22 April 2021

An April 22nd Microwaves&RF-hosted live webinar sponsored by Tabor Electronics and Astronics Test Systems

 

Summary

The need for faster and faster data rates in cellular systems creates a number of design challenges for analog RF engineers, especially those designing amplifiers or transmitter output stages. The underlying dominant cellular transmission technology is Orthogonal Frequency Division Multiplex (OFDM), and while it has excellent multipath resilience, things become more problematic as you increase the throughput of the transmission. Wider bandwidths mean more modulated carriers and this will inevitably increase the peak to average ratio of the signal. High peak signals will cause intermodulation distortion, which then generates spectral regrowth , adjacent channel interference. and a deterioration of the EVM performance.

In this session we will talk about various amplifier stimulus signals that will help you get the most insight into how your amplifier is going to perform. Stating with fundamentals of a two-tone stimulus through to the use of multi-tones with various phase relationships that allow you to stress the amplifier deterministically. Then we will look at the OFDM signal and how different test signals for 4G, 5G, and WiFi are employed to create peaks signals causing different types of spectral regrowth. We will also discuss how to reduce spectral regrowth with techniques such as waveform clipping and envelope tracking.

We’ll discuss some theory, some practical aspects and have a number of measurement demonstrations, using analog signal generators and arbitrary waveform generators. You will gain some great insights and come away with some solid techniques on how to make effective measurements and fully understand how to get the most performance out of your amplifier and output stage.

Speakers

Jonathan Netzer, Product Director

Jonathan joined Tabor Electronics in 2007 soon after finishing his Electrical Engineering studies. He began his way as a Field application engineer and later on became a Regional Account Manager. In 2012 Jonathan assumed the responsibilities of Product Marketing Manager and in 2016 was appointed Product Director responsible for Tabor’s product definition and roadmap.

Jonathan holds a BSc. in Electrical engineering and an MBA from the Technion, Israel Institute of Technology.

Mark Elo, US National Sales Manager

Mark began his career as a design engineer in Hewlett-Packard’s Microwave Division in 1990 and has since held various senior engineering and management positions at Agilent Technologies, Anritsu, Gigatronics, and Keithley Instruments in R&D, Marketing, and Business Development. Mr. Elo has almost 30 years of test and measurement experience in microwave instrumentation, especially with respect to signal simulation and spectrum analysis – specializing in product definition and product realization of RF and Microwave frequency synthesis and analysis platforms. He has also held the Chair for the AXIe Marketing Committee, participated in wireless standards, and has published multiple articles.

Joan Mercadé, Field Application Engineer

Joan Mercadé is a Telecommunications Engineer by the UPC (Polytechnical University of Catalonia) in Barcelona, Spain. He has been involved in the support, definition, and development of high-performance T&M products and systems including AWGs for companies such as Philips, Tektronix, Agilent/Keysight, R&S, or Tabor for over 35 years. In 2006 he created the Arbitrary Resources consulting company, specializing in the arbitrary waveform generation field. Since then, he has been involved in the development of application specific solutions and technical literature for the leading companies in the AWG market such as Tektronix, Keysight, or Tabor Electronics, especially for Complex Modulation, UWB, and Radar signal generation. Currently, he is a Field AE and Technical Leader working exclusively for Tabor Electronics. He is an active member of several chapters of the IEEE and holds several US and EU patents in the field of ultra-high-performance arbitrary waveform generation.

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