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Go to Editorial ManagerThis paper discusses the design and performance of a frequency reconfigurable antenna for Internet of Things (IoT) applications. The antenna is designed to operate on multiple frequency bands and be reconfigurable to adjust to different communication standards and environmental conditions. The antenna design consists of monopole with one PIN diode and 50Ωfeed line. By changing the states of the diode, the antenna can be reconfigured to operate in a dual-band mode and a wideband mode. The performance of the antenna was evaluated through simulation. The antenna demonstrated good impedance matching, acceptable gain, and stable radiation patterns across the different frequency bands. The antenna has compact dimensions of (26×19×1.6) mm3. It covers the frequency range 2.95 GHz -8.2 GHz, while the coverage of the dual- band mode is (2.7-3.8) GHz and (4.57-7.4) GHz. The peak gain is 1.57 dBi for the wideband mode with omnidirectional radiation pattern. On the other hand, the peak gain of the dual-band mode is 0.87 dBi at 3 GHz and 0.47 dBi at 6 GHz with an omnidirectional radiation pattern too.
A reconfigurable inset-fed Microstrip Patch Antenna (MPA) for dual-band behavior and stable-radiation direction has been demonstrated in this research. The suggested reconfigurable antenna has dimensions of 60×50 mm2 and is printed on an FR4 substrate that is 1.5 mm thick and has a dielectric constant (εr) and loss tangent (tanδ) equal to 4.3 and 0.02, respectively. An inset-fed line with an impedance of 50Ω is used to feed the proposed antenna structure. The parasitic capacitance is efficiently added to the proposed structure by using the slitline approach. The proposed antenna is tested and simulated, where the result shows two resonant frequencies with S11 values less than -10 dB (S11 ≤ −10). The first resonant frequency is found at 2.45 GHz with a value equal to -30.5 dB, while the second resonant is found at 3.54 GHz with a value equal to -32 dB. Moreover, the slits include two PIN diodes. After analyzing the antenna, two reconfigurable bands are obtained for various uses with stable radiation direction. The suggested antenna is constructed and measured, and the outputs of the simulation and the measurements show good agreement.