Compact Eight-Band Frequency Reconfigurable Antenna for LTE/WWAN Tablet Computer Applications

Ban, Yong‐Ling; Sun, Si-Cheng; Li, Pengpeng; Li, Le‐Wei; Kang, Kai

doi:10.1109/tap.2013.2287522

Cited by 88 publications

(52 citation statements)

References 13 publications

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“…Additionally, as for the overall antenna volume of only 35 × 10 × 0.8 mm 3 (280 mm 3 ), the proposed antenna has the merit of an antenna size at least 22% less than the smallest dimension of 45 × 10 × 0.8 mm 3 for the LTE/WWAN internal antenna in a tablet computer. [6] Finally, the proposed monopole strip antenna design is more feasible than those above-mentioned ones [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] for embedding into the tablet computers. Moreover, the internal antennas and the user body is less than 20 cm apart in distance during device use.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, to fulfill the 698-960/1710-2690 MHz bands and suitably embed it into a limited space, a small-size multiband antenna is the most optimal candidate of providing commercial broadband coverage in the bandwidth specifications of the 4G (LTE/ WWAN) system. 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][1...…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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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Section: Introductionmentioning

confidence: 99%

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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“…Amid these reported works, to achieve wider bandwidth and reducing the antenna size, a very popular technique of introducing coupling‐feed mechanism into the antenna design was proposed in Refs. . In addition to that, a unique method of using a shorted strip line to function as an equivalent LC matching circuit was also implemented, in which good impedance matching can be attained without loading any lumped element (inductor or capacitor).…”

Section: Introductionmentioning

confidence: 99%

A novel uniplanar antenna with dual wideband characteristics for tablet/laptop applications

Sim

Chen

et al. 2017

Int J RF Microw Comput Aided Eng

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A novel uniplanar antenna design for tablet/laptop applications is proposed. The proposed antenna with a size of 68 × 12 × 0.8 mm3 is comprised of three strip sections, namely, the feeding strip, parasitic shorted strip, and tuning stub strip (or printed LC matching circuit). Five resonant modes are induced by the proposed antenna, and they are combined to yield two wide operating bands that have 6‐dB return loss bandwidths of more than 50% (695‐1190 MHz and 1690‐2930 MHz). Thus, the proposed antenna can easily cover the entire LTE/WWAN operations working in the 698‐960 MHz and 1710‐2690 MHz bands. Besides demonstrating good radiation efficiency of more than 60% for the two wide operating bands, the proposed antenna also exhibits reduced ground effects, in which reducing the ground size will not deteriorate the antenna's performances.

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“…To achieve multiband operation with a compact antenna size, the frequency reconfigurable antenna has been shown to be a promising candidate for the internal antenna embedded in the mobile device such as the tablet computer and mobile phone. Traditionally, such frequency reconfigurable antennas use the active switching circuit to obtain different antenna configurations for different operating bands. For example, in , the hybrid loop/inverted‐F antenna (IFA) has been obtained by using an active pin diode.…”

Section: Introductionmentioning

confidence: 99%

Hybrid loop/monopole antenna with a passive bandstop circuit for the LTE/GPS operation in the tablet computer

Liao

2016

Micro & Optical Tech Letters

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A hybrid loop/monopole antenna capable of covering the LTE operation in the 698–960/1710–2690 MHz band and the GPS operation at 1575 MHz for the tablet computer application is presented. With the obtained LTE/GPS operation, the antenna requires a small size of 8 × 40 × 3 mm3 only. The antenna is operated as a coupled‐fed loop antenna for the LTE operation and as a coupled‐fed monopole antenna for the GPS operation. The two antenna structures share the same radiation strip, except that the loop antenna with the end terminal thereof short‐circuited to the device ground plane of the tablet computer and the monopole antenna with the end terminal thereof open‐ended. The two antenna structures are configured into one antenna structure using a passive bandstop circuit connected between the end terminal of the antenna's radiation strip and the device ground plane. The bandstop circuit exhibits a very high impedance in the GPS band and a very low impedance in the LTE band, thereby making the antenna operated as a loop antenna for the LTE operation (698–960/1710–2690 MHz) and a monopole antenna at 1575 MHz for the GPS operation. Details of the proposed hybrid loop/monopole antenna are described. Operating principle of the antenna is addressed, and experimental results of the fabricated antenna are presented and discussed. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:630–635, 2016

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Compact Eight-Band Frequency Reconfigurable Antenna for LTE/WWAN Tablet Computer Applications

Cited by 88 publications

References 13 publications

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

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

A novel uniplanar antenna with dual wideband characteristics for tablet/laptop applications

Hybrid loop/monopole antenna with a passive bandstop circuit for the LTE/GPS operation in the tablet computer

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