Multi-standards Slot-based Antenna Design for NB-IoT and LTE-M Applications

Abstract

In this paper, a highly miniaturized folded slot-based antenna is presented for internet of things (IoT) applications. It consists of meandered slot with folded structure along with varactor diode loading. Miniaturization is obtained using a unique combination of meandered slot with folded structure that is reactively loaded with varactor diode. The antenna exhibits dual-bands operation covering frequency bands from 730~965 MHZ and 1250~1940 MHz. A single varactor diode is used to obtain a continuous frequency sweep over both bands. The proposed antenna is best suited for next generation 5G IoT applications. The proposed antenna design has a total board dimensions of 27×27 mm2.