A Dual-Loop Antenna Design for Hepta-Band WWAN/LTE Metal-Rimmed Smartphone Applications

Ban, Yong‐Ling; Qiang, Yun-Fei; Chen, Zhi; Kang, Kai; Guo, Jinhong

doi:10.1109/tap.2014.2368573

Cited by 145 publications

(116 citation statements)

References 28 publications

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“…CCEs are widely used at cellular frequencies due to their wide frequency band and robust performance. Slot antennas are appropriate for sides of the phone with only narrow 2.5 mm clearance for antennas [1,3]. Each antenna has additional matching circuit to adjust the resonances to desired frequency bands and to enhance performance.…”

Section: Design Framework and Principlesmentioning

confidence: 99%

“…Problems caused by the increased amount of metal have been countered by new type of antennas that are integrated into the housing structure [1][2][3][4][5][6][7]. Previous studies have shown promising performance with different antenna configurations.…”

Section: Introductionmentioning

confidence: 99%

“…The first solutions include only metallic side frame. Grounding the frame from few locations creates a dual-loop antenna [1,2], which excites several resonant modes. Loop antennas generally have been a popular choice as presented in [3][4][5]9].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Metal-Covered Handset With Lte Mimo, Wi-Fi Mimo, and GPS Antennas

Kurvinen¹,

Lehtovuori²,

Mai

et al. 2018

PIER C

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Abstract-Current phones include more metal than earlier, which deteriorates the performance of antennas. This paper presents the first complete antenna set designed for a modern handset with a full metal back cover. 4G, Wi-Fi, and GPS antennas are integrated into the metallic side frame of the device in a realistic model. The designed antennas are either capacitive coupling elements with reactive loads or slot antennas. Fixed matching circuits are used to improve total efficiency. The passive implementation enables the use of carrier aggregation (CA) to increase the data rates, and includes also the multipleinput multiple-output (MIMO) operation for 4G and Wi-Fi. The designed antennas cover frequency bands 704-960 MHz, 1.56-1.61 GHz, 1.71-2.69 GHz, 2.4-2.484 GHz, and 5.15-5.875 GHz, producing in measurements a good agreement with simulation results.

show abstract

Section: Design Framework and Principlesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Metal-Covered Handset With Lte Mimo, Wi-Fi Mimo, and GPS Antennas

Kurvinen¹,

Lehtovuori²,

Mai

et al. 2018

PIER C

View full text Add to dashboard Cite

show abstract

“…The antennas proposed in [4,7] were designed in a monopole shape, but they were not suitable for a T-BOX application for their large ground size. With metal rim radiated as main radiator, a loop structure was realized in [8], by selecting short point and feeding point suitably, and a broad bandwidth can be realized. Reconfigurable antenna is also an effective way for bandwidth enhancement, but this technology is not universally applicable.…”

Section: Introductionmentioning

confidence: 99%

A Compact Printed Seven-Band Monopole Antenna for Vehicle-Mounted T-Box

Guo¹,

Cui²

2018

PIER Letters

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Abstract-A seven-band antenna for vehicle-mounted T-BOX with a compact structure is proposed and studied. The proposed antenna is composed of a monopole branch and a ground branch. In addition, a slot is embedded in the monopole branch for bandwidth enhancement. By using 0.25-and 0.5-wavelength modes, the lower band (824-960 MHz) and higher band (1710-2690 MHz) are covered. The working mechanism is analyzed based on S-parameters and surface current distributions. The attractive merits of the proposed antenna are that the structure is compact with a small ground, and no lumped element is used. The measured results show that the antenna can cover the lower band of GSM850/900 and the desired upper band of DCS1800/PCS1900/UMTS2100/LTE2300/2500. The measured efficiencies are also presented.

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“…The solutions to these undesirable coupling were discussed in [1] and [2]. Later in [3], the unbroken metal rim itself was proposed as an antenna for hepta-band applications which would save all the undesired coupling, saving enormous space inside and providing a mechanical stability. Several self-resonant internal mobile handset antennas based on loop antennas capable of covering eight-band WAN/LTE operation in the 698-960 and 1710-2690 MHz bands have been demonstrated in [4]- [7].…”

Section: Introductionmentioning

confidence: 99%

LTE MIMO antenna using unbroken metallic rim and non resonant CCE element

Stanley

Huang

Wang

et al. 2016

2016 10th European Conference on Antennas and Propagation (EuCAP)

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This paper presents a new two-element multiple input multiple output (MIMO) antenna for LTE application using an unbroken metallic rim as the primary antenna and a non-resonant capacitive coupling element (CCE) as a diversity antenna. The primary antenna covers 698-960 MHz and 1710-2690 MHz and the diversity antenna cover 1710-2690 MHz Average efficiencies above 70% and 50% have been achieved by the metallic rim antenna and non-resonant CCE respectively. A trapezoidal shaped feed is used to improve the high band performance. The unbroken metallic rim provides extra mechanical stability to mobile phones and saves the antenna space. Good isolation between the antenna elements has also been achieved. Both antennas are optimized by efficient matching circuits and conform to the requirements of ultra slim modern mobile phones. Index Terms-4G, MIMO, CCE, non-resonant antenna, characteristic mode,.I.

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A Dual-Loop Antenna Design for Hepta-Band WWAN/LTE Metal-Rimmed Smartphone Applications

Cited by 145 publications

References 28 publications

Metal-Covered Handset With Lte Mimo, Wi-Fi Mimo, and GPS Antennas

Metal-Covered Handset With Lte Mimo, Wi-Fi Mimo, and GPS Antennas

A Compact Printed Seven-Band Monopole Antenna for Vehicle-Mounted T-Box

LTE MIMO antenna using unbroken metallic rim and non resonant CCE element

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