Design of inverted-F antenna for long-term evolution-based wireless handheld devices

In this article, a compact triple-band inverted-F antenna for long-term evolution (LTE)-based wirelesshandheld devices is presented. The proposed antenna comprises three arms, namely the radiating arm, shorting arm,and feeding arm. The structure of the designed antenna looks like an inverted F with folded L-shaped strip antenna.It has three resonant frequencies of 795, 2050, and 3405 MHz with a reflection coefficient of –11.7 dB, –15.1 dB, and–30.5 dB, respectively. The size of the suggested antenna is 10 × 35 × 0.8 mm3and it is built on the FR-4 substratewhich is more compact and easy to integrate with the handheld devices such as laptops, tablets, and smart phones. Theperformances of the proposed antenna are analyzed with the help of computer simulation using Ansys High FrequencyStructure Simulation Software Simulator (HFSS). The measured –10 dB impedance bandwidth of the suggested antennacovers 780–820, 2020–2070, and 3230–3490 MHz, which satisfies the LTE 700, LTE 2100, and LTE 3300. The proposedantenna has the acceptable voltage standing wave ratio (VSWR ≤ 2), bandwidth, gain, and radiation characteristicsacross the operating bands and thus proves its suitability for wireless handheld devices.

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[1] Palandöken M. Artificial materials based microstrip antenna design. In: Nasimuddin Nasimuddin, editor. Microstrip Antennas. London, UK: IntechOpen, Wiley Science, 2011. pp. 43-68. doi: 10.5772/14908
[2] Wu C, Wong K. Ultrawideband PIFA with a capacitive feed for penta-band folder-type mobile phone antenna. IEEE Transactions on Antennas and Propagation 2009; 57 (8): 2461-2464. doi: 10.1109/TAP.2009.2024571
[3] Li Y, Zhang Z, Chen W, Feng Z, Iskander MF. A quadband antenna with reconfigurable feedings. IEEE Antennas and Wireless Propagation Letters 2009; 8 (6): 1069-1071. doi: 10.1109/LAWP.2009.2031415
[4] Boyle KR, Steeneken PG. A five-band reconfigurable PIFA for mobile phones. IEEE Transactions on Antennas and Propagation 2007; 55 (11): 3300-3309. doi: 10.1109/TAP.2007.908822
[5] Chu F, Wong K. Simple folded monopole slot antenna for penta-band clamshell mobile phone application. IEEE Transactions on Antennas and Propagation 2009; 57 (11): 3680-3684. doi: 10.1109/TAP.2009.2025397
[6] Wong K, Chen S. Printed single-strip monopole using a chip inductor for penta-band WWAN Operation in the mobile phone. IEEE Transactions on Antennas and Propagation 2010; 58 (3): 1011-1014. doi: 10.1109/TAP.2009.2039324
[7] Wong KL, Chen WY. Small-size printed loop antenna for penta-band thin-profile mobile phone application. Microwave and Optical Technology Letters 2009; 51 (6): 1512-1517. doi: 10.1002/mop.24359
[8] Zheng M, Wang H, Hao Y. Internal hexa-band folded monopole/dipole/loop antenna with four resonances for mobile device. IEEE Transactions on Antennas and Propagation 2012; 60 (6): 2880-2885. doi: 10.1109/TAP.2012.2194687
[9] Park YK, Sung Y. A reconfigurable antenna for quad-band mobile handset applications. IEEE Transactions on Antennas and Propagation 2012; 60 (6): 3003-3006. doi: 10.1109/TAP.2012.2194672
[10] Li Y, Zhang Z, Zheng J, Feng Z, Iskander MF. A compact hepta-band loop-inverted F reconfigurable antenna for mobile phone. IEEE Transactions on Antennas and Propagation 2012; 60 (1): 389-392. doi: 10.1109/TAP.2011.2167949
[11] Ban Y, Sun S, Li P, Li JL, Kang K. Compact eight-band frequency reconfigurable antenna for LTE/WWAN tablet computer applications. IEEE Transactions on Antennas and Propagation 2014; 62 (1): 471-475. doi: 10.1109/TAP.2013.2287522
[12] Ali T, Khaleeq MM, Biradar RC. A multiband reconfigurable slot antenna for wireless applications. AEU - International Journal of Electronics and Communications 2018; 84: 273-280.
[13] Pan C, Horng T, Chen W, Huang C. Dual wideband printed monopole antenna for WLAN/WiMAX applications. IEEE Antennas and Wireless Propagation Letters 2007; 6: 149-151. doi: 10.1109/LAWP.2007.891957
[14] Komulainen M, Berg M, Palukuru VK, Jantunen H, Salonen E. Frequency-reconfigurable dual-band monopole antenna for mobile handsets. In: IEEE 2007 Antennas and Propagation Society International Symposium, Honolulu, HI USA; 2007. pp. 3289-3292. doi: 10.1109/APS.2007.4396239
[15] Deng C, Li Y, Zhang Z, Feng Z. Planar printed multi-resonant antenna for octa-band WWAN/LTE mobile handset. IEEE Antennas and Wireless Propagation Letters 2015; 14: 1734-1737. doi: 10.1109/LAWP.2015.2421335
[16] Zhang L, Ban Y, Sim C, Guo J, Yu Z.Parallel dual-loop antenna for WWAN/LTE metal-rimmed smartphone. IEEE Transactions on Antennas and Propagation 2018; 66 (3): 1217-1226. doi: 10.1109/TAP.2018.2796724
[17] Palandöken M. Dual broadband antenna with compact double ring radiators for IEEE 802.11 ac/b/g/n WLAN communication applications. Turkish Journal of Electrical Engineering & Computer Sciences 2017; 25 (2): 1326- 1333. doi: 10.3906/elk-1507-121
[18] Wong K, Tsai C. Half-loop frame antenna for the LTE metal-casing tablet device. IEEE Transactions on Antennas and Propagation 2017; 65 (1): 71-81. doi: 10.1109/TAP.2016.2630716
[19] Chang S, Liao W. A broadband LTE/WWAN antenna design for tablet PC. IEEE Transactions on Antennas and Propagation 2012; 60 (9): 4354-4359. doi: 10.1109/TAP.2012.2207075
[20] Lu J, Wang Y. Internal uniplanar antenna for LTE/GSM/UMTS operation in a tablet computer. IEEE Transactions on Antennas and Propagation 2013; 61 (5): 2841-2846. doi: 10.1109/TAP.2013.2243693.
[21] Lin D, Chou J, Wu C, Li H. A novel miniaturized dual-layered LTE printed antenna for handheld devices. IEEE Antennas and Wireless Propagation Letters 2013; 12: 1680-1683. doi: 10.1109/LAWP.2013.2297693
[22] Yu K, Li Y, Luo X, Liu X. A modified E-shaped triple-band patch antenna for LTE communication applications. In: IEEE 2016 International Symposium on Antennas and Propagation (APSURSI); Fajardo, Puerto Rico: Online, 2016, pp. 295-296. doi:10.1109/APS.2016.7695856.
[23] Mohammad S. Sharawi, Printed MIMO Antenna Engineering. London, UK: Artech House, 2014.