Semicircular multiband ACS feed antenna for IoT

In this communication, design and analysis of a semicircular multiband asymmetrical coplanar strip (ACS) feed antenna operating over the frequency range of GSM 1800, Bluetooth (2.4–2.484 GHz)/Wi-Fi (2.4 GHz) for IoT (Internet of Things) has been investigated. The proposed antenna consists of two semicircular arcs which provide services in the GSM 1800, Bluetooth and Wi-Fi in ISM frequency band facilitating the multiband behavior. The antenna is fabricated on a low cost FR4 substrate of thickness 1mm and has the most compact dimension of 24 × 10 mm
²
. The fabricated prototype yields a measured impedance bandwidth of 1.725–1.9115 GHz, 2.25–2.6555 GHz covering operating frequencies of GSM, Bluetooth and Wi-Fi frequency bands respectively. Good electrical characteristics in frequency domain makes the antenna suitable for IoT application deployment.