UHF is the latest evolution in RFID technology offering longer read range and enabling new types of sensing applications. As capable as UHF RFID is, passive sensing tags still must operate all of their circuitry by capturing RF energy transmitted from the reader. As RFID systems add more sophisticated sensors, you can run into limitations as some sensors take more energy to operate and the accuracy of certain sensors is dependent on the stability and quality of input power.
One way the RFID sensing industry has addressed these limitations is with Battery-Assisted Passive (BAP) sensors. BAP sensors provide stability and quality input power to the sensing circuits, and allow the RF communication circuits to be more efficient, often doubling the effective read range over a passive RFID sense tag. But there are still applications that will not accommodate a battery, so Phase IV has developed novel Energy Harvesting technology that brings many of the capabilities of a BAP sensor tag to a purely passive RFID tag.
Phase IV’s Energy Harvesting circuit captures and stores RF energy for the sensor circuit separately from the antenna circuit, effectively giving the sensor many of the advantages of a battery assist. Our Energy Harvesting technology effectively doubles the read range of the same purely passive standard tag, and allows more power-sensitive sensors to be used.
The Phase IV Long-Range RFID Passive UHF EPC Pressure and Temperature Sensor is an example of leveraging this technology for industry-leading advantages in purely passive RFID sensing. Breakthrough Energy Harvesting Technology is just the latest example of how Phase IV, the inventor of RFID Sensing, continues to lead the industry in technical innovation.