2014 IEEE MTT-S International Microwave Symposium (IMS2014), 2014
ABSTRACT In this paper, a multi-port RFID tag antenna is integrated with an I2C-RFID chip along w... more ABSTRACT In this paper, a multi-port RFID tag antenna is integrated with an I2C-RFID chip along with a microcontroller unit (MCU) and a sensor to implement a low-cost wireless temperature sensor using a commercial RFID reader. The key feature of this design is a two-port patch antenna with energy-harvesting circuitry at its second port, which can acquire the supply voltage needed for the operation of RFID tag sensor from the RF signal transmitted by the reader. In addition, a secondary method of energy harvesting is included by integrating thin film solar cells in the RFID tag profile. The measurements of the fabricated tag-based sensor demonstrate that a maximum sensing/reading range of 27 m is achieved when all the circuits are powered using solar cells. When the tag is operated as a simple RFID tag with no energy harvesting employed to power up the passive RFID chip 12.1m reading range is obtained.
2008 IEEE International Conference on Semiconductor Electronics, 2008
This paper presents the design of two new ring oscillators based on differential and single-ended... more This paper presents the design of two new ring oscillators based on differential and single-ended topologies using a 0.13µm 1P8M CMOS technology. The differential oscillator utilizes feed-forward technique and a new composite load with inductive impedance, reducing the delay per stage and widening the tuning range. The output frequency ranges from 0.5 to 9.5 GHz and the circuit consumes only 9mW. The simulation result of phase noise is -85.3dBc/Hz @ 1MHz offset from centre frequency. The singleended ring oscillator with inductive composite load oscillates from 6.3 to 13.9 GHz and consumes only 5.1 mW with phase noise of -81.5dBc/Hz @ 1MHz offset from centre frequency.
2014 IEEE MTT-S International Microwave Symposium (IMS2014), 2014
ABSTRACT In this paper, a multi-port RFID tag antenna is integrated with an I2C-RFID chip along w... more ABSTRACT In this paper, a multi-port RFID tag antenna is integrated with an I2C-RFID chip along with a microcontroller unit (MCU) and a sensor to implement a low-cost wireless temperature sensor using a commercial RFID reader. The key feature of this design is a two-port patch antenna with energy-harvesting circuitry at its second port, which can acquire the supply voltage needed for the operation of RFID tag sensor from the RF signal transmitted by the reader. In addition, a secondary method of energy harvesting is included by integrating thin film solar cells in the RFID tag profile. The measurements of the fabricated tag-based sensor demonstrate that a maximum sensing/reading range of 27 m is achieved when all the circuits are powered using solar cells. When the tag is operated as a simple RFID tag with no energy harvesting employed to power up the passive RFID chip 12.1m reading range is obtained.
2008 IEEE International Conference on Semiconductor Electronics, 2008
This paper presents the design of two new ring oscillators based on differential and single-ended... more This paper presents the design of two new ring oscillators based on differential and single-ended topologies using a 0.13µm 1P8M CMOS technology. The differential oscillator utilizes feed-forward technique and a new composite load with inductive impedance, reducing the delay per stage and widening the tuning range. The output frequency ranges from 0.5 to 9.5 GHz and the circuit consumes only 9mW. The simulation result of phase noise is -85.3dBc/Hz @ 1MHz offset from centre frequency. The singleended ring oscillator with inductive composite load oscillates from 6.3 to 13.9 GHz and consumes only 5.1 mW with phase noise of -81.5dBc/Hz @ 1MHz offset from centre frequency.
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Papers by Mahdi Parvizi