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Abstract
This letter explores an innovative approach to designing a compact, dual-band, omnidirectional, horizontally polarised (OHP) patch antenna with a low profile. The antenna’s ground plane is meticulously etched with radial and arch slots to create open-circuited stubs. This design generates two circulating current loops: one beneath the circular patch and the other on the outer side of the circular patch, comprised of four circular stubs. These current loops operate in unison to produce dual-band resonance and in-phase circulating current on the ground at both resonance frequencies. The antenna’s configuration includes four circular stubs formed by printing sequential radial and bent slots beneath the patch. This arrangement generates an omnidirectional radiation pattern in the azimuth plane at the upper resonance frequency. In addition, four open circular stubs outside the patch are integrated into the ground plane cascaded to the inner four stubs to achieve resonance at the lower frequency. The complete dimensions of the proposed antenna configuration are 0.29λ0 × 0.29λ0 × 0.025λ0, with bandwidths of 2.84% and 2.77% corresponding to measured resonance frequencies of 2.457 and 5.27 GHz, respectively. The measured gains are 1.2 dBi at the lower resonance frequency and 0.8 dBi at the upper resonance frequency. Furthermore, the measured roundness of the radiation pattern remains within 1 dB at the lower frequency band and within 2.8 dB at the upper-frequency band.
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No potential conflict of interest was reported by the author(s).
Additional information
Notes on contributors
Golak Santra
Golak Santra earned his BE degree in electronics & telecommunication engineering from the Indian Institutes of Engineering Science and Technology, Shibpur, Howrah, India, in 2004. He subsequently pursued his ME degree in electronics & telecommunication engineering from Jadavpur University, Kolkata, India, which he completed in 2006. Currently, he holds the position of assistant professor at the Department of Electronics Engineering at Sardar Vallabhbhai National Institute of Technology in Surat, India. His primary areas of expertise and interest encompass planar antennas, wearable antennas, and dielectric resonator antennas.
Piyush N. Patel
Piyush N Patel presently serves as an associate professor within the Department of Electronics Engineering at Sardar Vallabhbhai National Institute of Technology. Accumulating over two decades of experience in both teaching and research, he has demonstrated a profound commitment to his field. His scholarly contributions encompass more than 40 research articles featured in distinguished national and international conferences and esteemed journals. Piyush's scholarly pursuits have been particularly drawn to the advancement of nano-optical and microwave sensors. He actively engages with diverse research and funding organisations, including DRDO, TEQIP, MEITY, and DBT, further underscoring his dedication to pushing the boundaries of knowledge. His impact is not limited to his research, as he actively participates as a reviewer and holds editorial positions in prestigious outlets such as Optics Communications (Elsevier), IEEE Sensors Journal UK, and WESEAS Transactions on Communication Greece, among others. As a testament to his commitment to nurturing emerging talent, Piyush currently oversees the doctoral endeavours of six scholars in modern research. This leadership in academia and research showcases his influential role in shaping the future of his field. Email: [email protected]