A Compact Multiband Antenna for 4G/LTE and WLAN Mobile Phone Applications

A very simple multiband monopole antenna system is designed and developed. The proposed antenna system comprises of two alphabetic letter shaped elements: one is C-shaped and another is inverted L-shaped - all together can combinedly operate the wideband frequency range of LTE-1, 2, 3, 7, 13, 14, 22, 40, 43 and WLAN bands. The C-shaped is responsible for leading the lower bands and L-shaped for higher bands. The reflection coefficient is achieved 6 dB in case of LTE-13 and LTE-14 bands, whereas for all other bands is greater than 10 dB. This multiband antenna element has a compact volume of 20 × 24 × 0.8 mm
³
with total system size of 20 × 70 × 0.8 mm
³
, which is suitable for 4G-LTE ultra slim mobile phones and wireless devices.