Abstract
In this paper, two fractal-based composite right/left-handed (CRLH) transmission lines (TLs) are proposed, and their applications in infinite wavelength resonant (IWR) antennas are investigated. In order to impose CRLH properties on the TLs, both the symmetric and asymmetric unit-cells include a gap for series capacitance and Peano-fractal curves for shunt inductance. The circuit parameters analysis shows that the proposed TLs can be used to design miniaturized IWR antennas with extended bandwidth. Then, two fractal-based IWR antennas are designed and fabricated. The measured results show that the fabricated antennas have advantages in terms of small size and wide bandwidth over the reported IWR antennas.
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