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Using OAM mode in wireless communication could be a powerful approach to enhance spectral efficiencies. An effective method for making OAM mode antenna with planar patch antennas was proposed. To verify this method, OAM mode (l = +1) antenna which has an 8-way radial power divider and uniformly circular-arrayed patch antennas was designed and tested.
This paper proposes a multiple-channel frontend system with current reuse for fetal monitoring applications. The structure and specifications of the proposed frontend system are determined while taking into consideration the algorithms used for fetal electrocardiogram (fECG) detection. Two amplifier topologies based on a middle rail current source/sink (MCS) are proposed for fECG and electrohysterogram...
This paper proposes a low-power noise scalable instrumentation amplifier (IA) for fetal monitoring applications. The noise specification of the IA is made adaptive to the peak-peak value of the fetal electrocardiography (fECG) signal, which varies for different gestational age and measurement settings. Contrary to the currently available point solution IAs, the proposed IA is scalable for a noise...
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