Compact Single-Layer Traveling-Wave Antenna DesignUsing Metamaterial Transmission Lines
Digital Object Identifier (DOI)
International Standard Serial Number (ISSN)
This paper presents a single-layer traveling-wave antenna (TWA) that is based on composite right/left-handed (CRLH)-metamaterial (MTM) transmission line (TL) structure, which is implemented by using a combination of interdigital capacitors and dual-spiral inductive slots. By embedding dual-spiral inductive slots inside the CRLH MTM-TL results in a compact TWA. Dimensions of the proposed CRLH MTM-TL TWA is 21.5 × 30.0 mm2 or 0.372¿0 × 0.520¿0 at 5.2 GHz (center frequency). The fabricated TWA operates over 1.8¿8.6 GHz with a fractional bandwidth greater than 120%, and it exhibits a peak gain and radiation efficiency of 4.2 dBi and 81%, respectively, at 5 GHz. By avoiding the use of lumped components, via-holes or defected ground structures, the proposed TWA design is economic for mass production as well as easy to integrate with wireless communication systems. ©2017. American Geophysical Union. All Rights Reserved.
composite right/left-handed (crlh) metamaterial transmission lines double spiral inductor interdigital capacitor microstrip planar antennas traveling-wave antennas antennas bandwidth defected ground structures electric lines metamaterial antennas metamaterials microwave antennas slot antennas spiral antennas wireless telecommunication systems composite right/lefthanded (crlh) metamaterial inter-digital capacitors microstripes planar antennas spiral inductor traveling wave antennas