Abstract
This paper presents the design and realization of a compact frequency reconfigurable antenna for multiband wireless applications. The antenna can operate at overall eight different bands in four dual-band modes. A slot in the radiator and defected ground structure are utilized to achieve a compact size, while PIN diodes are used for frequency reconfigurability in the proposed antenna. The antenna shows broad bandwidth in each operating frequency and has a compact size of 18 mm × 18 mm × 1.524 mm. Moreover, stable radiation patterns and a high value of efficiency make it a potential candidate for various wireless applications. Furthermore, to demonstrate the worth of this work, its performance is compared with state-of-the-art designs reported for similar applications.
Highlights
In the last decade, reconfigurable antenna gains considerable attention of researchers due to an exponential increase in the number of users connected to the internet [1,2]
Frequency reconfigurable antennas are preferred over multiband and wideband antennas because they lead to a better solution against the band congestion problems [7,8]
The PIN diodes are widely used in frequency reconfigurable antennas due to the ease of switching between different frequencies by merely controlling the biasing voltage [10]
Summary
Reconfigurable antenna gains considerable attention of researchers due to an exponential increase in the number of users connected to the internet [1,2]. Reported antennas have compact sizes, the number of frequency bands covered by the antennas are not sufficient for multiband applications Another tri-band frequency reconfigurable antenna is presented in [13], where a single diode is placed in the monopole antenna’s radiator. The summary mentioned above of literature suggests that a compact antenna having a more significant number of frequency bands while using a minimum number of diodes is still a design challenge for researchers. To overcome these challenges, a novel frequency reconfigurable antenna is presented in this paper. The discussion is concluded in the last section of the paper, accompanied by references
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