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RF coils are essential part of Magnetic Resonance Imaging (MRI), which is a widely used imaging modality nowadays. Flexible surface RF coils are desired for potential higher signal to noise ratio (SNR) and ergonomic advantages. Electro-textiles are explored as potential candidate for MRI RF surface coils. A Flexible MRI RF coil for transmission or reception using electro-textiles is designed, fabricated...
An ergonomie design is explored for its potential usage in MRI surface neek coil array on a electrotextile material. A single loop surface coil for carotid artery MR imaging is designed, studied, fabricated and measured as a preliminary step for RF coil array system using electrotextile material. Comprehensive simulation with simplified human head model and detailed human head model near the coil...
Rectennas for ambient RF energy harvesting are gathering significant interest as a source of sustainable energy. Maximizing harvested energy output is challenging due to the limitations of the bandwidth of the antenna and the impedance matching of the non-linear rectifier. In this work, we propose a hemispherical array of multiband, coupled-resonator monopoles for RF energy harvesting. We employ a...
This paper proposes a new circuit model for E-shaped patch antennas (ESPA) using the multiconductor transmission line mode theory (the modal theory). First, radiation and transmission line modes generated on the ESPA are described, and an equivalent circuit is derived from the modal theory. The equivalent circuit is analyzed in detail to obtain wideband and multiband characteristics. For wideband...
Reconfigurable antennas are quite useful because of their versatility in many different applications. An innovative approach for configuring these antennas using an optimizer is investigated. This is accomplished by implementing particle swarm optimization as the antenna controller. Simulation results show rapid convergence onto optimal pixel configurations for a desired resonant frequency. In summary,...
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