A transparent ultra-thin antenna developed for mid band 5G and C-band frequencies is presented. This antenna has been engineered to operate effectively across three distinct frequency bands catering to eMBB, WIFI, and C band applications. The antenna design comprises a rectangular patch in which rectangular, circular, and semicircular slots are introduced. The ultra-thin model is realized on one side ITO-coated PET sheet as a substrate with dimensions 16x16x0.175 mm3. The ITO-coated side of the PET sheet acts as ground and the patch is realized using silver conductive paste. It operates at two bands namely 2.8 GHz and 4.9 GHz in the sub 6 region and a wide band ranging from 7.3GHz to 8.3GHz in the C band. This Model is optimized to operate effectively across these three distinct frequencies with a maximum impedance bandwidth of 12.82%. The maximum gain obtained is 3.81db at 7.5GHz. The antenna uses transparent materials to balance functionality with architectural compatibility facilitating its integration into existing environments. Experimental results confirm that the antenna matches all three bands impedance. In addition to fulfilling the demand for multifunctional antennas in compact electronic systems, this work facilitates to the improvement of seamlessly integrated wireless technologies within everyday objects.
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Jyothi Bandarupalli (2025) studied this question.
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