Abstract
A bowtie shaped slot antenna with a new design is realized on a flexible and low-cost polyethylene terephthalate (PET). The slotted bowtie design is implemented with asymmetric flare angle with metal strip underneath each slot of the antenna. The designed free space antenna is fabricated using inkjet printing and tested. The measurements showed good agreement with the simulations. The fabricated antenna operates over 2.1– 4.35 GHz frequency range (69.77% fractional bandwidth) and exhibits omnidirectional radiation pattern with a peak gain of 6.3 dBi at 4.35 GHz. The bending test of the fabricated device reveals good flexibility on a curved surface without significant antenna performance degradation. The antenna is simple in structure and easy to retune to achieve the desired radiation characteristics. The tunability is validated by simulating another version of the parent antenna (free space antenna) for drywall mounting applications. The compact size, higher bandwidth, omnidirectional pattern with a higher peak gain and flexible properties of the antenna makes the design suitable for Internet of Things (IoT) applications.
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