1. European Commission 2015 Study on Cost Benefit Analysis of Smart Metering Systems in EU Member States.
2. Chen, F., N. Wang, R. German, and F. Dressler, "Performance evaluation of IEEE 802.15. 4 LR-WPAN for industrial applications," Fifth Annual Conference on Wireless on Demand Network Systems and Services, 2008, WONS 2008, 89-96, IEEE, January 2008.
doi:10.1109/WONS.2008.4459361 Google Scholar
3. Callaway, E., P. Gorday, L. Hester, J. A. Gutierrez, M. Naeve, B. Heile, and V. Bahl, "Home networking with IEEE 802.15. 4: A developing standard for low-rate wireless personal area networks," IEEE Communications Magazine, Vol. 40, No. 8, 70-77, 2002.
doi:10.1109/MCOM.2002.1024418 Google Scholar
4. Lu, J. H. and Y. S. Wang, "Planar small-size eight-band LTE/WWAN monopole antenna for tablet computers," IEEE Transactions on Antennas and Propagation, Vol. 62, No. 8, 4372-4377, 2014.
doi:10.1109/TAP.2014.2327659 Google Scholar
5. Mahatthanajatuphat, C., S. Saleekaw, P. Akkaraekthalin, and M. Krairiksh, "A rhombic patch monopole antenna with modified Minkowski fractal geometry for UMTS, WLAN, and mobile WiMAX application," Progress In Electromagnetics Research, Vol. 89, 57-74, 2009.
doi:10.2528/PIER08111907 Google Scholar
6. Ban, Y. L., S. C. Sun, J. W. Li, and W. Hu, "Compact coupled-fed wideband antenna for internal eight-band LTE/WWAN tablet computer applications," Journal of Electromagnetic Waves and Applications, Vol. 26, No. 17-18, 2222-2233, 2012.
doi:10.1080/09205071.2012.730655 Google Scholar
7. Wong, K. L. and L. C. Lee, "Multiband printed monopole slot antenna for WWAN operation in the laptop computer," IEEE Transactions on Antennas and Propagation, Vol. 57, No. 2, 324-330, 2009.
doi:10.1109/TAP.2008.2011391 Google Scholar
8. Sze, J. Y. and Y. F.Wu, "A compact planar hexa-band internal antenna for mobile phone," Progress In Electromagnetics Research, Vol. 107, 413-425, 2010.
doi:10.2528/PIER10020603 Google Scholar
9. Wong, K. L. and C. Y. Tsai, "Half-loop frame antenna for the LTE metal-casing tablet device," IEEE Transactions on Antennas and Propagation, Vol. 65, No. 1, 71-81, 2017.
doi:10.1109/TAP.2016.2630716 Google Scholar
10. Chiu, C. W., C. H. Chang, and Y. J. Chi, "Multiband folded loop antenna for smart phones," Progress In Electromagnetics Research, Vol. 102, 213-226, 2010.
doi:10.2528/PIER10011601 Google Scholar
11. Rosenberg, H., H. Jidhage, and B. Svensson, , Sony Mobile Communications AB, Wideband loop antenna, U.S. Patent 7,342,539, 2008. Google Scholar
12. Adachi, T., A. Hirata, and T. Shiozawa, "Folded loop antennas for handset terminals at the 2.0GHz band," Microwave and Optical Technology Letters, Vol. 36, No. 5, 376-378, 2003.
doi:10.1002/mop.10768 Google Scholar
13. Naser-Moghadasi, M., Z. Mansouri, S. Sharma, F. B. Zarrabi, and B. S. Virdee, "Low SAR PIFA antenna for wideband applications," IETE Journal of Research, Vol. 62, No. 5, 564-570, 2016.
doi:10.1080/03772063.2015.1135300 Google Scholar
14. Jeon, S. and H. Kim, "Mobile terminal antenna using a planar inverted e feed structure for enhanced impedance bandwidth," Microwave and Optical Technology Letters, Vol. 54, No. 9, 2133-2139, 2012.
doi:10.1002/mop.27035 Google Scholar
15. Lu, J. H. and F. C. Tsai, "Planar small-size LTE/WWAN tablet computer antenna with eight-band operation," Journal of Electromagnetic Waves and Applications, Vol. 29, No. 8, 1032-1046, 2015.
doi:10.1080/09205071.2015.1029644 Google Scholar
16. Wong, K. L. and M. T. Chen, "Very low profile dual wideband loop antenna for LTE tablet computer," Microwave and Optical Technology Letters, Vol. 57, No. 1, 141-146, 2015.
doi:10.1002/mop.28802 Google Scholar
17. Anguera, J., A. And´ujar, M. C. Huynh, C. Orlenius, C. Picher, and C. Puente, "Advances in antenna technology for wireless handheld devices," Digital Communication World, Vol. 2013, No. 1921, 388-391, 2014. Google Scholar
18. Wong, K. L. and and Y. C. Liu, "Small size WWAN tablet computer antenna with distributed and lumped parallel resonant circuits," Microwave and Optical Technology Letters, Vol. 54, No. 6, 1348-1353, 2012.
doi:10.1002/mop.26811 Google Scholar
19. Chen, S. C. and Y. C. Tsou, "Bandwidth enhancement of a monopole exciter by using a chipi-nductor-loaded shorted strip," Journal of Electromagnetic Waves and Applications, Vol. 30, No. 11, 1481-1492, 2016.
doi:10.1080/09205071.2016.1204251 Google Scholar
20. Upadhyaya, T. K., V. V. Dwivedi, S. P. Kosta, and Y. P. Kosta, "Miniaturization of tri band patch antenna using metamaterials," 2012 Fourth International Conference on Computational Intelligence and Communication Networks (CICN), 45-48, IEEE, November 2012. Google Scholar