Reconfigurable Structure Reutilization Low-SAR MIMO Antenna for 4G/5G Full-Screen Metal-Frame Smartphone Operation

Fang, Yixiang; Liu, Ying; Jia, Yongtao; Liang, Junjie; Zhang, Huan‐Huan

doi:10.1109/lawp.2023.3236782

Cited by 10 publications

(17 citation statements)

References 22 publications

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“…MHz-3800 MHz (with a 50.4 mm spacing between the antennas)[15], and the radiation efficiency was reported to range from 36% to 58% at 4800 MHz-5000 MHz (with a 21 mm spacing between the antennas)[14]. It is important to note that metal frames can have an impact on radiation efficiency due to their ability to reflect, absorb, or scatter RF energy, resulting in radiation loss or non-uniform radiation patterns.…”

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confidence: 99%

Compact Sub 6 GHz Dual Band Twelve-Element MIMO Antenna for 5G Metal-Rimmed Smartphone Applications

et al. 2023

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In this paper, a twelve-antenna system is designed for 5G smartphones with metal frames. The system is compact and operates on dual bands within the sub-6 GHz frequency range using multiple-input multiple-output (MIMO) technology. Two sets of six-antenna units are included in the system, arranged in a diagonal mirror-image configuration, and positioned at the center of the circuit board’s longer edges. The profile height of each of the six-antenna units is only 3 mm, and the overall array dimensions are 105 × 3 × 3.1 mm3. A single antenna unit is 15 × 3 × 3.1 mm3 (0.173 λ × 0.035 λ × 0.036 λ, where λ equals the free-space wavelength of 3450 MHz). The arrangement of the antennas in the six-antenna units is parallel, with a 3 mm separation between adjacent antennas. The antenna structure comprises of an inverted L-shaped feed branch and two inverted L-shaped short-circuit branches integrated into part of the metal frame. The proposed array can form multiple resonance paths, achieving dual-band operation at 3300–3600 MHz and 4800–5000 MHz. The measured isolation of this twelve-antenna system within the operating frequency band is over 10 dB, and the measured antenna efficiency is greater than 36%. Therefore, the system is suitable for use in smartphones with high screen-to-body ratios and metal frames.

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confidence: 99%

Compact Sub 6 GHz Dual Band Twelve-Element MIMO Antenna for 5G Metal-Rimmed Smartphone Applications

et al. 2023

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“…The connected array supports for 5G band (23–29 GHz) and the varactor diode connected to the slot antenna supports 4G applications (2.05–2.7 GHz). The matching circuits are used with the loop antenna for achieving 4G and 5G bands simultaneously (Fang et al., 2023). This structure is tested on the smartphone mockup plane and the SAR performance of the MIMO antennas are also analyzed.…”

Section: Applications Of Reconfigurable Antennasmentioning

confidence: 99%

Reconfigurable Antennas and Their Practical Applications—A Review

Subbaraj,

Thomas

2023

Radio Science

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This paper presents the review on the design of various reconfigurable antennas and their applications in the current scenario. There are more challenges involved in the design of these antennas. This paper also describes the various methods used for reconfiguring the frequency bands. The single parameter reconfiguration and hybrid reconfiguration examples are analyzed with their performances. The parameters such as gain, efficiency, and size of the existing antenna is compared. The various switches deployed in the antenna for achieving the reconfiguration are presented in this paper. The switches such as pin diodes, varactor diodes, MEMS, and mechanical switching are also elaborated with their corresponding merits and demerits. The diodes are switched on and off to activate and deactivate the structure of the antenna. Similarly, mechanical actuators are used for mechanical switching mechanism. The polarization reconfiguration mechanism between linear and circular; pattern reconfiguration mechanism between directional and omnidirectional are reviewed with various examples. In addition to that, several designs of reconfigurable filtering antennas, MIMO antennas are also reviewed in detail.

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“…As a result, the development of small and low‐profile antennas for mobile devices is always ongoing, and those designed to cover the 4G and 5G bands can be found in Refs. [2–24].…”

Section: Introductionmentioning

confidence: 99%

“…Nevertheless, they require a certain profile height that many antennas are incorporated matching circuit designs to achieve antenna shrinkage [2][3][4][5][6]. With the demand for large screens with high display-to-body ratios, metal back covers or metal bezels, there are antenna designs with integrated metal bezels and metal ground plane perimeters [8][9][10][11][12][13][14][15][16][17].…”

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confidence: 99%

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Application of switchable 4G/5G dual antenna system for laptops

Cheng,

Chen,

et al. 2023

IET Microwaves Antenna & Prop

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This work investigates a switchable 4G/5G dual‐antenna system designed for laptops. The dual open‐slot antenna structure is straightforward, with a slot width of only 2 mm. Each individual antenna features two different feed sections located in two separate regions between the slots. Port 1 is a direct‐feeding design with 3.6 pF chip capacitance, while Port 2 is only a direct‐feeding design. When Port 1 is excited and Port 2 is terminated to 50‐Ω, the antenna is functional in long‐term evolution (LTE) low‐band (617–960 MHz) and 5G sub‐6 GHz band (3300–5000 MHz). On the other hand, when Port 2 is excited and Port 1 is terminated to 50‐Ω, the antenna is functional in the LTE medium/high bands between 1710 and 2690 MHz. The measured isolation consistently exceeded 30 dB, and the efficiency remained above 48% across the entire frequency range. The calculated envelope correlation coefficients derived from the complex E‐field radiation pattern measurements were consistently below 0.02. These findings indicate that the system is exceptionally well‐suited for applications characterised by integrated metallic environments and a high display‐to‐body ratio.

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Reconfigurable Structure Reutilization Low-SAR MIMO Antenna for 4G/5G Full-Screen Metal-Frame Smartphone Operation

Cited by 10 publications

References 22 publications

Compact Sub 6 GHz Dual Band Twelve-Element MIMO Antenna for 5G Metal-Rimmed Smartphone Applications

Compact Sub 6 GHz Dual Band Twelve-Element MIMO Antenna for 5G Metal-Rimmed Smartphone Applications

Reconfigurable Antennas and Their Practical Applications—A Review

Application of switchable 4G/5G dual antenna system for laptops

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