J Electromagn Eng Sci Search

CLOSE

 J Electromagn Eng Sci > Volume 13(3); 2013 > Article
 Journal of Electromagnetic Engineering and Science 2013;13(3):189-191. DOI: https://doi.org/10.5515/JKIEES.2013.13.3.189
 Compact Metamaterial-Based Tunable Zeroth-Order Resonant Antenna with Chip Variable Capacitor Youn-Kwon Jung, Bomson Lee Dept. of Electronics and Radio Engineering, College of Electronics and Information, Kyung Hee University Abstract This letter presents a compact metamaterial-based tunable zeroth-order resonant antenna. It is based on the double-negative unit cell with a function of tunable inductance realized by a varactor and impedance convertor in the shunt branch. The resonant frequency of the designed antenna ranges from 2.31 to 3.08 GHz, depending on the capacitance of the used varactor. Its size is very compact ($0.05{lambda}_0{times}0.2{lambda}_0$) with a relatively wide tunable range of 29.1%. The impedance bandwidth of the antenna is from 20 to 50 MHz for the resonant center frequency. The measured maximum total realized gain is from -0.68 dBi (2.43 GHz) to 1.69 dBi (2.97 GHz). The EM-simulated and measured results are in good agreement. Key words: Metamaterials, Negative Refractive Index, Small Antenna, Zeroth-Order Antenna

Editorial Office
#706 Totoo Valley, 217 Saechang-ro, Yongsan-gu, Seoul 04376, Korea
Tel: +82-2-337-9666    Fax: +82-2-6390-7550    E-mail: admin-jees@kiees.or.kr