Metasurface Superstrate Beam Steering Antenna with AMC for 5G/WiMAX/WLAN Applications

Verma, Akhilesh; Arya, Ravi Kumar; Raghava, N. S.

doi:10.1007/s11277-022-09993-4

Cited by 13 publications

(3 citation statements)

References 23 publications

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“…. CP [19][20][21][22][23][24] antennas are highly requisite for a rich multipath environment since it diminishes the multipath interferences and are insensitive to antenna orientation between the transmitter and receiver. To attain these dominant characteristics of CP, a parasitic stub is attached to the ofset-fed ETRP radiator (Antenna 1) with a length of 11.75 mm.…”

Section: Circular Polarization Mechanismmentioning

confidence: 99%

Quad Port Multipolarized Reconfigurable MIMO Antenna for Sub 6 GHz Applications

Thangarasu

Palaniswamy

Rao

2023

International Journal of Antennas and Propagation

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Recent reconfigurable technological advancements for wireless communication systems provide various global solutions. This research work presents a quad port multipolarized switchable multiple input multiple output (MIMO) antenna for sub 6 GHz applications. It covers the frequency range from 3.1 to 5.1 GHz, including the 5G NR band n78 (3.3 to 3.8 GHz) and 5G NR band n79 (4.4 to 5 GHz). The proposed antenna comprises four offset-fed monopole antenna elements with an overall dimension of 60 mm × 65 mm. To achieve circular polarization (CP), a parasitic meandering resonator is integrated with antenna elements using four PIN diodes. The polarization diversity is obtained by controlling the bias states of four PIN diodes. The radiating element −1/−3 offers left hand circular polarization (LHCP), while element −2/−4 procures right hand circular polarization (RHCP) when all diodes are ON. Consequently, the proposed antenna provides linear polarization (LP) under reverse bias conditions. Moreover, the designed antenna acquires a wide axial ratio bandwidth (ARBW) of 36.1%. In addition, the developed MIMO antenna exhibits isolation greater than 15 dB using the common ground plane, and the obtained ECC is less than 0.13. The prototype is fabricated, and the simulated responses are in good correlation with the measured results.

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Section: Circular Polarization Mechanismmentioning

confidence: 99%

Quad Port Multipolarized Reconfigurable MIMO Antenna for Sub 6 GHz Applications

Thangarasu

Palaniswamy

Rao

2023

International Journal of Antennas and Propagation

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“…Changing the phase gradient would mean a change in the direction of anomalous reflection or transmission [7][8]. Most of the beam-steering works revolve around designing superstrates above the antenna surface [9][10][11]. 2-D beam-steering by a reconfigurable partial reflecting surface (PRS) has been accomplished by manipulating the states of PIN diodes [12].…”

Section: Introductionmentioning

confidence: 99%

Beam-steering of THz MIMO Antenna using Graphene-based Intelligent Reflective Surface

Das¹

2023

Preprint

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In this work, beam-steering in THz MIMO antennas has been demonstrated using two different types of graphene-based intelligent reflective surface (IRS). Equivalent circuit models of IRS unit cells have been proposed for demonstrating their reflection characteristics. Two types of microstrip patch-based THz MIMO in side-by-side configuration and orthogonal configuration have been designed. Band-stop FSS has been employed to reduce the mutual coupling of MIMO antennas which are arranged in side-by-side configuration. The MIMO antennas have been integrated with graphene-based IRS for simultaneous steering of four beams radiated by the antenna elements. The reflectivity of the IRS relies on the conductivity of graphene which can be modified by changing its bias voltage. A digital 1-bit coded metasurface has been designed using graphene-based intelligent reflective surface (IRS). By varying the bias voltage on the graphene-based unit cells, the pattern of the digital code is modified on the IRS, which causes beam-steering of MIMO antennas placed above it. Gain improvement of 4 dB takes place when the IRS behaves as an AMC for the MIMO in linear configuration. Maximum gain improvement of 9 dB is obtained for the IRS integrated MIMO in orthogonal configuration. Numerical simulations using finite integration technique have been performed for illustrating the rotation of beam in MIMO antennas.

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“…A low-cost 3D-printed metasurface antenna with beam steering capability has been reported in [15]; however, efficiency of the antenna is only 21%. Similarly, in [16] a multilayer beam steering metasurface antenna has been reported, however, design of the antenna is somehow complicated. Additionally, the use of a large number of PIN diodes in certain designs introduces insertion losses and nonlinearities [17], whereas certain structures require complex biasing techniques [18].…”

Section: Introductionmentioning

confidence: 99%

Shape Memory Alloy-Based Fluidically Reconfigurable Metasurfaced Beam Steering Antenna

Shah,

Bernharđsson

et al. 2023

IEEE Access

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A low-cost actuator-based fluidically programmable metasurface (FPMS) antenna is proposed to solve the slow tuning speed problem of the manually fluidic based reconfigurable antennas. The FPMSbased antenna is probe-fed and comprises a 4 × 4 square ring metasurface as a superstrate. Moreover, two shape memory alloy (SMA)-based electrically-controlled actuators are employed in the design for controlling the position of the 3D-printed fluidic channels beneath the metasurface along the axes of the radiating slots of the patch antenna. This results in beam-steering of over ±20˚ in the elevation plane, with a peak gain of 9.1 dBi. It is worth mentioning that compared to conventional electronic tuning technologies where the switches are employed on the top of the radiating aperture of the antenna, which usually deteriorate the antenna performance, the SMA spring actuators do not deteriorate the performance as these are not interacting with the radiating aperture. The proposed antenna was designed and simulated using CST MWS, and the prototype was fabricated and measured. The simulated and measured results are in good agreement, which corroborates the adequacy of the proposed concept. By incorporating the SMA-based fluidic actuators, the proposed antenna is simple and highly efficient as compared to metasurface-based beam-steering antennas reported in the literature thus far.INDEX TERMS Shape memory spring actuators, metasurface, fluidic antennas, beam-steering antenna, fluidically programmable metasurface (FPMS).

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Metasurface Superstrate Beam Steering Antenna with AMC for 5G/WiMAX/WLAN Applications

Cited by 13 publications

References 23 publications

Quad Port Multipolarized Reconfigurable MIMO Antenna for Sub 6 GHz Applications

Quad Port Multipolarized Reconfigurable MIMO Antenna for Sub 6 GHz Applications

Beam-steering of THz MIMO Antenna using Graphene-based Intelligent Reflective Surface

Shape Memory Alloy-Based Fluidically Reconfigurable Metasurfaced Beam Steering Antenna

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