Compact Circularly Polarized Antennas Combining Meta-Surfaces and Strong Space-Filling Meta-Resonators

• Published in: IEEE transactions on antennas and propagation Vol. 61; no. 7; pp. 3442 - 3450
• Main Authors: Xu, He-Xiu, Wang, Guang-Ming, Liang, Jian-Gang, Qi, Mei Qing, Gao, Xi
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.07.2013; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Antenna measurements; Antennas; Applied sciences; Circular polarization; complementary spiral resonator; crossbar fractal tree; Exact sciences and technology; Fractals; miniaturization; Radiocommunications; reactive impedance surface (RIS); Resonant frequency; Slot antennas; space-filling; Substrates; Telecommunications; Telecommunications and information theory; Performance evaluation; Interconnection network; Resonator; Circular polarization; reactive impedance surface (RIS); Printed antenna; Fractal; Resonance frequency; Telecommunication system; complementary spiral resonator; crossbar fractal tree; Numerical simulation; Portable equipment; Axial ratio; Miniaturization; space-filling
• ISSN: 0018-926X; 1558-2221
• DOI: 10.1109/TAP.2013.2255855

Reduced-size single-feed circularly-polarized (CP) patch antennas are proposed and investigated based on the strategy of combining meta-surfaces and meta-resonators owning strong space-filling capability. They all comprise a slot-loaded square patch printed over a well designed reactive impedance surface (artificial meta-surface with magnetic response at the resonant frequency) for improved antenna performances and size reduction. The complementary crossbar fractal tree (CCFT) slot and three-turn complementary spiral resonators (TCSRs) with asymmetric gap orientation are employed as meta-resonators to render the antennas to radiate CP waves in single-band or dual-band operation and to facilitate further miniaturization. Numerical and experimental results indicate that these antennas owning a maximum size of 0.262λ 0 × 0.262λ 0 around 3 GHz exhibit a comparable impedance and axial ratio (AR) bandwidth over 1.05% and high gain of more than 4.15 dBic, predicting promising applications in portable and handheld communication systems.