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This paper presents a simple integrated reference based adaptive matching network capable of undertaking real time antenna tuning for applications such as wearable wireless sensors. The signal sent to the antenna is compared to a reference signal using a single flip-flop acting as a phase detector. In case of an impedance mismatch, a counter controlling a capacitor bank is activated reducing the sensed...
Free space methods for electromagnetic compatibility (EMC) antenna calibrations at Open Area Test Site (OATS) are not suitable for monopole antennas due to corresponding large wavelengths in low-frequency bands. As an alternative, the Equivalent Capacitor Substitution Method (ECSM) is commonly adopted now. In this paper, a major uncertainty factor of capacitance accuracy is investigated by simulation...
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