Design of mm-wave Reconfigurable holographic antenna based on liquid crystal material

Zhang, Weiyi; Yang, Weiyi; Jiang, Di; Hu, Wei; Pan, Pengbo

doi:10.1109/cama56352.2022.10002535

Cited by 4 publications

(2 citation statements)

References 16 publications

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“…Weiyi Zhang proposed an LC substrate integrated waveguide leakage antenna based on holographic theory, operating at 35 GHz. This design achieved a beam scanning range from −45° to 51°, with a maximum gain exceeding 9 dBi and a reflection coefficient below −10 dB [ 44 ]. A microstrip line leakage antenna based on the etched complementary open resonant ring of LC materials is proposed in [ 45 ].…”

Section: Introductionmentioning

confidence: 99%

MCML-BF: A Metal-Column Embedded Microstrip Line Transmission Structure with Bias Feeders for Beam-Scanning Leakage Antenna Design

Hou,

Fang,

Fan

et al. 2024

Sensors

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This article proposes a novel fixed-frequency beam scanning leakage antenna based on a liquid crystal metamaterial (LCM) and adopting a metal column embedded microstrip line (MCML) transmission structure. Based on the microstrip line (ML) transmission structure, it was observed that by adding two rows of metal columns in the dielectric substrate, electromagnetic waves can be more effectively transmitted to reduce dissipation, and attenuation loss can be lowered to improve energy radiation efficiency. This antenna couples TEM mode electromagnetic waves into free space by periodically arranging 72 complementary split ring resonators (CSRRs). The LC layer is encapsulated in the transmission medium between the ML and the metal grounding plate. The simulation results show that the antenna can achieve a 106° continuous beam turning from reverse −52° to forward 54° at a frequency of 38 GHz with the holographic principle. In practical applications, beam scanning is achieved by applying a DC bias voltage to the LC layer to adjust the LC dielectric constant. We designed a sector-blocking bias feeder structure to minimize the impact of RF signals on the DC source and avoid the effect of DC bias on antenna radiation. Further comparative experiments revealed that the bias feeder can significantly diminish the influence between the two sources, thereby reducing the impact of bias voltage introduced by LC layer feeding on antenna performance. Compared with existing approaches, the antenna array simultaneously combines the advantages of high frequency band, high gain, wide beam scanning range, and low loss.

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Section: Introductionmentioning

confidence: 99%

MCML-BF: A Metal-Column Embedded Microstrip Line Transmission Structure with Bias Feeders for Beam-Scanning Leakage Antenna Design

Hou,

Fang,

Fan

et al. 2024

Sensors

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show abstract

“…Operating at 1.0864 THz, it offers a wave velocity scanning range of 20° while maintaining an almost constant 10°beamwidth. Weiyi Zhang proposed an LC substrate integrated waveguide leaky-wave antenna based on holographic theory [34]. It achieves a beam scanning range of -45° to +51° at 35 GHz, with a maximum gain of 9.8 dB and a reflection coefficient below -10 dB.…”

Section: Introductionmentioning

confidence: 99%

A Ka-band Holographic Metasurface Leaky-wave Antenna Based on Liquid Crystal

Hou,

Fang,

Wang

et al. 2023

Preprint

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Beam-scanning holographic hypersurface leaky-wave antennas have been a focus of attention for many scholars in recent years, and numerous related results have been obtained. However, these antennas suffer from several issues such as small beam-scanning range, low gain, and unsatisfactory impedance matching. To address these problems, this paper proposes a microstrip line (ML) antenna unit based on liquid crystal (LC) materials etched Complementary Split Ring Resonator (CSRR). In a first-of-its-kind approach, the substrate integrated waveguide (SIW) structure and the ML transmission structure are combined to present the SIW-ML transmission structure. The antenna operates in the Ka-band with excellent resonance characteristics at 34.7 GHz, and the S11 parameters are below − 13 dB in the frequency range of 30–40 GHz, indicating outstanding impedance matching. By arranging 56 antenna units, a periodic leaky-wave antenna is created, enabling fixed-frequency beam-scanning at 34.7 GHz. Experimental results show that the antenna can achieve scanning of angles between − 53° and + 60° with a gain of up to 12.63 dB. Once single-beam scanning is achieved, a method combining LC and discrete amplitude weighting technique, as well as multi-beam theory, is proposed for multi-beam study. Experimental results reveal that the designed 56-unit beam-scanning antenna can effectively realize beam scanning in two directions.

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A Ka-band one-dimensional beam scanning leaky-wave antenna based on liquid crystal

Hou,

Fang,

Wang

et al. 2024

Sci Rep

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Fixed frequency beam-scanning leaky-wave antennas have been a focus of attention for many scholars in recent years, and numerous related results have been obtained. However, these antennas suffer from several issues such as small beam-scanning range, low gain, and unsatisfactory impedance matching. To address these problems, this paper proposes a microstrip line (ML) antenna unit based on liquid crystal (LC) materials etched Complementary Split Ring Resonator (CSRR). In a first-of-its-kind approach, the substrate integrated waveguide (SIW) structure and the ML transmission structure are combined to present the SIW-ML transmission structure. The antenna operates in the Ka-band with excellent resonance characteristics at 34.7 GHz, and the S11 parameters are below − 13 dB in the frequency range of 30–40 GHz, indicating outstanding impedance matching. By arranging 56 antenna units, a periodic leaky-wave antenna is created, enabling fixed-frequency beam-scanning at 34.7 GHz. Experimental results show that the antenna can achieve scanning of angles between − 53° and + 60° with a gain of up to 12.63 dB. Once single-beam scanning is achieved, a method combining LC and discrete amplitude weighting technique, as well as multi-beam theory, is proposed for multi-beam study. Experimental results reveal that the designed 56-unit beam-scanning antenna can effectively realize beam scanning in two directions.

show abstract

Design of mm-wave Reconfigurable holographic antenna based on liquid crystal material

Cited by 4 publications

References 16 publications

MCML-BF: A Metal-Column Embedded Microstrip Line Transmission Structure with Bias Feeders for Beam-Scanning Leakage Antenna Design

MCML-BF: A Metal-Column Embedded Microstrip Line Transmission Structure with Bias Feeders for Beam-Scanning Leakage Antenna Design

A Ka-band Holographic Metasurface Leaky-wave Antenna Based on Liquid Crystal

A Ka-band one-dimensional beam scanning leaky-wave antenna based on liquid crystal

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