Amplitude and Phase Independently Adjustable Transmitarray Aperture and Its Applications to High Gain and Low Sidelobe Antenna

Yin, Liyuan; Jin, Cheng; Lv, Qihao; Zhang, Binchao; Cao, Kaiqi; Zhang, Pengyu; Xue, Zhenghui

doi:10.1109/tap.2022.3140498

Cited by 15 publications

(5 citation statements)

References 27 publications

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“…Both sides of the dielectric substrate have metal attached to them and are separated by an air layer. The four metal layers used are identical, and this configuration requires fewer variables to be optimised compared to a structure with three metal layers but different geometries [29,30]. This section investigates the effect of dielectric substrate thickness and air layer thickness on unit cell transmission performance and selects the optimum parameters.…”

Section: Planar Transmitarray Unit Cell Designmentioning

confidence: 99%

Near-field focused planar transmitarray with low profile design for microwave power transmission

Xiao

Fan

et al. 2023

IEICE Electron. Express

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This paper proposes a near-field focused (NFF) planar transmitarray with low profile operating in the C-band. A frequency selective surface (FSS) unit cell with a profile of only 0.15λ is designed by combining generalised scattering theory with full-wave simulations. To achieve better focusing, the transmission phase of the central unit cell of the transmitarray is adjusted to 90°. The focusing relative bandwidth is 13.7% at a centre frequency of 5.8 GHz, which enables a good focusing effect to be achieved. Meanwhile, this paper evaluates the microwave power received at the receiver when the proposed transmitarray used in MPT system. The measured results show that loading the proposed transmitarray can improve the received power up to 510%. Futhermore, in the range of 220~660mm from the transmitarray, the received power can be increased to more than 300%.

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Section: Planar Transmitarray Unit Cell Designmentioning

confidence: 99%

Near-field focused planar transmitarray with low profile design for microwave power transmission

Xiao

Fan

et al. 2023

IEICE Electron. Express

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“…[21] introduces a polarization conversion with excellent roll-off features, an ultra-thin thickness, low insertion losses, and wide rejection bands. By designing a transmission structure based on polarization conversion and amplitude, a phase-independent adjustable transmitarray is realized [22], which has the characteristics of a low profile and low cost. A novel transmitarray structure is proposed in [23] that achieves line polarization to cross polarization through orthogonal polarization gates and a middle rectangular gap, and can achieve 2D beam scanning.…”

Section: Introductionmentioning

confidence: 99%

A New 1 Bit Electronically Reconfigurable Transmitarray

Zheng,

Ren,

et al. 2024

Electronics

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This article proposes a novel 1 bit electronically reconfigurable transmitarray, designed to facilitate digital two-dimensional beam scanning, boasting both high gain and a slim profile. The fundamental phase shifting unit of the transmitarray unit cell consists of a resonant cavity composed of a pair of orthogonal metal gates and dielectric layers, with a cross-sectional height of 0.17 λ. The middle layer of the phase-shifting unit is composed of circular gaps and C-shaped patches, and two diodes with opposite directions are loaded. By turning the diodes ON and OFF, current reversal is accomplished, allowing the unit to transition between its 0 and 1 states and achieve transmission-phase quantization. The unit’s minimal insertion loss is 0.37 dB in state 0 and 0.35 dB in state 1, respectively. In order to verify our design, we designed and processed a 16 × 16 transmitarray in the C-band. The simulated results are consistent with the experimental results. The experimental results show that the transmitarray can achieve ± 45° beam scanning on both the E-plane and H-plane, and the maximum gain is 20.59 dBi at 5 GHz, with an aperture efficiency of 20.5%.

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“…Therefore, the self-powered system is proposed to solve the energy supply problem [1,2,3,4,5,6,7,8]. RF (Radio Frequency) energy harvesting technology is less restricted by the space and environment, which has significant applications in military and civil engineering, such as space solar power plants, wireless sensor networks, implantable medical devices, smart wearable devices, and aerial charging of drones [9,10,11,12,13,14,15,16,17,18].…”

Section: Introductionmentioning

confidence: 99%

High-efficiency rectifying circuit for 5.8GHz wireless RF energy harvesting applications

Huang,

Liang,

Wang

et al. 2024

IEICE Electron. Express

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A high efficiency rectifying circuit with multi-section impedance conversion and harmonic suppression is proposed. A shorted stub is used to compensate the rectifying diode capacitive impedance. Furthermore, a matching filter network is integrated at the DC output port to eliminate the fundamental and high order harmonics which are generated by the diode nonlinearity. The above efforts could effectively improve the conversion efficiency of rectifying circuit. A wireless RF power transmission experiment is implemented, the output voltage is 2.003 V with the distance between the transmitting and receiving antenna is 1 m. The output voltage is linear with the transmission distance, and the maximum output voltage can reach 3.17 V. Experimental results show that the proposed rectifying circuit achieves high rectifying efficiency of 59.6% at 5.8 GHz.

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Amplitude and Phase Independently Adjustable Transmitarray Aperture and Its Applications to High Gain and Low Sidelobe Antenna

Cited by 15 publications

References 27 publications

Near-field focused planar transmitarray with low profile design for microwave power transmission

Near-field focused planar transmitarray with low profile design for microwave power transmission

A New 1 Bit Electronically Reconfigurable Transmitarray

High-efficiency rectifying circuit for 5.8GHz wireless RF energy harvesting applications

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