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A new technique is developed to best locate the coaxial feed of a circularly polarized stacked microstrip antenna (CPSMA) with the objective of improving the axial-ratio (AR) bandwidth and CP quality of the antenna. In the proposed technique, we move the single feed on an arc between the diagonal and main axis of the driven patch to optimize CP performance. An antenna based on this technique has been...
Condition monitoring helps to avoid unexpected failures of equipments. Rolling element bearings are critical components in rotating equipments. Vibration analysis is a common method used for defect detection and diagnosis of rotating equipments without effecting their operation. The measured vibration signal contains noise, modulations and low frequency components due to unbalance, misalignment, structural...
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