Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 8 of 8 for “"Resistive Loading"”.
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Lossless multi-way power combining and outphasing for radio frequency power amplifiers
… or more PAs, and overcomes the loss and reactive loading problems of previous outphasing systems. It provides ideally lossless power combining, along with nearly-resistive loading of the individual power amplifiers over a very wide output power range. The theoretical fundamentals underlying the …
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Phase manipulation for efficient radio frequency transmission
… ideally lossless power combining along with resistive loading of switching power amplifiers over a wide output range. This work presents the first-ever demonstration of this system at microwave frequencies. Particular attention is paid to the microwave-specific aspects of implementation. A …
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Investigation and application of high-efficiency large-step-down power conversion architectures
… impedance network, this converter can maintain resistive loading of the inverters as the input voltage varies. To back down in power, the converter can be efficiently operated using burst (on/off) mode control. To deliver lower power, we introduce an additional control technique using Variable …
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Analysis of the Radiation Mechanisms in and Design of Tightly-Coupled Antenna Arrays
… limit the problem space and determine the proper resistive loads to control the low-frequency array-guided surface wave (AGSW). The tight physical placement also forms a periodic structure that, along with the array boundary, launches a wave across the array surface. Options to suppress this …
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Broadband acoustic energy harvesting via synthesized electrical loading
… and delivered power measurements with resistive loading. The AEH design was loaded with the designed conjugate matched load, with corresponding experimental voltage and delivered power measurements to demonstrate power output and bandwidth improvement. While stability challenges and …
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Ultra-wideband antenna design for microwave imaging applications. Design, optimisation and development of ultra-wideband antennas for microwave near-field sensing tools, and study the matching and radiation purity of these antennas within near field environment.
… equivalent cancer cells model. In addition, a resistively loaded bow tie antenna, intended for applications in breast cancer detection, is adaptively modified through modelling and genetic optimisation is presented. The required wideband operating characteristic is achieved through manipulating …
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Analysis of a Rotary Ultrasonic Motor for Application in Force-Feel Systems
… means of exploring the USMs response to additive loading, loads acting in the direction of motor motion, where only resistive loads, those opposite to the motor rotation, had been considered previously. Fundamental differences between force-feel systems comprising standard DC brushless motors as …
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Moderators of respiratory muscle function in health, exercise and disease
… a 10-week intervention of inspiratory resistive loading (IRL) study one demonstrated a 34% increase in maximum inspiratory pressure and a 36% increase in cycling endurance capacity at 75% V̇O<sub>2</sub>peak (increased time by 1292 ± 607 seconds). During the trial heart rate (HR), …