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— In this paper design of 125kHz RFID antenna is presented. The optimization and improvement of electrical characteristics, including inductance and Q-factor, is also discussed. Designed RFID antenna is part of the ID card, which has standard ISO ID1. It consists of two spiral coils in two layers. Comparison of antenna in flexible and PCB technology is(More)
— In this paper a low-cost fiber-optic intensity based vibration sensor is presented. As sensing element a bundle optical fiber was used. The sensor is based on changes of the reflected light intensity in bundle fiber which is placed near the vibrating element. As the vibrating element loudspeaker cone was used. The sensor was tested in the range of(More)
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