Md. Rokunuzzaman

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This paper addresses the performance evaluation of a modified square loop antenna design for UHF RFID applications that is excited through a narrow feed line connected to a square loop, an impedance matching network. The square loop dimensions are modified to reach a conjugate impedance matching. A gap is fixed between the feed-lines to link the chip. To(More)
A multiband microstrip antenna is proposed in this paper. By using a circular slot at the ground plane, the circular radiation at the antenna frequency resonances has been achieved. A patch is designed with a coupled U-shaped line. To gain resonance at the lower frequency, a microstrip line is introduced at the middle of the circular slot. The assessment of(More)
This paper describes a prototype mobile robot which will harvest energy when its own power reserve is diminishing while working. The need of power restoration of the mobile robot drives it automatically by auto plugging-in with the help of a microcontroller interfaced with a motor control circuit. For the development of the system a prototype mobile robot(More)
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