Design of Compact Beam-Steering Antennas Using a Metasurface Formed by Uniform Square Rings

Hongnara, Tanan; Chaimool, Sarawuth; Akkaraekthalin, Prayoot; Zhao, Yan

doi:10.1109/access.2018.2799551

Cited by 48 publications

(29 citation statements)

References 29 publications

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“…In addition, it can be observed that the metasurface antenna has good impedance matching for both diode states. The difference in antenna gains in Figure 4(b) is due to the fact that the efficiency of 5 International Journal of Antennas and Propagation the metasurface behaving as a wave reflector is higher than that as a wave director [29][30][31][32].…”

Section: Resultsmentioning

confidence: 99%

“…When the diodes are reverse biased, the upshift of the resonant frequency results in a positive ε x while μ y still remains near zero, creating a MNZ metasurface at the same frequencies around 2.45 GHz. Although observed from the transmission and reflection coefficients that the metasurface is still highly reflective for plane waves, the MNZ metasurface is capable of altering wave vectors of near fields and acting as a wave director, according to our previous analysis [29][30][31][32]. Thus, a reconfigurable PIN diode-based metasurface is realized to achieve dual functionality of a wave reflector and a wave director depending on the applied bias voltage.…”

Section: Reconfigurable Metasurface Antenna Designmentioning

confidence: 97%

“…In this work, we propose a PIN diode-based reconfigurable metasurface for realization of dual operations when the diode is in different bias states. Specifically, when the PIN diode is forward biased, at the frequency of interest, the metasurface acquires the properties of epsilon-negative (ENG) materials which forbid wave propagation and reflect all incident waves with appropriate polarization; when the diode is in its reverse-biased state, the metasurface obtains properties of mu-near-zero (MNZ) materials which direct wave propagation [29][30][31][32]. Based on these two controllable functions of the proposed metasurface, we then further design a feeding dipole radiator to realize a compact beam switching antenna, and its radiation patterns can be electrically controlled by the applied bias voltage across the PIN diode.…”

Section: Introductionmentioning

confidence: 99%

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Design of a PIN Diode-Based Reconfigurable Metasurface Antenna for Beam Switching Applications

Chaimool

Hongnara

Rakluea

et al. 2019

International Journal of Antennas and Propagation

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In this paper, we propose a reconfigurable metasurface antenna for beam switching applications. The reconfigurable metasurface is formed by uniformly distributed double-split square rings loaded with positive-intrinsic-negative (PIN) diodes for dual operations of a wave reflector and a wave director. Specifically, when the PIN diodes are forward biased, an epsilon-negative (ENG) metasurface is realized which reflects all incident waves with appropriate polarization; when the diodes are reverse biased, at the same operating frequency, a mu-near-zero (MNZ) metasurface is acquired which directs wave propagation. For excitation, a dipole radiator loaded with the same type of PIN diode is designed. Simulation and measurement results show good agreement and verify the beam switching functionality of the proposed metasurface antenna.

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Section: Resultsmentioning

confidence: 99%

Section: Reconfigurable Metasurface Antenna Designmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

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Design of a PIN Diode-Based Reconfigurable Metasurface Antenna for Beam Switching Applications

Chaimool

Hongnara

Rakluea

et al. 2019

International Journal of Antennas and Propagation

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“…The phase difference between the two media is given in Reference as

Δ ϕ = k_{0} ((), n_{2} - n_{1}) w

where the k 0 is the wave number that is given by k 0 = 2 π / λ 0 and w is the width of the MM array. In Reference , the relation between the radiation angle θ and the phase difference Δ ϕ is given as follows:

italicΔϕ = \frac{2 π l \sin θ}{λ_{g}}

where l is the length of the MM array and λ g is the guided wavelength on the MM array, which can be expressed as

λ_{g} = λ_{0} / \sqrt{((), ε_{r} + 1) / 2}

where ε r is the relative permittivity of the Rogers substrate. Subsequently, apply Equation (3) in Equation (4) to obtain the deflection angle as follows:

θ = \sin^{- 1} ([], \frac{(n_{2} - n_{1}) w}{l \sqrt{(ε_{normalr} + 1) / 2}})

…”

Section: Antenna‐loaded MM Structurementioning

confidence: 99%

Planar antenna beam deflection using low‐loss metamaterial for future 5G applications

Esmail

Majid

Dahlan

et al. 2019

Int J RF Microw Comput Aided Eng

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A method to tilt the beam of a planar antenna in the E‐plane is demonstrated by implementing a metamaterial (MM) structure onto the antenna substrate at the fifth‐generation (5G) band of 3.5 GHz. The beam tilting is achieved due to the phase change that occurs when the electromagnetic (EM) wave traverses through two media with different refractive indices. A new adjacent square‐shaped resonator (ASSR) structure is proposed to achieve the beam tilting in a dipole antenna. This structure provides a very low loss of −0.2 dB at 3.17 GHz. The simulation and measurement results illustrate that the radiation beam of the dipole antenna is tilted by +25° and −24° depending on the position of the ASSR array onto the dipole antenna substrate. In addition, no degradation in the gain is observed as in the conventional beam‐tilting methods; in fact, gain enhancement values of 3 dB (positive deflection) and 2.7 dB (negative deflection) are obtained compared with that of a dipole antenna with no ASSR array. The reflection coefficient of the dipole antenna with ASSR array has a good agreement with that of the dipole antenna with no ASSR array. The measured results agree well with the simulated ones.

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“…Spoof SPs could be obtained by constructing periodic metal surfaces to get the characteristics of SPs in the microwave frequencies [22,23]. They have been explored in many antenna applications such as holo-graphic antenna [24,25], metasurface planar lenses [26,27], and metasurface superstrate [28,29]. It has been shown that by loading plasmonic metamaterials, the antenna can be efficiently miniaturized [30].…”

Section: Introductionmentioning

confidence: 99%

Ultrawideband Low-Profile and Miniaturized Spoof Plasmonic Vivaldi Antenna for Base Station

2020

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Stable radiation pattern, high gain, and miniaturization are necessary for the ultra-wideband antennas in the 2G/3G/4G/5G base station applications. Here, an ultrawideband and miniaturized spoof plasmonic antipodal Vivaldi antenna (AVA) is proposed, which is composed of the AVA and the loaded periodic grooves. The designed operating frequency band is from 1.8 GHz to 6 GHz, and the average gain is 7.24 dBi. Furthermore, the measured results show that the radiation patterns of the plasmonic AVA are stable. The measured results are in good agreement with the simulation results.

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Design of Compact Beam-Steering Antennas Using a Metasurface Formed by Uniform Square Rings

Cited by 48 publications

References 29 publications

Design of a PIN Diode-Based Reconfigurable Metasurface Antenna for Beam Switching Applications

Design of a PIN Diode-Based Reconfigurable Metasurface Antenna for Beam Switching Applications

Planar antenna beam deflection using low‐loss metamaterial for future 5G applications

Ultrawideband Low-Profile and Miniaturized Spoof Plasmonic Vivaldi Antenna for Base Station

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