Compact ultrathin linear graded index metasurface lens for beam steering and gain enhancement

Singh, Amit K.; Abegaonkar, Mahesh P.; Koul, Shiban K.

doi:10.1002/mmce.22186

Cited by 3 publications

(2 citation statements)

References 18 publications

(33 reference statements)

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“…Metamaterials employing has been a novel method to realize high performance of the antenna 8–12 . As the two‐dimensional structure, metasurface has been widely used in the antenna design 13–15 . Metasurface‐based patch has been proposed in several antenna designs as it has attractive performance such as low profile, wideband and high gain.…”

Section: Introductionmentioning

confidence: 99%

A low profile wideband pattern reconfigurable metasurface antenna

Cai

Wang

et al. 2021

Int J RF Mic Comp-Aid Eng

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A low profile electrically controlled pattern reconfigurable antenna with wide bandwidth is proposed in this article. The antenna is designed on two closely stacked substrates with a very low profile of 0.04λ0. On the top layer of the design is a periodic metasurface and two parasitic strips, and on the bottom layer is a metallic ground etched with rectangle slot. The feed line is designed on the middle layer to excite the metasurface patch antenna. Eight pin diodes are mounted between the parasitic metallic strips and the adjacent metallic metasurface patch cells for pattern reconfiguration. Two DC biasing voltages are employed to control the pin diodes. By changing the DC voltages, antenna can work at three different modes, and the main beam could be steered among 0°, +25°, and −25° directions. The prototype of the antenna is fabricated and the performance of the prototype is measured. The measured S parameters and radiation pattern show good agreement with the simulated results. The measured overlapped impedance matching bandwidth of the proposed antenna at all working modes is 18.3%. The proposed antenna has the advantages of low profile, high gain, wideband and adjustable main beam.

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Section: Introductionmentioning

confidence: 99%

A low profile wideband pattern reconfigurable metasurface antenna

Cai

Wang

et al. 2021

Int J RF Mic Comp-Aid Eng

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“…To overcome this disadvantage, an artificial magnetic conductor (AMC) 22 is used to reduce the height of air gap. What is more, AMC also improves bandwidth and gain 23‐25 …”

Section: Introductionmentioning

confidence: 99%

An artificial magnetic conductor loaded, polarization reconfigurable circular patch array antenna

Chen

et al. 2021

Int J RF Microw Comput Aided Eng

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A low‐profile polarization reconfigurable circular patch array antenna is presented in this article. It is illustrated that by introducing two reverse arrangement diodes in every concentric ring patch, the direction of current on the surface of the antenna can be switched flexibly, by controlling the operating states of the diodes. Thus, the polarization of the proposed array antenna can be switched in either left hand circularly polarization or right hand circularly polarization. The introductions of artificial magnetic conductor decrease the profile of the proposed antenna. The performances of the proposed antenna were validated by the prototype processing. The measurement results show that the proposed antenna has a 16.3% impedance bandwidth and a 6% 3 dB axial ratio bandwidth. It exhibits a 9.5 dB broadside gain in the CP band. The profile of the proposed antenna is 46.9% lower than the previous design. The measured results are in good agreement with the simulation results. And it has potential applications in S‐band satellite communications.

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EMT Conversion of Composite Broadband Absorbent Metamaterials for Stealth Application Over X-Bands

Duan

Liu

et al. 2020

IEEE Access

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A validating approach for electromagnetic thermal (EMT) conversion of a composite broadband absorbent metamaterials (AMs) is proposed in this paper. The integrated multilayer AMs consisting of top square loop (Q-loops) array layer, middle metal plate-polymer sandwich, bottom Q-loops array layer stacked vertically is analyzed with finite-different time-domain (FDTD) algorithm and fabricated by High Density Interconnector (HDI) process and Micro-electromechanical Systems (MEMS) technology. The implemented composite layered structure with the dielectrics and subsequent multi metal loops has broadband bandwidth over 2.5GHz in X-bands. High absorption performance in various incident waves with different polarizations and incident angles basically maintains a fixed efficient level of the AMs with diverse absorbing states in wide operating band. Electromagnetics and thermal multiphysics analysis validates the EMT conversion of the AMs in induced strong electromagnetic resonance. The integrated thermal conduction device is loaded on the back of AMs to transfer the converted thermal energy in time, which effectively reduces the surface thermal distribution. Finally, absorbent properties tested by free space methods and thermocouple and infrared thermal imaging (ITI) system shows the polarization independent energy transformation in greatly accordance with numerical analysis. This investigation shows the potential application of AMs in stealth systems to achieve both electromagnetic stealth and infrared thermal stealth through EMT energy conversion.INDEX TERMS Broadband, Absorbent metamaterials (AMs), Electromagnetic thermal (EMT) conversion, Stealth, Thermoelectricity.

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Compact ultrathin linear graded index metasurface lens for beam steering and gain enhancement

Cited by 3 publications

References 18 publications

A low profile wideband pattern reconfigurable metasurface antenna

A low profile wideband pattern reconfigurable metasurface antenna

An artificial magnetic conductor loaded, polarization reconfigurable circular patch array antenna

EMT Conversion of Composite Broadband Absorbent Metamaterials for Stealth Application Over X-Bands

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