UHF RFID Wireless Communication System for Real Time ECG Monitoring

Electronic Health Records (EHR) and monitoring are very essential and nowadays, a large number of Internet of Things (IoT) health care devices are available but it has still difficulties to log the real time patient monitoring like heart rate variability (HRV) in the healthcare checkup center. Generally, heart rate variability (HRV) is widely assumed for evaluating the health condition of human. One of the best ways to observe the heart rate variability (HVR) information is the Electrocardiograms (ECG) for that the wired manner is the ordinary approach. Even though any wireless ECG system was suggested, the low accuracy, very short service range and the limited battery life are the major drawbacks. So, in this paper, we like to propose a new Ultra High Frequency (UHF) Radio Frequency Identification (RFID) communication system to monitor ECG signals about the heart activities. The system is designed based on the ESPAR (electronically steerable parasitic array radiator) antenna to make a beamforming to the direction of the RFID tag containing ECG sensor. Also, this paper investigates the distance between the sensor tag and the RFID reader to improve the link budget of the UHF-RFID system. Finally, it is demonstrated that the range is longer higher than the previously results.