Study of the communication distance of a MEMS Pressure Sensor Integrated in a RFID Passive Tag

Abstract

The performance of a MEMS (Micro Electro-Mechanical Systems) Sensor in a RFID system has been calculated, simulated and analyzed. It documents the viability - from the power consumption point of view - of integrating a MEMS sensor in a passive tag maintaining its long range. The wide variety of sensors let us specify as many applications as the imagination is able to create. The sensor tag works without battery, and it is remotely powered through a commercial reader accomplishing the EPC standard Class 1 Gen 2. The key point is the integration in the tag of a very low power consumption pressure MEMS sensor. The power consumption of the sensor is 12.5 uW. The specifically developed RFID CMOS passive module, with an integrated temperature sensor, is able to communicate up to 2.4 meters. Adding the pressure MEMS sensor - an input capacity, a maximum range of 2 meters can be achieved between the RFID sensor tag and a commercial reader (typical reported range for passive pressure sensors are in the range of a few centimeters). The RFID module has been fabricated with a CMOS process compatible with a bulk micromachining MEMS process. So, the feasibility of a single chip is presented

Printed single-chip UHF passive radio frequency identification tags with sensing capability

“…In addition, extra circuitry must be added to the reader in order to measure these parameters. Other approaches are based on microcontroller architectures with RFID chips and different types of sensors: temperature, light, moisture content [32,33]; chemical sensing [7,[34][35][36][37][38]; printed moisture sensors [4,5,12,13]; pressure [39]; or built-in sensors, typically temperature sensors [40]. There are also some examples of single chip architecture without microcontroller unit already reported [41][42][43].…”

Study on Temperature Sensitive Characteristics of Uhf Radio Frequency Identification Temperature Sensing Tag

“…Passive UHF Radio frequency identification (RFID) technology is considered promising among the existing Internet of Things (IoT) solutions due to its low cost, easy maintenance, and extended operating range. Besides the conventional identification function, researchers and manufacturers have tried to add sensing functions to it, such as temperature [1], humidity [2], pressure [3], leading to an emerging research and application area.…”

Passive UHF RFID Tag with Multiple Sensing Capabilities

“…Furthermore, extra-circuitry typically has to be included into the RFID reader to monitor the tag analog response. On the other hand, other approaches are based on microcontroller architectures in combination with RFID chips and different types of sensors: temperature, light, and moisture content [ 20 , 21 ]; chemical sensing [ 22 , 23 , 24 , 25 ]; printed moisture sensors [ 26 , 27 ]; pressure [ 28 , 29 ]; general RFID platforms for different sensing applications [ 30 , 31 ], SAW sensors [ 32 ] or built-in sensors, commonly temperature sensors [ 33 ]. Additionally, some examples of single-chip architecture without microcontroller units have been reported by [ 34 , 35 , 36 , 37 ].…”