Novel, Compact and Multiband Antenna for Mobile and Wireless Communication

摘要

In this paper, an open slot antenna fed by a U shaped monople is introduced. The slot antenna radiates in the range from 1.6 to 3.44 GHz and from 3.8 to 5.7 GHz. The slot is formed by an open ring of quarter wavelength at 900 MHz. Thus, the ring acts as a monopole at 900 MHz in addition to a wideband slot radiator in the high frequency range. In order to serve the LTE700 MHz band, another ringe monopole is added to the antenna. The proposed antenna has a -10 dB bandwidth which extends from 674 to 750 MHz, from 872 to 976 MHz, from 1.6 to 3.44 GHz, and from 3.8 to 5.7 GHz. The antenna size is 23 × 31 × 1.5mm~3. A prototype of the antenna was fabricated using FR4 substrate (ε_r = 4.5) with 1.5 mm thickness and loss tangent of 0.025. This paper proposes a new mobile handset antenna structure with low SAR values with compact size that cover most of the mobile operating bands and other wireless applications. The covered bands are the GSM900, DCS1800, PCS1900, UMTS2100, and most of the LTE bands including the LTE700 band. Furthermore, it covers the ISM, WIMAX and the WLAN bands. The SAR calculations are done using the CST 2012 commercial package and the voxel head modal. The SAR values are calculated at different operating bands, different distances, and different orientations. The effect of the human body on the performance of the antenna is tested by calculating the radiation pattern in the presence of the body. The simulation results are compared to the experimental measurements and a good agreement is observed.