Printed multi-resonant antenna embedding two inductors in radiating strips for internal mobile phone LTE/WWAN operation

Ban, Yong‐Ling; Chen, J.-H.; Li, Le‐Wei; Hu, Wei

doi:10.1080/09205071.2012.729558

Cited by 8 publications

(6 citation statements)

References 19 publications

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“…Figure 10 order resonant modes. Comparable E ϕ and E θ components in the three principal planes are seen, and the radiation patterns also show no special distinction compared to those of the conventional internal antennas [20][21][22][23][24]. Figure 11 shows the measured antenna peak gain and radiation efficiency for the proposed tablet computer antenna.…”

Section: Resultsmentioning

confidence: 97%

“…All measured impedance bandwidth of the proposed antenna meets the required bandwidth specification from 810 to 980 MHz and 1630 to 2240 MHz with VSWR below 3 : 1, which satisfies the demanded bandwidth specification for the GSM850/900 and GSM1800/1900/UMTS2100 operation. Notice that 3 : 1 VSWR is widely accepted as the design specification for the internal WWAN tablet computer antennas [15][16][17]20].…”

Section: Resultsmentioning

confidence: 99%

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Printed Antenna for Penta-Band Wwan Tablet Computer Application Using Embedded Parallel Resonant Structure

Chen¹,

Ban²,

Sun³

et al. 2013

PIER

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Abstract-A compact printed antenna for WWAN tablet computer application is proposed in this article. The designed antenna occupies a small area of 35 × 12 mm 2 , which is small enough to be incorporated in a tablet computer, and is placed close to the edge of the shielding wall with a distance of 10 mm. The antenna has a simple structure of comprising a long coupling strip and a feeding strip to capacitively excite the long coupling strip. In this scheme, a chip inductor is loaded on one branch of the feeding strip, which can form a parallel resonant structure to enhance the bandwidth of the lower band. As a result, two wide operating bands to cover GSM850/900 and GSM1800/1900/UMTS2100 operation are obtained with desired 3 : 1 VSWR. The proposed antenna is an all-printing structure with low production cost, which is especially suited for the thin-profile tablet computers.

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

Printed Antenna for Penta-Band Wwan Tablet Computer Application Using Embedded Parallel Resonant Structure

Chen¹,

Ban²,

Sun³

et al. 2013

PIER

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show abstract

“…The various applications of several planar monopole antennas (MAs) developed for LTE/WWAN operations include tablet computers, [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] laptop computers [18][19][20], and mobile phones. [21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37] However, those presented antenna designs have the drawbacks in the larger antenna size [3][4][5][6][7][8][9][10] or insufficient operating bandwidth [11][12][13][14][15][16]…”

Section: Introductionmentioning

confidence: 99%

Planar small-size LTE/WWAN tablet computer antenna with eight-band operation

Tsai

2015

Journal of Electromagnetic Waves and Applications

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By attaching a C-shaped parasitic monopole strip on the backside of the antenna, a novel compact eight-band monopole antenna (MA) is proposed and embedded in the LTE/WWAN tablet computer. The operating impedance bandwidths of 264/ 997 MHz can be obtained across the LTE/WWAN bands, respectively. Given that the overall antenna size is only 35 × 10 × 0.8 mm 3 , the proposed planar MA provides more than 22% reduction in antenna size over that of the conventional ones. Meanwhile, this small-size MA provides the measured peak gains and antenna efficiencies of 2.0/3.2 dBi and 60/66% for the LTE/WWAN bands, respectively. Additionally, to fulfill the limitation of 1.6 W/kg of the 1-g body specific absorption rate (SAR) requirement for mobile device applications, the proposed planar compact MA is deposited inside the tablet computer for the study of radiating performance.

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“…The planar inverted‐F antenna (PIFA) and inverted‐F antenna can be thought as a mixed/combined dipole and slot antenna. The main type for stick‐type handsets are PIFA and folded monopole . Due to the lower profile and wider bandwidth than PIFA, monopole antennas are popular for slim mobile phones.…”

Section: Introductionmentioning

confidence: 99%

“…For bandwidth enhancement among monopole antennas (Table ), some have branch arms and use chin inductor to extend arm or have parasitic element using shorting pin or a chip inductor at coupled feed . However, they all have some disadvantages, such as, narrower bandwidths (at low or high band), larger dimensions (height above the ground plane, width or thickness), with respect to the proposed antenna.…”

Section: Introductionmentioning

confidence: 99%

An internal octa‐band printed antenna for mobile phones LTE applications

Wang

Yang

2014

Micro & Optical Tech Letters

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A novel compact internal antenna combining a monopole and a parasitic planar inverted‐F antenna type of structure is presented. Based on voltage standing wave ratio <3:1, the operation bandwidths are 42% from 704 to 1083 MHz and 57.7% from 1660 to 3000 MHz to cover LTE700/GSM850/900/DCS1800/PCS1900/UMTS/LTE2300/LTE2500 for mobile phones. The proposed antenna is designed and printed on printed circuit board with compact size of 60 × 15 × 1.2 mm3. Measured average low band efficiency is about 60% and high band efficiency is about 70%. The simulated specific absorption rate at required frequency is less than 1.0 mW/g. Both antenna size and performance showed that this antenna has great potential for slim phone applications. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:247–252, 2015

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Printed multi-resonant antenna embedding two inductors in radiating strips for internal mobile phone LTE/WWAN operation

Cited by 8 publications

References 19 publications

Printed Antenna for Penta-Band Wwan Tablet Computer Application Using Embedded Parallel Resonant Structure

Printed Antenna for Penta-Band Wwan Tablet Computer Application Using Embedded Parallel Resonant Structure

Planar small-size LTE/WWAN tablet computer antenna with eight-band operation

An internal octa‐band printed antenna for mobile phones LTE applications

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