A High-Gain Power-Matching Technique for Efficient Radio-Frequency Power Harvest of Passive Wireless Microsystems

2010 ◽  
Vol 57 (10) ◽  
pp. 2685-2695 ◽  
Author(s):  
Nima Soltani ◽  
Fei Yuan
Keyword(s):  
Radio Frequency ◽  
High Gain ◽  
Radio Frequency Power ◽  
Power Matching ◽  
Passive Wireless Microsystems ◽  
Matching Technique ◽  
Wireless Microsystems ◽  
Frequency Power

scholarly journals Radio-Frequency Power Harvest And Remote Clock Frequency Calibration Of Passive Wireless Microsystems

2021 ◽  
Author(s):  
Nima Soltani
Keyword(s):  
Radio Frequency ◽  
Detailed Analysis ◽  
Supply Voltage ◽  
Radio Frequency Power ◽  
Clock Frequency ◽  
Voltage Multiplier ◽  
Power Matching ◽  
Passive Wireless Microsystems ◽  
Wireless Microsystems ◽  
Frequency Power

This thesis deals with radio frequency power harvest and remote calibration of system clock of passive wireless microsystems. The proposed method of RF power harvesting utilizes a step-up transformer inserted between the antenna and voltage multiplier of passive wireless microsystems to perform both impedance transformation for power matching and voltage amplification prior to rectification. The series resistance of the primary winding is minimized while in the secondary winding, the shunt capacitive losses are minimized. The detailed analysis of the proposed method and simulation results from Spectre of Cadence Design Systems are presented. The proposed power-matching and gain -boosting network, together with voltage multipliers, has been implemented in TSMC-0.18..m 1.8V6-meatl CMOS technology with thick metal options. For the purpose of comparison, a LC power-matching and gain-boosting network with the identical voltage multiplier has also been implemented on the same chip. Measurement results demonstrate that the proposed transformer power-matching and gain-boosting technique greatly improves the power sensitivity and efficiency as compared with widely used LC matching approaches. The proposed calibration method adjusts the frequency of the local oscillator of passive UHF wireless transponders to the desired values using an injection-locked phase-locked loop (IL-PLL). A new relaxation oscillator whose oscillation frequency is less sensitive to supply voltage fluctuation is also proposed. The power consumption of the proposed IL-PLL is minimized by operating it the sub-threshold. A detailed analysis of non-harmonic injection locking of relaxation oscillators including locking and pulling dynamics is presented. A new integrating feedback is proposed to increase the lock range and hold the locked frequency in the absence of the injection signal. The proposed ILL-PLL has been fabricated in TSMC-0.18.

scholarly journals Radio-Frequency Power Harvest And Remote Clock Frequency Calibration Of Passive Wireless Microsystems

2021 ◽  
Author(s):  
Nima Soltani
Keyword(s):  
Radio Frequency ◽  
Detailed Analysis ◽  
Supply Voltage ◽  
Radio Frequency Power ◽  
Clock Frequency ◽  
Voltage Multiplier ◽  
Power Matching ◽  
Passive Wireless Microsystems ◽  
Wireless Microsystems ◽  
Frequency Power

This thesis deals with radio frequency power harvest and remote calibration of system clock of passive wireless microsystems. The proposed method of RF power harvesting utilizes a step-up transformer inserted between the antenna and voltage multiplier of passive wireless microsystems to perform both impedance transformation for power matching and voltage amplification prior to rectification. The series resistance of the primary winding is minimized while in the secondary winding, the shunt capacitive losses are minimized. The detailed analysis of the proposed method and simulation results from Spectre of Cadence Design Systems are presented. The proposed power-matching and gain -boosting network, together with voltage multipliers, has been implemented in TSMC-0.18..m 1.8V6-meatl CMOS technology with thick metal options. For the purpose of comparison, a LC power-matching and gain-boosting network with the identical voltage multiplier has also been implemented on the same chip. Measurement results demonstrate that the proposed transformer power-matching and gain-boosting technique greatly improves the power sensitivity and efficiency as compared with widely used LC matching approaches. The proposed calibration method adjusts the frequency of the local oscillator of passive UHF wireless transponders to the desired values using an injection-locked phase-locked loop (IL-PLL). A new relaxation oscillator whose oscillation frequency is less sensitive to supply voltage fluctuation is also proposed. The power consumption of the proposed IL-PLL is minimized by operating it the sub-threshold. A detailed analysis of non-harmonic injection locking of relaxation oscillators including locking and pulling dynamics is presented. A new integrating feedback is proposed to increase the lock range and hold the locked frequency in the absence of the injection signal. The proposed ILL-PLL has been fabricated in TSMC-0.18.

scholarly journals High performance metal–insulator–graphene diodes for radio frequency power detection application

Nanoscale ◽  
2017 ◽  
Vol 9 (33) ◽  
pp. 11944-11950 ◽  
Author(s):  
Mehrdad Shaygan ◽  
Zhenxing Wang ◽  
Mohamed Saeed Elsayed ◽  
Martin Otto ◽  
Giuseppe Iannaccone ◽  
...  
Keyword(s):  
Radio Frequency ◽  
High Performance ◽  
Radio Frequency Power ◽  
Metal Insulator ◽  
Frequency Power

Metal–insulator–graphene diodes are proved to be able to deliver high performance, and meanwhile are suitable for radiofrequency power detection.

Radio Observations of Two Large Solar Disturbances

1951 ◽  
Vol 4 (1) ◽  
pp. 51
Author(s):  
JV Hindman ◽  
AG Little ◽  
R Payne-Scott ◽  
DE Yabsley ◽  
CW Allen
Keyword(s):  
Radio Frequency ◽  
Solar Flares ◽  
Radio Frequency Power ◽  
Frequency Range ◽  
Power Flux ◽  
Apparent Position ◽  
Radio Receivers ◽  
Solar Origin ◽  
Solar Disturbances ◽  
Frequency Power

On February 17 and 21-22, 1950, two exceptionally large radio-frequency disturbances of solar origin were observed on seven radio receivers working in the frequency range from 62 to 9400 Mc/s. At each of the frequencies the radio-frequency power flux was recorded continuously during the disturbance and at several frequencies the polarization of the radiation was examined. The apparent position of the origin of the radiation was determined at one frequency. The time of commencement and the duration of the disturbances at the different frequencies were compared with each other and with those of associated phenomena, solar flares, radio fade-outs, and geomagnetic effects. The two disturbances show marked similarities and marked differences ; these are summarized.

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