Featured White Papers

AnalogbDevices

Hybrid Beamforming Transmit Calibration with SFDR Optimization

Phased array calibration efforts are generally focused on optimizing the fundamental signal of interest. This article presents a method to further improve spurious performance once the phase calibration for the desired signal is known. Using this method, we will evaluate transmit spurious signals on a 32-element hybrid beamforming system comprised of four 8-element subarrays. 
Richardson RFPD

Fixed Wireless Access for Unlicensed 60 GHz with Perspectus Modules

As consumer demand for data bandwidth grows worldwide, service providers face difficult and expensive challenges to expand capacity and coverage. Multi-gigabit Fixed Wireless Access systems offer a solution for overcoming many of these service-provisioning challenges.
Pickering

How to Build Successful Switching Systems for Mission-Critical Test Applications

Today’s test systems are often developed in silos – specific test systems designed for the specific products or processes needed today – without forethought toward future testing needs. However, shifts in demand require today’s products to scale in production or grow in functionality. 
Rohde and Schwarz

An Introduction to Passive Radar Systems

This whitepaper explores the innovative concept of passive radar and its many advantages. We cover its operating principles, basics of bistatic radars and the concept of EoOs. We also evaluate the role of satellite illumination and forward scattering in passive radar and highlight real-world examples of operational passive radar systems. 

Rohde and Schwarz

Application Note: The Cold Source Technique for Noise Figure Measurements

This application note describes the cold source technique as it is implemented on the R&S®ZNA vector network analyzer.
Holzworth

Measuring the Phase Noise of High-frequency, Low Phase Noise Dielectric Resonator Oscillators

Dielectric Resonator Oscillators (DROs) are compact, narrowband devices that stabilize frequency with a dielectric resonator, enabling the generation of microwave signals with extremely low phase noise. In this whitepaper, discover an advanced phase noise measurement solution that can capture DRO performance accurately and effectively.
mmTron

Disruptive MMICs for mmWave: Power | Efficiency | Linearity

The promise of mmWave spectrum for communications has been realized more slowly than hoped. Simultaneously optimizing for output power, linearity, and efficiency over wide bandwidths is more challenging than expected — limiting system capabilities such as range and data rates. This white paper discusses mmTron's approach to overcoming these challenges.
Rohde and Schwarz

High Rate Pulse Ultrawideband Physical Layer Testing and Certification

Read this white paper to get an overview of the UWB standards and international UWB consortia, technical fundamentals of UWB technology and the high rate pulse (HRP) UWB physical (PHY) layer based on the IEEE 802.15.4 standard as well as the IEEE 802.15.4z standard.
pSemi

SOI-RF Enabling mMIMO Active Antenna Radio Design for 5G Sub-6

The superior performance of active/advanced antenna systems (AAS) compared to traditional passive antenna systems (PAS) is driving a transition towards AAS for telecommunications base stations. These AAS are composed of several to even hundreds of antenna elements that, depending on the design, require distinct RF signal chains to the antenna elements. 
Skyworks

Data Center Trends Driving The Next Wave in Timing Innovation

Learn why new technologies are being adopted to address the need for higher bandwidth in data centers to run increasingly complex tasks and applications. Learn how the use of ultra-low jitter reference clocks to provide the optimal system performance in data centers.
 
To continue supporting the rapid pace of new innovations and applications being run in the cloud, architects and hardware designers must continue to expand bandwidth within the servers, storage equipment and switching networks within data centers. The migration to 100/400GbE in data center interconnect and leaf/spine switches, PCIe Gen4/5 in servers and add-in cards, and NVME in solid state storage all exemplify new technologies being adopted to address the need for higher bandwidth. To ensure the maximum potential of these technologies is reached, system designers must put greater importance on clock tree design and use ultra-low jitter reference clocks throughout the data center.