77-GHz Dual-Layer Transmit-Array for Automotive Radar Applications

Yeap, Siew Bee; Qing, Xianming; Chen, Zhi Ning

doi:10.1109/tap.2015.2419691

Cited by 95 publications

(16 citation statements)

References 16 publications

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“…The operation of the lens was conceptually similar to the one of transmit arrays [31][32][33][34]. The phase delay experienced by a wave propagating through the lens was controlled throughout the aperture.…”

Section: Lens Design Using Csrrsmentioning

confidence: 99%

Fully Metallic Flat Lens Based on Locally Twist-Symmetric Array of Complementary Split-Ring Resonators

Dahlberg

Valerio²,

Quevedo–Teruel

2019

Symmetry

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In this article, we demonstrate how twist symmetries can be employed in the design of flat lenses. A lens design is proposed, consisting of 13 perforated metallic sheets separated by an air gap. The perforation in the metal is a two-dimensional array of complementary split-ring resonators. In this specific design, the twist symmetry is local, as it is only applied to the unit cell of the array. Moreover, the twist symmetry is an approximation, as it is only applied to part of the unit cell. First, we demonstrate that, by varying the order of twist symmetry, the phase delay experienced by a wave propagating through the array can be accurately controlled. Secondly, a lens is designed by tailoring the unit cells throughout the aperture of the lens in order to obtain the desired phase delay. Simulation and measurement results demonstrate that the lens successfully transforms a spherical wave emanating from the focal point into a plane wave at the opposite side of the lens. The demonstrated concepts find application in future wireless communication networks where fully-metallic directive antennas are desired.

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Section: Lens Design Using Csrrsmentioning

confidence: 99%

Fully Metallic Flat Lens Based on Locally Twist-Symmetric Array of Complementary Split-Ring Resonators

Dahlberg

Valerio²,

Quevedo–Teruel

2019

Symmetry

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“…In case of 3‐D steering, the steering angle has a limitation, resulting in the narrow scanning angle. Also, beam steering transmitarray antennas using the switched source have been published recently . However, the steering angle of the transmitarray antennas is discretized, because the antennas use switched single source.…”

Section: Introductionmentioning

confidence: 99%

“…Also, beam steering transmitarray antennas using the switched source have been published recently. [18][19][20] However, the steering angle of the transmitarray antennas is discretized, because the antennas use switched single source.…”

Section: Introductionmentioning

confidence: 99%

Beam pattern reconfigurable circularly polarized transmitarray antenna by rearrangement of sources

Lee

Kwon

Lee

2019

Micro & Optical Tech Letters

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A novel method for a beam pattern reconfigurable circularly polarized (CP) transmitarray antenna based on passive metasurface is proposed by a rearrangement of source antennas. Two source antennas among eight source antennas are selected for the fine beam steering. The beam steering angle can be finely controlled by the positions and phase difference of the source. Moreover, this kind of transmitarray antenna can be utilized to generate multibeam by the combination of the source antennas for radiation to different directions. To verify its feasibility, the planar CP source antenna is designed to operate at 5.8 GHz. Also, the metasurface consists of four layer separated by four substrates to cover full transmission phase variation of 2π, and the metallic layers are designed to circular patches. As a result, the steering angle is experimentally observed at each 0, +20, and +40°, and dual beam radiating to −30 and +30° also is measured.

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“…Other proposed structures, which are operating based on leaky wave principles [7] and Fabry-Perot resonators [8], are intrinsically narrow band. Spatial beam-forming techniques such as reflect array (RA) [9,10] and transmit array (TA) antennas [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29] with their high efficiency and broadband performances are promising approaches for mm-wave frequencies. Compared to centre-fed RA antennas, TA antennas do not suffer from feed blockage and they are less sensitive to the surface errors.…”

Section: Introductionmentioning

confidence: 99%

“…However, their results show a poor antenna aperture efficiency. An alternative approach of phase-shifting principle is based on the quantised-phase receive/transmit elements concept proposed in [21][22][23][24][25][26][27][28]. Specifically, a 60 GHz TA antenna has been demonstrated in [23], in which the receive/transmit antennas of each element are connected through a via.…”

Section: Introductionmentioning

confidence: 99%

Design and analysis of a millimetre‐wave high gain antenna

Erfani

Safavi‐Naeini²,

Tatu

2019

IET Microwaves, Antennas & Propagation

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A broadband and high gain transmit array (TA) antenna, operating at 60 GHz, is proposed. To meet the design requirements of a TA antenna with polarisation‐insensitive radiation performance, an optimal multi‐layer unit cell (UC) is introduced. The dimensions of the UC are parametrically expressed to realise a linear transmission phase response with a variation range of 270° and insertion loss <−3 dB over the desired frequency band ranging from 58 to 64 GHz. A new planar array composed of 2 × 4 aperture‐coupled‐patches interleaved with a soft‐surface is also designed as a feed for the proposed TA. Furthermore, a hybrid method based on full‐wave simulations and analytical formulations is developed to calculate the radiation characteristics of the TA antenna and the results are compared to the ones achieved with full‐wave simulations. The designed TA antenna is fabricated and the measurement results are presented. The obtained results show peak aperture efficiencies of 38.48% (30.85 dB peak gain) and 32.37% (30.1 dB peak gain), and −1 dB gain bandwidths of 7.7 and 8.2% from the full‐wave simulations and measurements, respectively. Such a broadband and high gain antenna is deemed to be suitable for mm‐wave backhaul links in 5G cellular systems.

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77-GHz Dual-Layer Transmit-Array for Automotive Radar Applications

Cited by 95 publications

References 16 publications

Fully Metallic Flat Lens Based on Locally Twist-Symmetric Array of Complementary Split-Ring Resonators

Fully Metallic Flat Lens Based on Locally Twist-Symmetric Array of Complementary Split-Ring Resonators

Beam pattern reconfigurable circularly polarized transmitarray antenna by rearrangement of sources

Design and analysis of a millimetre‐wave high gain antenna

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