The Doherty Amplifier is used in an increasing number of radio transmitter applications to improve energy efficiency. There are numerous ways to build the Doherty PA. This article begins with an overview of linearization and efficiency enhancement in Doherty amplifiers, highlights the associated challenges, and covers some of the numerous solutions for design.
The worldwide electric vehicle (EV) market is exploding in demand and mainstream adoption as governments push for fuel economy improvements and automotive companies look for new market opportunities. According to Forbes, “by 2020, EVs are likely to cost the same as conventional fuel powered equivalents."
This article will focus on one high-volume (primarily automotive) application that goes against this trend and this is the multi-stage LNA associated with the SDARS radio capability that is included with millions of new cars every year. It requires a cascade of multiple high-performance amplifiers and filters to meet a very difficult set of requirements.
Millimeter wave frequency bands are a proposed technology for supporting robust 5G mobile networks. Remcom contributed to an in-depth study published by the International Wireless Industry Consortium (IWPC), using Wireless InSite to analyze throughput in a complex urban scenario. These coverage results highlight potential obstacles and solutions for deployment of mmWave for 5G.