One LTE LB and two conjoined LTE M/HB MIMO antennas with a compact symmetric frame structure at the short edge of the metal‐framed smartphone

Lin, Song‐En; Barani, Imee Ristika Rahmi; Li, Wei‐Yu

doi:10.1002/mop.31721

Cited by 6 publications

(10 citation statements)

References 22 publications

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“…There are many research articles about antennas for modern mobile phones . The antennas in References are single antenna elements for mobile phones with MFs.…”

Section: Introductionmentioning

confidence: 99%

“…The antennas in References are single antenna elements for mobile phones with MFs. The antennas in References have two or more antenna elements.…”

Section: Introductionmentioning

confidence: 99%

“…The antennas with two elements in References can cover the above eight bands by using the coupled feeding method. The antennas in Reference consists of three antennas, one antenna can cover the band of 824 to 960 MHz, and the other two antennas can cover the band of 1710 to 2690 MHz. The antennas in Reference consist of four antennas by using configurable ways, two antennas can cover the bands of 698 to 960 MHz and 2500 to 2690 MHz, and the other two antennas can cover the band of 1710 to 2500 MHz.…”

Section: Introductionmentioning

confidence: 99%

“…The antennas in References and are the miniaturized antennas applied for MIMO system. Most of the antennas mentioned above are not suitable for an MF environment except the antennas in References . The elements of the antennas in References 12,17, and 21 are located at the two short sides of mobile phones, respectively, while the elements of the antennas in References and are located at the two long sides, respectively.…”

Section: Introductionmentioning

confidence: 99%

“…The elements of the antennas in References 12,17, and 21 are located at the two short sides of mobile phones, respectively, while the elements of the antennas in References and are located at the two long sides, respectively. The three elements of the antennas in Reference are located at the same short side.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Dual antenna system for metal frame mobile phone applications

Huang

Wang

2019

Int J RF Microw Comput Aided Eng

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A dual antenna system with 77 mm × 10 mm × 7.5 mm for metal frame (MF) LTE/GPS mobile phones is proposed and studied. The antenna proposed in this study comprises two antenna elements (Ant 1 and Ant 2) and a decoupling line. Ant 1 as the main antenna that covers the lower band (698‐960 MHz), the GPS band, and the higher band (1710‐2690 MHz) consisting of a ground branch, a coupled line, and a tuning line. Ant 2 as the auxiliary antenna that covers the higher band consisting of a monopole branch and a match circuit. Ant 1 and Ant 2 form a two‐element MIMO antenna covering the higher band. The advantages of the proposed antenna are that the main antenna (Ant 1) covers the GPS band and all of the 2G/3G/4G bands, and the two‐element MIMO antenna covering the higher band, which consists of Ant 1 and Ant 2 located at the same side of a mobile phone with an MF, is obtained. A prototype is manufactured and tested. For Ant 1, the measured working bands (under −6 dB condition) are 685 to 965 MHz and 1480 to 2800 MHz, and the LTE700, GSM850, GSM900, GPS, GSM1800, GSM1900, UMTS, LTE2300, and LTE2500 bands are covered. For Ant 2, the measured working band (under −6 dB condition) is 1640 to 2720 MHz, and the GSM1800, GSM1900, UMTS, LTE2300, and LTE2500 bands are covered. The measured isolations between Ant 1 and Ant 2 are larger than 12 dB at the working bands. The measured efficiencies, envelope correlation coefficients, and mean effective gains are also presented.

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“…There are many research articles about antennas for modern mobile phones . The antennas in References are single antenna elements for mobile phones with MFs.…”

Section: Introductionmentioning

confidence: 99%

“…The antennas in References are single antenna elements for mobile phones with MFs. The antennas in References have two or more antenna elements.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Dual antenna system for metal frame mobile phone applications

Huang

Wang

2019

Int J RF Microw Comput Aided Eng

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Multiantennas conjoined with metal frame and integrated into 8 × 8 m ultiple‐input and m ultiple‐output array for fifth generation smartphone applications

Liao¹,

Huang

2020

Int J RF Microw Comput Aided Eng

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A new multiple-input and multiple-output (MIMO) antenna conjoined with a metal case and metal frame in mobile phones for fifth generation mobile network applications is presented. The main antenna is the metal frame inverted-F antenna (IFA) with a high-pass circuit (HPC) on the short side of the phone (Ant. 1); then, the system ground extending path and coupling are used to create a semi-slot antenna (Ant. 2). The metal frame radiating monopole antenna (Ant. 3) uses a low-pass circuit, and the IFA antennas (Ant. 4) with HPCs are placed in a clear space only 1-mm wide on the long side of the phone. To improve the isolation of the multiple antennas, the configuration of the MIMO antenna integration was investigated. The proposed four-or eight-MIMO array was comprehensively evaluated in the desired band. The characteristics of individual antennas were used to achieve pattern diversity, and they demonstrated good performance in channel capacity evaluation: 19.4 bps/Hz (four-antenna MIMO) and 38.6 bps/Hz (eight-antenna MIMO).

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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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One LTE LB and two conjoined LTE M/HB MIMO antennas with a compact symmetric frame structure at the short edge of the metal‐framed smartphone

Cited by 6 publications

References 22 publications

Dual antenna system for metal frame mobile phone applications

Dual antenna system for metal frame mobile phone applications

Multiantennas conjoined with metal frame and integrated into 8 × 8 m ultiple‐input and m ultiple‐output array for fifth generation smartphone applications

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

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