A High-Gain Broadband Gradient Refractive Index Metasurface Lens Antenna

Erfani, Elham; Niroo-Jazi, Mahmoud; Tatu, Serioja Ovidiu

doi:10.1109/tap.2016.2526052

Cited by 136 publications

(50 citation statements)

References 21 publications

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“…So, a (4-8) GHz operating frequency range can be obtained according to (6). This result coincides well with the simulation results.…”

Section: T E Kz T E Kz T E Kz T E Kzsupporting

confidence: 88%

“…The manipulation of the electromagnetic wave by the metamaterials normally aims at the control of its amplitude [3][4][5][6], phase [7][8][9][10][11] and polarization [12][13][14][15][16][17][18][19][20][21][22]. According to the propagation direction of electromagnetic waves, polarization-manipulating metamaterials consist of reflective and transmitting types.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Broadband Transmission Metasurface with Polarization-Transforming Functionality

Chen¹,

Gao²,

Cao³

et al. 2017

RADIOENGINEERING

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“…So, a (4-8) GHz operating frequency range can be obtained according to (6). This result coincides well with the simulation results.…”

Section: T E Kz T E Kz T E Kz T E Kzsupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

A Broadband Transmission Metasurface with Polarization-Transforming Functionality

Chen¹,

Gao²,

Cao³

et al. 2017

RADIOENGINEERING

View full text Add to dashboard Cite

“…Larger aperture efficiency is achieved by the arrangement of the GRIN lens. The radiation efficiency of the GRIN lens antenna (

e_{rad}

) calculated by the proportion of antenna realized gain ( G ) and directivity ( D ),

e_{rad} = G / D

, which is varying approximately 85%‐90% over the operating frequency band. The measured radiation efficiency is varying approximately between 70% and 75% over the frequency band 3–10 GHz, indicating that the low radiation losses achieved by the lens.…”

Section: Resultsmentioning

confidence: 99%

Gain enhancement of the ultra-wideband tapered slot antenna using broadband gradient refractive index metamaterial

Singha

Vakula

2017

Int J RF Microw Comput Aided Eng

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In this article, a broadband gradient refractive index (GRIN) metamaterial is designed and used to enhance the gain of the tapered slot antenna (TSA). The proposed GRIN is implemented using nonresonant parallel‐line unit cell with different refractive index values. GRIN lens are placed in front of the tapered slot direction in the direction of x‐axis. The designed GRIN metamaterials have broad bandwidth (2‐12 GHz) characteristics due to the nonresonant parallel‐line elements which is suitable for the ultra‐wideband frequency band. The measurement results indicates that the radiated beam becomes more directive with narrow beam width. The measured reflection coefficient is below −10 dB over the frequency bandwidth of 3‐11 GHz. The peak gain of TSA is obtained up to 14 dB at 10 GHz using GRIN lens.

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“…Beam tilting of antenna is achieved by using MS at various frequencies with complicated dimensions in References . The modulated MS with complex dimensions is used in References to improve the radiation pattern of antenna. Frequency and beam scanning transmissive gradient phase MS is presented for antenna applications in References .…”

Section: Introductionmentioning

confidence: 99%

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

Singh

Abegaonkar

Koul

2020

Int J RF Microw Comput Aided Eng

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In this article, designing of a low-profile planar linear graded index metasurface (LGIMS) lens is presented. A wide-beam steerable high-gain low-profile antenna is designed by placing LGIMS over microstrip patch antenna radiator at an optimum height. Direction control of the radiation pattern of the microwave radiator by using amplitude and phase modulated metasurface is achieved. The measured peak gain of 13.50 dBi at an operating frequency of 10.08 GHz with progressively beam steering characteristic and progressive enhanced gain within a large conical region of apex angle 64 . The measured maximum gain tolerance of 2.43 dB with significantly reduced side lobe level is obtained by mechanically moving the ultrathin LGIMS lens along the negative parallel radiator axis. The mechanical movement of LGIMS lens over radiator results in to beam steering up to +32 . A maximum measured gain enhancement of 8.75 dB is achieved. The positive parallel radiator axis movement of LGIMS causes gradual broadside gain enhancement with maximum gain enhancement of 1.5 dB. The measured results are in good agreement with the simulated results. K E Y W O R D Sbeam steering, graded index metasurface, high gain patch antenna, lens antenna, metamaterial, modulated metasurface, phase correcting surface

show abstract

A High-Gain Broadband Gradient Refractive Index Metasurface Lens Antenna

Cited by 136 publications

References 21 publications

A Broadband Transmission Metasurface with Polarization-Transforming Functionality

A Broadband Transmission Metasurface with Polarization-Transforming Functionality

Gain enhancement of the ultra-wideband tapered slot antenna using broadband gradient refractive index metamaterial

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

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