Honey Comb Structured Angularly Stable Band Stop Frequency Selective Surface Based on Hexagonal Loop Unit Cells

Abstract

A single-layer band-stop frequency selective surface (FSS) with miniaturized periodic element is proposed in this paper. The unit cell size of the proposed FSS is 0.047λ₀ where λ₀ stands for free space wavelength. The proposed unit cell consists of hexagonal concentric rings connected as a single loop by altering it by flexuous segment. Increased electrical length and effective space utilization achieve a unit cell dimension of 7.29 mm ×  12.63 mm. In addition, the proposed FSS exhibits a stable response for TE and TM modes of polarization and oblique incidences. Therefore, the proposed design ensures angular and polarization independence. The full wave EM simulation of the proposed hexagonal unit cell FSS is carried out and then fabricated using the PCB method. Simulated results are validated using different measurements.

KEYWORDS:

• Arrays
• Band stop filters
• Frequency selective surface (FSS)
• Radar cross-section
• Wireless local area network

Acknowledgements

The authors would like to thank the DST-FIST, AICTE, DST, and SSN Trust-funded RF/Antenna Measurement Facility, Department of ECE, SSN College of Engineering, Chennai, India for providing the measurements.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Notes on contributors

Dhakshinamoorthy Thavamani

Dhakshinamoorthy Thavamani is a research scholar in the Department of Physics at Sri Sivasubramaniya Nadar College of Engineering, India. He graduated in electronics and communication engineering from the University of Madras, Chennai in 2002 and a Master of Engineering from the College of Engineering, Guindy, Anna University, Chennai. He obtained his MS(EECS) from the University of Toledo, Ohio, USA in 2011 and then worked as an assistant professor at KCT College of Engineering for four years. His current research interests involve microsystem design, FSS, Surface integrated components for communication applications using femto laser micro machining and integrated circuit fabrication methods. Corresponding author. Email: [email protected]; [email protected]

Prita Nair

Prita Nair received her MSc and PhD degrees in physics from CUSAT, Kerala, India, and the Indian Institute of Technology, (IIT)Madras, Chennai, India, in 1986 and 1997, respectively. She is the recipient of the Laskar award for the best thesis in physics from IIT in 1997. Her R&D experience includes the development of optical fiber components and systems for the defense sector and the private telecom sector. Currently, she is professor in the Department of Physics, SSN College of Engineering, Chennai, India. Her current research interests are reconfigurable photonic components, MEMS, acoustic and metamaterials, and sensors. Dr Nair is a Member of the IEEE Photonics Society, OSA, and a Life Member of the Institute for smart structures and systems (ISSS), and the Indian Society for Technical Education (ISTE). Email: [email protected]

Ramprabhu Sivasamy

Ramprabhu Sivasamy is working as associate professor in the Department of Electronics and Communication Engineering. He obtained his BE in electronics and communication engineering from Kongu Engineering College, Perundurai in 2010 with a University Rank and ME in communication systems from College of Engineering, Guindy, Anna University, Chennai in 2013 with a gold medal. He was awarded a doctoral degree by Anna University in 2017 for his research work in electromagnetic shielding. He has seven years of teaching experience and industrial experience of one year as a broadcast engineer trainee (Design Engineer) at Benchmark Broadcast Systems. He has filed six Indian patents and published his research work in refereed international journals and conference proceedings. His current research interests are frequency selective surfaces, electromagnetic shielding, microwave components and antennas. He has also been involved in consultancy activities related to frequency selective surface and microwave components characterization at SSN. Email: [email protected]

Radha Sankararajan

Radha Sankararajan is a professor and the head of the department of ECE at SSN College of Engineering. She has 24 years of teaching and 15 years of research experience in wireless networks. She graduated from Madurai Kamaraj University in electronics and communication engineering in 1989. She obtained her master’s degree in applied electronics with first rank from Government College of Technology, Coimbatore and a PhD degree from College of Engineering, Guindy, Anna University, Chennai. Email: [email protected]