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This eBook explores 5G and mMIMO trends, beginning with an overview of the market gathered by 5G Americas, Omida and GlobalComm. The next article provides a tutorial on O-RAN and its approach to standardizing the interfaces among the radio unit, distributed unit and centralized unit. The next article shifts the focus to private 5G networks, discussing the steps to ensure success.  An O-RAN compliant mMIMO base station was the focus of the next article; however, mMIMO is not the only type of base station used in a 5G network. Small cells are equally important, particularly for indoor settings and high data demand areas, whether indoors or outdoors. “Anatomy of the 5G Small Cell,” condensed from a Small Cell Forum report. Turning to testing, the next article discusses the challenges testing deployed 5G networks. The concluding article in the eBook addresses test challenges unique to TDD networks, stemming from the rapid switching among the subframes transporting the data. The test equipment used to evaluate these TDD systems, such as power meters, must have better performance than the radio, including fast rise time and measurement speed, wide video bandwidth and short time resolution.

For reliable and efficient system YOUR TASK verification and debug of DDR3/DDR4 memory designs, comprehensive compliance test and analysis tools are required. While measurement capability and usability are critical to speed up the verification and debug process, it is equally important to choose the right probing solution and use advanced techniques to improve overall measurement accuracy.

This eBook explores GaN applications and highlights the capabilities of the technology. The first few articles describe applications where GaN’s high power, high temperature and radiation tolerance may prove useful: LEO satellites, EW, and hypersonic weapons while the remaining articles cover “hands on” topics covering GaN technology.

To aid designers of GaN power amplifiers (PA), Wolfspeed has selected several recent articles published by Microwave Journal, creating this handy eBook reference. We begin with a survey of the RF GaN market written by the consulting firm Yole Développement. “The RF GaN Device Market: A Roller-Coaster Ride.” Then “A Dive into Integrated PA Topologies for 5G mMIMO,” written by Wolfspeed, discusses the benefit of using GaN rather than LDMOS and how best to design the GaN PA. The article “Broadband, High Efficiency, Class J Power Amplifier Design Method with Compensating Drain-Source Capacitance,” written by authors from Hangzhou University and the University of Kent, describes a single-ended GaN PA design covering the cellular bands from 1.4 to 3.6 GHz that achieves approximately 10 W output power, between 60 and 68 percent drain efficiency and an adjacent channel power ratio better than −30 dBc. The next article, “Doherty Power Amplifiers Move to mmWave,” written by PRFI, describes the design of an asymmetric Doherty PA MMIC for the 28 GHz 5G band. The design was processed using Wolfspeed’s 0.15 μm GaN on SiC foundry process. The next article, “The Maximally Efficient Amplifier,” written by Rohde & Schwarz, explores the theoretical circuit approaches for maximizing a PA’s efficiency: waveform engineering, supply modulation and load modulation. The eBook concludes with “Choosing the Right Signal Source for Reliable Measurements,” a cautionary reminder from Rohde & Schwarz that the quality of the signal source causes measurement uncertainty and error.