Design Trade-Offs and Challenges on Miniaturized Antenna for Bluetooth in Internet of Things Applications

This article focuses on miniaturized antenna for Bluetooth in Internet of Things (IoT) applications.Dielectric and printed circuit board (PCB) antennas are commonly used in the Bluetooth applications under 2.4GHz industrial, scientific, and medical (ISM) band.Bluetooth Low Energy (BLE) technology is one of the suitable platforms and technology for IoT applications under this ISM band.Antenna is typically occupied one-third size of overall circuit; therefore, a small, low profile and low-cost antenna is a good advantage for the commercial and medical applications.In this article, miniaturized antennas have their pros and cons in its performance and applications were presented as well as the design trade-offs and challenges on dielectric and PCB antennas for Bluetooth in IoTs applications were reviewed.