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A circuit-level CAD method based on circuit envelope (CE) simulation is presented to analyze the nonlinear behavior of Doherty power amplifiers (DPAs) in LDMOS technology, when driven by non-constant envelope signals. In this paper, a general nonlinear model has been extracted for an RF LDMOS power transistor. Then, a complete CE analysis is applied to a designed DPA using the extracted model at 3...
An active antenna for transmitter application in S frequency band is designed and analyzed using harmonic balance technique which is based on the nonlinear model of active devices. In this active antenna, the amplifier is integrated with the radiator which is a rectangular patch antenna. This patch antenna is analyzed with full-wave momentum method. The splitting algorithm is applied to solve the...
This paper demonstrates a three-stage hybrid-distributed amplifier based on Darlington configuration to achieve high gain and over several octaves of bandwidth for microwave and millimeter-wave frequency applications. The Darlington single-stage distributed amplifier (DSSDA) is used as traveling wave gain stages to improve the gain performance of the conventional distributed amplifier. This configuration...
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