Two-dimensional efficient metamaterial-inspired electrically-small antenna

Inexpensive, efficient, and electrically‐small antenna designs are presented, which are based on a two‐dimensional (2D) metamaterial‐inspired structure driven by an electrically‐small rectangular semiloop antenna that is coaxially‐fed through a finite PEC ground plane. Measured reflection coefficients showed a very good agreement with the simulated data, where the measured resonant frequency is only 0.5% different from the numerically predicted value. The proposed 2D antenna systems are linearly scalable with frequency, and predicted radiation characteristics of the antenna systems at 300, 430, and 1580 MHz are reported. © 2007 Wiley Periodicals, Inc. Microwave Opt Technol Lett 49: 1669–1673, 2007; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.22542