USA: Agilent Technologies Inc. announced two software releases that support the design and verification of envelope tracking, a technique that improves the efficiency and linearity of power amplifiers used in mobile handsets. New capabilities available in Agilent Signal Studio software and Agilent 89600 VSA software will help developers quickly optimize their envelope-tracking implementations.
In Signal Studio for LTE/LTE-Advanced (FDD or TDD), developers can now define and optimize test stimuli for power amplifiers using envelope waveforms based on the LTE in-phase/quadrature (I/Q) signal. In addition, the crucial timing alignment between envelope and I/Q can be achieved with picosecond resolution and real-time adjustments. For playback during testing, Signal Studio can download the resulting waveforms to Agilent’s X-Series signal generators and 33500 Series waveform generators.
The latest release of Agilent 89600 VSA software is uniquely able to provide simultaneous envelope and RF analysis, enabling users to characterize and optimize envelope-shaping curves and time alignment. New features include stimulus/response functions with automatic time, amplitude and phase compensation, which simplify power amplifier measurements such as AM/AM, AM/PM and gain compression. Through compatibility with Agilent X-Series signal analyzers and Infiniium oscilloscopes, the software helps users achieve deeper insights into the performance of their envelope-tracking designs.