A Novel Low Profile Multi-Band Antenna for LTE Handset
A low profile antenna, using coupled-fed, meandered, and folded Planar Inverted–F antenna (PIFA), is proposed to cover multi-band Wireless Wide Area Network (WWAN) operations. The proposed antenna, which is suitable for modern 4G mobile phones, requires o
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Abstract A low profile antenna, using coupled-fed, meandered, and folded Planar Inverted–F antenna (PIFA), is proposed to cover multi-band Wireless Wide Area Network (WWAN) operations. The proposed antenna, which is suitable for modern 4G mobile phones, requires only a small foot print of 44 9 20 mm2. The antenna covers band 14 of LTE-700, GSM-850, GSM-900, DCS-1800, PCS-1900, WCDMA-2100, and band 41 of LTE-2500. In addition to the common WWAN frequencies for mobile communication, the antenna also covers the IEEE802.11b band. The proposed antenna has three simple structures comprising a coupled-fed strip, a meandered shorted-patch, and a folded-patch. These elements are capacitively coupled to each other to form resonant regions in the low bands and the high bands. Modifications to the ground plane are added to achieve a good operation in LTE low band. In the scope of this paper, simulation results, using CST software, are presented to show the effectiveness of the proposed antenna.
Keywords PIFA Low profile LTE Modified ground
Broadband Folded patch Meandered-line
1 Introduction Currently, mobile communication devices require antennas to have the ability to operate in multi-frequency bands, such as GSM 850/900, DSC 1800, PCS 1900, UMTS 2100, and new LTE bands. In addition, mobile devices are becoming B. N. Nguyen (&) D. U. Nguyen T. Van Su B. D. Nguyen M. Linh School of Electrical Engineering, International University—Vietnam National University, Hochiminh City, Vietnam e-mail: [email protected] D. U. Nguyen e-mail: [email protected]
J. J. (Jong Hyuk) Park et al. (eds.), Multimedia and Ubiquitous Engineering, Lecture Notes in Electrical Engineering 240, DOI: 10.1007/978-94-007-6738-6_99, Ó Springer Science+Business Media Dordrecht(Outside the USA) 2013
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smaller, slimmer and multi-function integrated, forcing the size of the internal antenna to be smaller. Thus, many researches in designing compact and broad band handset antenna have been published recently [1–9]. In the near future the demanding of the 4th generation of communications is expected to grow. Therefore, the mobile communication antenna will have to incorporate the LTE bands as well. Although LTE standard can be used with many different frequency bands, LTE 700 is of interest because of its availability and low cost deployment. Designing an antenna for a low frequency, specifically the LTE-700 band, with a low profile poses a difficulty on the limited dimensions of typical modern mobile phones. The typical size of the antenna at the low frequency band is usually much larger than the typical size of the mobile devices. Recently, planar inverted-F antenna (PIFA) has been employed widely as internal antenna for mobile handsets thanks to its low profile, light weight, low cost, versatile characteristics. Nonetheless, PIFA in its original shape has disadvantage of narrow bandwidth. Thus, some techniques to make PIFA broadband and compact such as inserting slots, matching network, meandering and fo
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