make MIMO an attractive choice for today’s mobile wireless networks.

Learn How Easy MMIC Biasing Can Be

Leveraging single positive bias E-pHEMT MMICs for microwave signal chains has SWaP-C benefits over legacy dual bias D-pHEMT technology. Beyond eliminating bias sequencing circuitry, new PAs and LNAs powered by E-pHEMT even offer higher gain and linearity. Get the extra headroom you need by downloading this tech brief today.

Comparing Phase Noise Test Systems Sensitivity and Accuracy

Legacy and traditional phase noise test equipment are large, heavy, complex, fragile, and expensive. This paper illustrates measurement sensitivity equivalency to the most common system in the market with advantages in being smaller, lighter, more reliable & capable, at a fraction of the cost.

Implementing a Flexible Testbed for 5G Waveform Generation and Analysis

Explore 5G cellular system waveforms, algorithms and techniques with Keysight’s 5G testbed hardware and software elements providing the flexibility needed to address the inherent challenges of signal generation and analysis.

Numerical Methods in FEKO

Altair’s FEKO offers a wide spectrum of numerical methods and hybridizations, each suitable to a specific range of applications. Hybridization of numerical methods allows large and complex electromagnetic problems to be solved, thereby allowing solutions to problems that would be intractable with any individual method. This technical paper provides an overview of the methods.

Simulation of Beamforming by Massive MIMO Antennas in Dense Urban Environments

This paper presents a new predictive capability for simulating massive MIMO antennas and beamforming in dense urban propagation environments.  Wireless InSite's MIMO capability is used to show predictions for SINR at specific device locations and the actual physical beams, including unintentional distortions caused by pilot contamination.

Spectrum Analysis Basics

Engineering is all about connecting ideas and solving problems, and every tool you master enhances your ability to contribute. Explore Keysight Signal Analysis Basics and build a stronger foundation that will help you deliver your next breakthrough.

Using Enhanced Load-Pull Measurements for the Design of Base Station Power Amplifiers

Load-pull simulation is a very simple yet powerful concept in which the load or source impedance presented to an active device is swept and its performance is measured. Performance contours are then plotted on a Smith chart, which shows the designer how changing impedances impact the device’s performance.

PCB Substrates: Matching your design to the right material and rapid prototyping process

To stay ahead of the competition RF/Microwave, wireless, IoT, and other microelectronics, engineers and manufacturing teams must continuously evaluate the best new methods to produce efficient circuits. While the list of potential substrate materials is long, we’ll be focusing on a handful of top choices, each popular for different reasons.

FEKO for Rotorcraft Electromagnetics

The comprehensive 3D electromagnetic simulation software from Altair, FEKO, is well-suited for rotorcraft electromagnetic applications including antenna placement, rotor blade modulation, co-site interference, electromagnetic interference (EMI), electromagnetic compatibility (EMC) and radar cross section (RCS).  This paper addresses the suitability of these solvers in FEKO for the rotorcraft electromagnetic applications, also showing examples.
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