RFID tags with double rectangular spiral antennas, system stability optimization under delayed electromagnetic interference and parasitic effects

2015 ◽  
Author(s):  
Ofer Aluf
Keyword(s):  
Electromagnetic Interference ◽  
System Stability ◽  
Rfid Tags ◽  
Spiral Antennas ◽  
Parasitic Effects

scholarly journals A Low EMI DC-DC Buck Converter with a Triangular Spread-Spectrum Mechanism

Energies ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 856
Author(s):  
Jing-Yuan Lin ◽  
Yi-Chieh Hsu ◽  
Yo-Da Lin
Keyword(s):  
Spread Spectrum ◽  
Electromagnetic Interference ◽  
Output Voltage ◽  
Buck Converter ◽  
Circuit Board ◽  
System Stability ◽  
Maximum Efficiency ◽  
Load Current ◽  
Voltage Range ◽  
Switching Regulators

In this paper, a triangular spread-spectrum mechanism is proposed to suppress the electromagnetic interference (EMI) of a DC-DC buck converter. The proposed triangular spread-spectrum mechanism, which is implemented in the chip, can avoid modifying the printed circuit board of switching regulators. In addition, a lower ripple of output voltage of switching regulators and a better system stability can be realized by the inductive DC resistance (DCR) current sensing circuit. The chip is fabricated by using TSMC 0.18-μm 1P6M CMOS technology. The chip area including PADs is 1.2 × 1.15 mm2. The input voltage range is 2.7~3.3 V and the output voltage is 1.8 V. The maximum load current is 700 mA. The off-chip inductor and capacitor are 3.3 μH and 10 μF, respectively. The experimental results demonstrate that the maximum spur of the proposed DC-DC buck converter with the triangular spread-spectrum mechanism improves to 14dBm. Moreover, the transient recovery time of step-up and step-down loads are both 5 μs. The measured maximum efficiency is 94% when the load current is 200 mA.

Proposal of Intelligent Inventory System for Space Station with IC Tag - Near Real-Time Onboard Inventory Management

2011 ◽  
Vol 103 ◽  
pp. 68-70 ◽  
Author(s):  
Kazuhito Shimada ◽  
Yusaku Fujii
Keyword(s):  
Real Time ◽  
International Space Station ◽  
Inventory Management ◽  
Electromagnetic Interference ◽  
Space Station ◽  
Inventory System ◽  
Radio Propagation ◽  
Rfid Tags ◽  
International Space

Difficulty in inventory management on space station has been known since 1980’s but still is a new problem. We propose the expanded application of IC tags for the International Space Station inventory management. Use of multiple RFID tags can monitor package use status. Where electromagnetic interference or poor radio propagation is a problem, we may apply ultrasound tags.

scholarly journals High performance DC/DC buck converter using sliding mode controller

2019 ◽  
Vol 10 (4) ◽  
pp. 1806
Author(s):  
Mustafa Abbas Fadel Al-Qaisi ◽  
Mohanad A. Shehab ◽  
Ammar Al-Gizi ◽  
Mohammed Al-Saadi
Keyword(s):  
Electromagnetic Interference ◽  
High Performance ◽  
Pulse Width Modulation ◽  
Sliding Mode ◽  
Maximum Output Power ◽  
Buck Converter ◽  
System Stability ◽  
Control Technique ◽  
Sliding Mode Controller ◽  
Maximum Output

<span>This paper investigated the performance of the sliding mode control technique for dc/dc converter using frequency response method. The applications of the step down type switching regulator) buck converter (are found in the devices that use batteries as power source like laptop, cell phones, electric vehicle, and recently, it  has also been used in the renewable energy processing, as a maximum output power can be achieved at higher efficiency. In order to optimize the efficiency and for convenient power management, the issues like power on transients, the effect of load variation, Switching and Electromagnetic interference (EMI) losses has to be overcome for which controllers are used. In the proposed method, pulse width modulation (PWM) based on proportional-integral-derivative sliding mode voltage controller (PID SMVC) is designed for a buck converter and the response for appropriate control parameters has been obtained. The system stability has been examined and analyzed from the performance characteristics, which shows clearly that the buck converter controlled by the sliding mode controller has fast dynamic response and it’s very efficient for various applications.</span>

A Method for Identifying Multiple RFID Tags in High Electromagnetic Interference Environments

2015 ◽  
Vol 38 (4) ◽  
pp. 346-352 ◽  
Author(s):  
Jonnatan F. Aviles Gonzalez ◽  
Neale R. Smith ◽  
Cesar Vargas-Rosales
Keyword(s):  
Electromagnetic Interference ◽  
Rfid Tags
Sign in / Sign up

Export Citation Format

Share Document