Investigation of GaN-HEMT Based Switches for Hybrid Switching Amplifier Supply-Modulators
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Robert Perea-Tamayo
,
Per N. Landin
Abstract
An investigation of GaN-HEMT based switching stages in hybrid switching amplifiers (HSA) for wide-bandwidth supply modulation of RF power amplifiers is presented. The HSA is designed for maximum 15 V supply voltage, 1 A supply current and 10 MHz bandwidth. GaN-HEMT switch designs with alternative gate drive circuitry are investigated with regard to power, efficiency and linearity under different load conditions using simulations and measurements of the fabricated circuits. The full HSA showed an efficiency of 49.7% for a WCDMA envelope. A modified switching stage with improved gate-drive circuitry shows 85% efficiency in a 15 V buck-converter test-circuit for a 10 V conversion at 1 MHz over a 15 Ω load.
©[2012] by Walter de Gruyter Berlin Boston
Articles in the same Issue
- Masthead
- Editorial
- Slew-Rate and Efficiency Trade-off in Slow Envelope Tracking Power Amplifiers
- A Four-Antenna 802.11a Receiver integrated in 0.25 µm SiGe BiCMOS with Spatial Weighting
- Investigation of GaN-HEMT Based Switches for Hybrid Switching Amplifier Supply-Modulators
- Reconfigurable 4 × 4 Switch Matrix for Ka-Band Geo-Stationary Satellite Mission
- On-Orbit Verification of a 4 × 4 Switch Matrix for Space Applications based on the Low Temperature Co-fired Ceramics Technology
- A Novel Sequential Monte Carlo Method Based Synthetic Aperture Reconstruction Approach for Real-Time 3D Wireless Local Positioning
- Extraction of Micro-Doppler Signatures using Automotive Radar Sensors
- Non-Contacting Moisture Sensing using a Dedicated UWB Time Domain Instrument
- Design and Test of an Imaging System for UWB Breast Cancer Detection
Articles in the same Issue
- Masthead
- Editorial
- Slew-Rate and Efficiency Trade-off in Slow Envelope Tracking Power Amplifiers
- A Four-Antenna 802.11a Receiver integrated in 0.25 µm SiGe BiCMOS with Spatial Weighting
- Investigation of GaN-HEMT Based Switches for Hybrid Switching Amplifier Supply-Modulators
- Reconfigurable 4 × 4 Switch Matrix for Ka-Band Geo-Stationary Satellite Mission
- On-Orbit Verification of a 4 × 4 Switch Matrix for Space Applications based on the Low Temperature Co-fired Ceramics Technology
- A Novel Sequential Monte Carlo Method Based Synthetic Aperture Reconstruction Approach for Real-Time 3D Wireless Local Positioning
- Extraction of Micro-Doppler Signatures using Automotive Radar Sensors
- Non-Contacting Moisture Sensing using a Dedicated UWB Time Domain Instrument
- Design and Test of an Imaging System for UWB Breast Cancer Detection
