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Showing 1 to 6 of 6 for “"Reactive loading"”.
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A characteristic mode perturbation approach for antenna loading design
Reactive loading is commonly applied to antennas to modify input impedance and radiation pattern properties. However, reactive loading design approaches based on experience, intuition, and modeling are challenged as the demand grows for antennas with increased functionality and performance. New …
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Design and modelling of beam steering antenna array for mobile and wireless applications using optimisation algorithms. Simulation and measrement of switch and phase shifter for beam steering antenna array by applying reactive loading and time modulated switching techniques, optimised using genetic algorithms and particle swarm methods.
… RF input source and the steering elements are reactively tuned by varactor diodes in series with small inductors. The beam-control procedure was derived through the use of a genetic algorithm based on adjusting the required reactance values to obtain the optimum solution as indicated by the …
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Controlling coupling in an electrically steerable parasitic array
… operation the radiators can be loaded with reactive elements. To preserve the array properties across bands, a means to control the coupling between driven and parasitic elements is needed. The control mechanisms must be inexpensive and simple to implement. They should not fundamentally …
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Lossless multi-way power combining and outphasing for radio frequency power amplifiers
… four 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 …
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Superdirectivity and the Application of Complementary Split Ring Resonators in Directivity Enhancement of Millimeter-Wave Antennas
… review, a recent redirection away from reactive loading and towards geometric optimization of array elements is noticed. However, directivity bandwidth is rarely addressed in modern work. Accordingly, the main aim of this thesis is creating dynamic designs that are easily tuned to …
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Design and Implementation of Reconfigurable and MIMO Antennas for Future Heterogeneous Wireless Systems
… some properties of the antenna usually by loading the reactive loading of the resonator by means of active electronic elements including varactor diode or PIN diode with extra circuitry. The main objective of this research is to design and investigate low-profile antennas for heterogeneous …