Design of a Multi-Antenna Portable IoT Terminal

An Internet of Things (IoT) terminal supporting four frequency bands is presented. The dimension of the terminal is $300 \times 30 \times 0.8$ mm
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. It integrates a LoRa 868 MHz antenna, a dual-band GNSS antenna (used for Galileo navigation), and a LoRa 2.4 GHz Inverted-F Antenna (IFA) realized on an FR4 substrate. This kind of terminal can be manufactured directly through a printed circuit board (PCB) technology, which makes it low-cost and suitable for IoT applications.