A miniaturized frequency reconfigurable antenna with half-mode CRLH-embedded metamaterial arm

Abstract

Metamaterial properties of a novel half-mode CRLH unit cell are investigated and hence a compact dual-wideband antenna is designed using an array of four unit cells. The negative refraction of the metamaterial cell is utilized to miniature the antenna. A via-free open stub, in combination with an interdigital capacitor, makes the half-mode CRLH unit cell. The proposed antenna operates at both C-band (6.2–6.8 GHz) and X-band (8.5–9.2 GHz). The dual-wideband antenna is enabled with frequency reconfigurability by incorporating RF PIN diode in its ground plane in the next design step. The ON–OFF conditions of the PIN diode electrically switch the antenna into dual-band and single-band modes, respectively. In OFF state of the diode, the antenna behaves as a monopole and operates in single-band mode resonating at C-band (5.9–6.5 GHz) only. The measured results of the fabricated sample are in good agreement with the simulated ones.

KEYWORDS:

• Metamaterial
• half-mode CRLH
• reconfigurable antenna
• C-band
• X-band

Disclosure statement

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

Additional information

Notes on contributors

Puspendu Bikash Saha

Puspendu Bikash Saha received his M.Tech degree in Communication Engineering in 2015 from National Institute of Technology Agartala, India. Currently he is pursuing Ph.D from the same institution. He has around three years of teaching experience. His research interests are wideband reconfigurable antennas, MIMO antennas, wearable antennas, microwave filters and so on. Email: [email protected]

Dibyendu Ghoshal

Dibyendu Ghoshal received his Ph.D (Tech) degree from Institute of Radio Physics & Electronics, Calcutta University in 1997. He has more than twelve years of teaching experience. He is the author of more than 150 research articles. His areas of interest are microwave and millimeter wave applications, antenna engineering, semiconductor physics and devices, image processing and so on. Email: [email protected]

Rajib Kumar Dash

Rajib Kumar Dash received his M.Tech degree in Communication Engineering in 2015 from Biju Patnaik University of Technology, Odisha and currently pursuing Ph.D from National Institute of Technology Agartala. He has around eleven years of teaching experience. His research interests are multiband fractal antennas, wideband antennas, wearable antennas, metamaterial based antennas and so on. Email: [email protected]