A Wideband Transmitarray Using Triple-Layer Elements Combined With Cross Slots and Double Square Rings

Tian, Chao; Jiao, Yong‐Chang; Zhao, Gang; Wang, Hao

doi:10.1109/lawp.2017.2651027

Cited by 95 publications

(29 citation statements)

References 12 publications

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“…Since the transmitarray antenna is based on the element which provides three phase states as discussed above, after calculating the theoretical compensation phase of each element using equations (1) and (2) for a main beam at direction ( , ), the real phase ( , ) of the element at the position with the coordinates , on the transmitarray is quantized using equation (3). This corresponds to the three phase states:…”

Section: Transmitarray Designmentioning

confidence: 99%

“…A transmitarray, as shown in Figure 1(c), overcomes the disadvantage of reflectarray which is the feed blockage phenomenon due to the fact that the feed source of transmitarray is located in the opposite side of the radiated wave. Recent transmitarray designs are mainly based on multilayer frequency selective surfaces (M-FSS) [1][2][3][4][5]. A typical transmitarray using M-FSS structure composes of multiple microstrip arrays of antenna elements and a feed source.…”

Section: Introductionmentioning

confidence: 99%

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Three Phase Resolution Transmitarray Element for Electronically Reconfigurable Transmitarrays

Thiện¹,

Minh²,

Dương³

2019

MIC ICT Research Journal

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Electrical beam scanning is a feature enabling an antenna array to electrically control its main beam toward a desired direction. In this paper, a three-phase state element for electronically reconfigurable transmitarrays is presented. The element is made up of C-patches and modified ring slots loaded rectangular gaps. By controlling the bias state of four p-i-n diodes, three phase states are obtained. The dimension of the element is optimized by using full-wave EM simulation and performance of the element is validated by both simulation and an experimental waveguide system. A transmitarrayconsistingof12×12elementshasbeensimulated to validate the steering capabilities. Experimental results indicate the element has good characteristics and excellent phase change capabilities.

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Section: Transmitarray Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Three Phase Resolution Transmitarray Element for Electronically Reconfigurable Transmitarrays

Thiện¹,

Minh²,

Dương³

2019

MIC ICT Research Journal

View full text Add to dashboard Cite

show abstract

“…Despite its attractive features, one critical issue associated with transmitarray is the inherent narrow bandwidth. A number of different designs based on the two most popular approaches, i.e., the multilayer-frequency selective surface (M-FSS) approach [4], [5], [17]- [20] and the receive/transmit approach [6], [7], [9], have been carried out to extend the The associate editor coordinating the review of this manuscript and approving it for publication was Mohammad Zia Ur Rahman . bandwidth of transmitarray.…”

Section: Introductionmentioning

confidence: 99%

A Wideband Low-Profile Efficiency-Improved Transmitarray Antenna With Over-1-bit Phase-Shifting Elements

Wang

Luk

et al. 2020

IEEE Access

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This paper describes a wideband, low-profile and efficiency-improved transmitarray antenna achieved by employing over-1-bit phase-shifting elements and incorporating optimized phase compensation scheme. Firstly, a wideband ultrathin 1-bit phase-shifting unit cell is presented based on the polarization twisting feature of the twisted stacking aperture structure. A minor variation in unit-cell geometry is then introduced to add more degrees of freedom in phase adjustment while maintaining nearly same low insertion loss within a wide frequency range. Moreover, the resultant performances of transmitarrays using different phase compensation schemes are compared. An optimized scheme that has a minimized average phase error and effectively enhances the aperture efficiency is adopted. Results of a 21.5% 1-dB gain bandwidth, 0.127-λ 0 aperture thickness and 40% aperture efficiency are observed from the fabricated 14 × 14 transmitarray antenna. INDEX TERMS Flat lens antenna, low profile, thin aperture, transmitarray antenna, wide gain bandwidth.

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“…Many researchers have made efforts to improve the bandwidth performance of TA antennas. Using multilayer frequency-selective surface unit cells is a typical approach [1,2,3,4,5,6,7,8,9,10,11,12]. In [1], a four-layer TA without dielectric substrate by using cross-slot unit cells is presented.…”

Section: Introductionmentioning

confidence: 99%

A wideband transmitarray using triple-layer elements with reduced profile

Han

Jian

et al. 2020

IEICE Electron. Express

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A triple-layer wideband transmitarray (TA) which works at 18.5 GHz with reduced profile is presented in this paper. The unit cell composed of three metal layers, each layer is etched on the corresponding dielectric substrate. The top layer consists of double square rings, the same as the bottom layer. The intermediate layer consists of a Jerusalem cross slot. The thickness of designed unit cell is 0.15λ, where λ is the wavelength in free-space. A large frequency range is implemented by parallel sets of phase curves generated by proposed unit cell. The magnitude of transmission coefficient is less than 1 dB and the phase shift range exceeds 360 degree across the entire frequency range. We design, fabricate and measure a TA operating at 18.5 GHz to show the validation of this paper. Through the measurement, we can obtain that the 1-dB gain bandwidth is 14.8% (17.5-20.3 GHz), and maximum gain is 22.5 dB at 18.5 GHz. The proposed transmitarray's maximum aperture efficiency is 46%.

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A Wideband Transmitarray Using Triple-Layer Elements Combined With Cross Slots and Double Square Rings

Cited by 95 publications

References 12 publications

Three Phase Resolution Transmitarray Element for Electronically Reconfigurable Transmitarrays

Three Phase Resolution Transmitarray Element for Electronically Reconfigurable Transmitarrays

A Wideband Low-Profile Efficiency-Improved Transmitarray Antenna With Over-1-bit Phase-Shifting Elements

A wideband transmitarray using triple-layer elements with reduced profile

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