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2026-04-06
Investigations on Circular Slot Ring Structured Antenna for Triple Band Frequencies and UWB Applications
By
Progress In Electromagnetics Research C, Vol. 168, 152-160, 2026
Abstract
In this paper, we present a Microstrip feed slot ring resonator with a central circular disc antenna that operates at triple bands. The suggested antenna covers 5G, military, radar, and UWB applications. It resonates within 2.71 GHz-12 GHz at center frequencies of 4.13 GHz (S11 = -17.9 dB), 8.53 GHz (S11 = -38 dB), and 9.09 GHz (S11 = -20 dB). Simulations of the ultrawideband antenna matched the manufactured devices. The proposed antenna has dimensions of 40 × 42 × 1.6 mm3 and is constructed on a cost-effective FR4 substrate. It achieves an operating impedance of less than -10 dB. The circular ring slot antenna shows remarkable capabilities, achieving multiband frequencies at 4.13 GHz, 8.53 GHz, and 9.09 GHz. The unique ultra-wideband design has a positive impact on gain and yields stable radiation characteristics, with surface currents contributing to a promising design. The design achieves a gain of about 5 dBi and a fractional bandwidth of roughly 128.7%.
Citation
Polavarapu Sushma Chowdary, Kollipara Radha, Ravi Kumar Maddumala, Bhupathi Ajay Kumar, and Bokkisam Venkata Sai Sailaja, "Investigations on Circular Slot Ring Structured Antenna for Triple Band Frequencies and UWB Applications," Progress In Electromagnetics Research C, Vol. 168, 152-160, 2026.
doi:10.2528/PIERC26010604
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