A Compact Wideband Antenna with DGS for IoT Applications using LoRa Technology

A highly miniaturized antenna for IoT applications using LoRa technology is discussed in this paper. The antenna is double leaf shaped with DGS and is printed on FR4 substrate of size
$22\times 34\times 0.5\text{mm}^{3}$
. The antenna has been designed and optimized to resonate at 433MHz and to include the LoRa frequency bands of 868MHz and 915MHz also. The simulated and experimental results of the antenna is in good agreement with a low VSWR in the operating range along with a radiation efficiency of 97% and a maximum gain of 2. 56dB. The size and performance of the proposed antenna are the main stand outs when compared with the similar antennas working in the same operating frequencies.