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In this paper, we suggest a new information space concept called Smart Floor. Smart Floor is the floor storage of specific information intended for route guidance of a mobile robot. A mobile robot can reach its goal position using the information in Smart Floor as well as automatically update information for a changing environment. We constructed Smart Floor using RFID tag packaging and fabricated...
In this paper, an ASK (Amplitude Shift Keying) modulator with DGS (Defected Ground Structure) is proposed for 900-MHz RFID (Radio Frequency Identification) system. Proposed variable DGS resonator with a varactor diode will be able to adjust the resonance frequency to achieve the ASK modulation. The variable resonance characteristics can be obtained by controlling capacitance of varactor diode, placed...
A regulated low phase noise differential colpitts VCO (voltage controlled oscillator) for mobile RFID system is presented. The differential colpitts VCO meets the multiple-interrogator environment specifications. The VCO use a 0.35 mum technology and achieves tuning range 1.55 GHz -2.053 GHz. Measuring 910 MHz frequency divider output, phase noise performance is -106 dBc/Hz and -135 dBc/Hz at 40 kHz...
In this paper, an ASK (amplitude shift keying) modulator with DGS (defected ground structure) is proposed for 900-MHz RFID (radio frequency identification) system. Proposed variable DGS resonator with a varactor diode will be able to adjust the resonance frequency to achieve the ASK modulation. The variable resonance characteristics can be obtained by controlling capacitance of varactor diode, placed...
A regulated low phase noise differential colpitts VCO (voltage controlled oscillator) for mobile RFID system is presented. The differential colpitts VCO meets the multiple- interrogator environment specifications. The VCO use a 0.35 mum technology and achieves tuning range 1.55 GHz - 2.053 GHz. Measuring 910 MHz frequency divider output, phase noise performance is -106 dBc/Hz and -135 dBc/Hz at 40...
In order to offer RFID services on mobile phones, the RFID reader must be embedded on the handset as a chip. However, the directional coupler, a ceramic passive component used in conventional handsets, of an RFID system using an identical Tx/Rx carrier frequency has a significant volume limitation compared to active components. This paper presents the directional coupler design for UHF RFID mobile...
This paper presents a highly integrated LNA operating at 8 GHz using a 0.35 mum SiGe BiCMOS process. In the LNA design, we use folded cascade topology with common emitter degeneration technique for input matching and noise matching. To prevent saturation of the following building blocks, diode bridges are added. To provide enough gain in the RF front-end receiver, three single stage LNAs are cascaded...
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