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The effect of skin tissue on the scattering of the MRI RF field by deep brain stimulation (DBS) leads is analyzed. RF induced heating occurs in the tissue surrounding the electrodes at the end of such a medical lead. The electric field and the induced temperature rise are found by solving the wave and heat equations. Spatial plots of the solutions are obtained. The presence of skin tissue also affects...
In this paper, design of a QPSK Modulator Direct at Carrier in Ku Band for on board satellite applications is presented. Since, power issue is crucial in space therefore a passive topology is implemented with low insertion loss. Besides, other parameters like Error Vector Magnitude (EVM), phase and magnitude imbalances, signal to noise ratio (SNR) and carrier suppression are also improved to a greater...
A novel single diode mixer with ultra high LO/RF, LO/IF isolation and having a reasonably good conversion loss has been designed. RF and LO signals are applied through bandpass and lowpass filters respectively. The mixer operates in C-Band and downconverts a Hock of frequencies (5.925 GHz -6.425 GHz) to a block of frequencies (3.7 GHz - 4.2 GHz) using a fixed frequency local oscillator at 2.225 GHz...
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