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Abstract
The relevance of angular stability (AS) and polarization independence (PI) is investigated by rotating the frequency selective reflectors (FSRs) kept behind a 10 GHz triangular slot antenna in orthogonal directions. Three distinct frequency selective surfaces (FSSs) based on closely packed rhombic loop (RL), square loop (SL) and merged dual rhombic loops (MDRL) are developed for the analysis under normal and oblique incidences. The gain enhancement of 4.87, 7.17 and 4.85 dB is achieved when the antenna is backed by 5 × 5 arrays of RL, MDRL and SL FSS, respectively. Later, with equal sized substrates, the gain enhancement of 7.25, 7.17 and 8.10 dB is achieved when the antenna is backed by 61 × 61 mm2 RL, MDRL and SL FSSs, respectively. It appears that stringent characteristics of FSSs i.e. AS and PI can be compromised for FSRs while employing antenna gain enhancement techniques.
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The authors have no relevant financial or non-financial interests to disclose.
Additional information
Notes on contributors
Ashish Kumar Verma
Ashish Kumar Verma was born in Uttar Pradesh, India and holds a B. Tech degree in electronics and communication engineering from Uttar Pradesh Technical University, Lucknow, and an M.Tech degree in RF and microwave engineering from Swami Vivekanand Subharti University, Meerut. He received his Ph.D. degree from Birla Institute of Technology and Science (BITS), Pilani-Campus, Pilani, Rajasthan. Currently, Ashish serves as an assistant professor in the School of Engineering and Technology at DIT University, Dehradun, Uttarakhand, India. His research expertise encompasses compact antenna design and the design and analysis of periodic structures, including frequency-selective surfaces, artificial magnetic conductors, and electromagnetic band gap structures. Proficient in design and modeling, Ashish excels in antenna and RF circuit design using CST MWS/ANSYS HFSS, and he is skilled in conducting measurements using vector network analyzers and anechoic chambers.
Rahul Singhal
Rahul Singhal is working as an associate professor in the department of electrical and electronics engineering, BITS Pilani-Campus, Pilani. He completed his BE (electronics engineering) from Nagpur University in 1999 and started his teaching career in 2000. During his tenure as lecturer, he completed his M.Tech. (digital communication) from Uttar Pradesh Technical University, Lucknow in 2007 and completed his Ph.D. in 2013 at Birla Institute of Technology and Science (BITS), Pilani-Campus, Pilani. His doctoral work lies in integrated optics involving the design and technology development of optical waveguides and uniform power distribution in optical power splitters. His current research interest lies in antenna and wave propagation; optical devices and sensors; radio-over-fiber and wireless optical networks. He has authored and co-authored technical papers in various reputed international journals and conferences. He has reviewed many technical research articles published in international journals and conferences. He is a senior member of the IEEE, a life-member of the Optical Society of India and the Institution of Electronics and Telecommunication Engineers (India).