Abstract
This paper presents novel low-cost single- and dual-band microstrip patch antennas. The proposed antennas are realized on a square microstrip patch etched symmetrically with four slots. The antenna is designed to have low cost and reduced size to use in Internet of things (IoT) applications. The antennas provide a reconfigurable architecture that allows operation in different wireless communication bands. The proposed structure can be adjusted to operate either in single band or in dual-band operation. Two prototypes are implemented and evaluated. The first structure works at a single resonance frequency (f1 = 2.4 GHz); however, the second configuration works at two resonance frequencies (f1 = 2.4 GHz and f2 = 2.8 GHz) within the same size. These antennas use a low-cost FR-4 dielectric substrate. The 2.4 GHz is allotted for the industrial, scientific, and medical (ISM) band, and the 2.8 GHz is allocated to verify the concept and can be adjusted to meet the user’s requirements. The measurement of the fabricated antennas closely matches the simulated results.
Highlights
The Internet of things (IoT) consists of the observation region for sensing data, network region for transmitting data, and application region for connecting the objects and the cloud network
In the IoT, numeral devices, sensors, equipment, and things communicate with others through the cloud network [3]
Many antenna configuration types for IoT applications have been presented in recent years [4,5,6]
Summary
Technology growth has been increasing rapidly. Most things in the world and human life will be affected by the Internet. Modern wireless systems (IoT devices) exhibit various functions and require operation at more than one frequency without increasing the antenna size [7,8,9,10]. In this table, three of the proposed structures with good performance are included. This study proposes a slotted square patch antenna for IoT applications. The antenna is designed to have low cost and reduced size to allow use in IoT applications.
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