Triple-feed circularly polarized triangular slot antenna using metamaterial transmission lines

Kwok L. Chung, Chi-Ho Wong, Pak-Laam Cheung, Ka-Ho Chan

    Research output: Contribution to journalArticlepeer-review

    5 Citations (Scopus)

    Abstract

    This article presents a metamaterial transmission-line-based triple-feed network, which is meant for wideband circularly polarized antennas. The feed network itself is capable of an octave bandwidth, from 1.6 to 3.2 GHz, for an amplitude error of ±0.5 dB and phase error of ±10°. Prototype of a triangular slot antenna was implemented to validate the proposed triple-feed network. The measurement results show that the entire antenna has an impedance bandwidth (standing-wave-ratio ≤ 2) of 73.4%, whereas the 3-dB axial-ratio bandwidth is obtained at 27%. Bidirectional beam patterns with opposed polarization senses have been observed.
    Original languageEnglish
    Pages (from-to)1419-1423
    Number of pages5
    JournalMicrowave and Optical Technology Letters
    Volume54
    Issue number6
    DOIs
    Publication statusPublished - 2012

    Keywords

    • metamaterials
    • slot antennas

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