An Asymmetric Meandered Line Based Dual-Band ENG-TL Antenna Loaded with Complementary Closed Ring Resonators for Gain Enhancement

Abstract

In this article, an asymmetric coplanar waveguide (CPW)-fed dual-band ENG-TL antenna with gain enhancement using complementary closed ring resonators (CCRRs) has been designed and validated. The proposed antenna consists of an asymmetric rectangular patch, meandered line inductor, coplanar ground planes, square-shaped CCRRs, and a radial stub. Simulated results show that the proposed antenna offer triple-band characteristics at 1.28 GHz (1.26–1.29 GHz), 2.61 GHz (2.57–2.65 GHz), and 4.3 GHz (4.15–4.49 GHz). However, the third band has been found as weak resonance and consequently not shown in the paper. Measured results show that the proposed antenna exhibits proper dual-band characteristics covering frequencies 1.18–1.29 GHz (centered at 1.24 GHz) and 2.40–2.68 GHz (centered at 2.56 GHz). Considering f_ZOR = 1.24 GHz, presented antenna has an electrical size of 0.103 λ₀ × 0.093 λ₀ × 0.0066 λ₀. The proposed antenna has a simulated gain of 1.5 and 2.01 dB at 1.28 and 2.61 GHz, respectively, in the direction of maximum radiation. Above reflection and far-field characteristics makes this antenna suitable for aeronautical radio-navigation (960–1215 MHz), space to earth radio-navigational satellite (1215–1240 MHz) communications. Moreover, the antenna can be potentially built-in smartphones for LTE (2.5–2.69 GHz), WLAN (2.4–2.484 GHz), and WiMAX (2.5–2.69 GHz) applications where gain requirement is reasonable.

KEYWORDS:

• Asymmetric coplanar waveguide (ACPW)
• Concentric closed ring resonator (CCRR)
• Dual-band
• Epsilon negative transmission line (ENG-TL)
• Gain enhancement
• Zeroth-order resonance (ZOR)

Acknowledgements

The authors would like to thank Prof. Ananjan Basu for providing the facility to carry out the far-field measurement at Centre for Applied Research in Electronics (CARE) Lab, IIT Delhi.

Additional information

Notes on contributors

Raghvenda Kumar Singh

Raghvenda Kumar Singh was born in Kushinagar, Uttar Pradesh, India. He received his BTech degree in electronics and communication engineering from UPTU, Lucknow, Uttar Pradesh, India in 2012, MTech degree in RF and microwave engineering from Indian Institute of Technology, Roorkee, Uttarakhand, India in 2014. He is working towards his PhD degree in the field of RF and microwave engineering from Jaypee Institute of Information Technology, Noida, Uttar Pradesh, India. His research interests include modeling of metamaterial inspired antennas, metamaterial absorbers, and frequency selective surfaces. Email: [email protected]

Ashish Gupta

Ashish Gupta is currently working as an assistant professor in Jaypee Institute of Information Technology, Noida. He has done his PhD in RF and microwave engineering from Department of Electronics Engineering, Indian Institute of Technology (Indian School of Mines) Dhanbad in 2017. He did his MTech from Shri Govindram Seksaria Institute of Technology and Science, Indore in 2010. He is the author of more than 20 articles in the relevant area. His current research interests involve metamaterials and its applications in active and passive devices. He is also serving as reviewer in several peer-reviewed journals of repute.