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Showing 1 to 9 of 9 for “"Linear Power Amplifier"”.
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A digital signal processing solution for multichannel base stations
… The main design challenges of the new DSP low power combining architecture are the multichannel combining algorithm, the frequency translation of the multichannel signal to radio frequency, the Digital to Analogue Conversion (DAC) interface and the wideband ultra-linear power amplifier. This …
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Design and Development of High-Frequency Switching Amplifiers Used for Smart Material Actuators With Current Mode Control
… the design and development of two switching amplifiers used to drive the so-called smart material actuators. Different from conventional circuits, a smart material actuator is ordinarily a highly capacitive load. Its capacitance is non-linear and its strain is hysteretic with respect to its …
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Efficiency Enhancement of Base Station Power Amplifiers Using Doherty Technique
The power amplifiers are typically the most power-consuming block in wireless communication systems. Spectrum is expensive, and newer technologies demand transmission of maximum amount of data with minimum spectrum usage. This requires sophisticated modulation techniques, leading to wide, dynamic …
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A Linear RF Power Amplifier with High Efficiency for Wireless Handsets
This research presents design techniques for a linear power amplifier with high efficiency in wireless handsets. The power amplifier operates with high efficiency at the saturated output power, maintains high linearity with enhanced efficiency at back-off power levels, and covers a broadband …
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Efficiency Improvement of WCDMA Base Station Transmitters using Class-F power amplifiers
… schemes such as QPSK need, in turn, a very linear power from the output of the transmitter power amplifier in order to meet the spectral requirements. A linear power amplifier, traditionally, has very low energy efficiency. Poor energy efficiency directly affects operational costs and causes …
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Linearization of RF Power Amplifiers
Linearization of RF power amplifiers is surveyed, reviewed and analyzed. Cartesian feedback is specifically presented as an effective means of linearizing an efficient yet non-linear power amplifier. This reduces amplifier distortion to acceptable levels and enables the transmission of RF signals …
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AC Power Combining Strategy with Application to Efficient Linear Power Amplifiers
… (OFDM), suffer from high peak to average power ratios. Standard Class A and Class AB amplifiers cannot simultaneously achieve good linearity and efficiency, and therefore there has been an increase in the development of new topologies to combat this issue. Common features to these circuits …
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Wide bandwidth high efficiency power converter for rf amplifiers
… in the solutions for the high frequency power amplifiers there can be distinguished two different families of power amplifiers: linear and nonlinear. The linear power amplifiers are the amplifiers from classes A, B or AB and they are known as highly linear, but inefficient solutions. On …
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A High Temperature Wideband Power Amplifier for a Downhole Communication System
… these extreme temperatures. The proposed power amplifier (PA) has been designed for a downhole communication system operating at an ambient temperature of 230oC. GaN technology was chosen primarily due to its ability to function at a high junction temperature. The proposed PA was designed …