Miniaturized Wideband Planar Antenna Using Interembedded Metasurface Structure

• Published in: IEEE transactions on antennas and propagation Vol. 69; no. 5; pp. 3021 - 3026
• Main Authors: Chen, Dongxu, Yang, Wanchen, Xue, Quan, Che, Wenquan
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.05.2021; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Antennas; Bandwidth; Bandwidths; Broadband; Broadband antennas; Capacitance; High gain; Impedance; Inductance; interdigital-like capacitance sawtooth gaps; interembedded metasurface (MS); metasurface antenna (MSA); Metasurfaces; Miniaturization; Resonant frequency; Size reduction; wideband; Wireless communication systems; Wireless communications
• ISSN: 0018-926X; 1558-2221
• DOI: 10.1109/TAP.2020.3028245

One kind of interembedded metasurface (MS) structure is proposed and applied to realize miniaturized wideband MS antennas (MSA). Different from conventional MSA, the proposed interembedded MSs are formed by etching slots on the radiating patch with various sawtooth schemes rather than rectangular gaps. Consequently, the resonance frequency of MSA can be decreased due to introducing those interdigital-like capacitances, while obvious miniaturization can be realized accordingly. By optimizing the parameters of the sawtooth radiating slots, a miniaturized antenna using cross-shaped interembedded MS is proposed, achieving an impedance bandwidth of 35.08% and a high gain of about 8.25 dBi with a compact overall size of <inline-formula> <tex-math notation="LaTeX">0.66\lambda _{0} \times 0.66\lambda _{0} </tex-math></inline-formula>. Moreover, one further miniaturized antenna using modified cross-shaped interembedded MS is also presented, realizing a larger impedance bandwidth of 41.35% and a high gain of about 6.62 dBi with a smaller aperture of <inline-formula> <tex-math notation="LaTeX">0.48\lambda _{0} \times 0.48\lambda _{0} </tex-math></inline-formula>. Compared with conventional MSA, 42% overall size reduction and larger bandwidth can be obtained. The design approach may provide a feasible solution to realize compact MSAs with the unique advantages of large bandwidth, low profile, low cost, and easy fabrication. Due to above good features, the proposed antenna can be a promising candidate for applications in modern wideband wireless communication systems.