Steerable dual-band planar microstrip phased array antenna for 3G and 4G wireless communication systems

In this paper, steerable planar microstrip dual-band phased array antenna is used to steer the main lobe beam on mobile device for directional transmission. By focusing the transmit power toward the right direction, beam-steering can not only improve SNR at the intended receiver but also reduces interfere to peer link, see Figure 1. Single U-slotted rectangular patch antenna element is used to build planar arrays antennas with 4×4 and 8×8 dimensions. More than ±62 degrees for the 4×4 dimensions and ±78 degrees for the 8×8 dimension are achieved for the main-lobe without the presence of any greeting lobes. Single element, linear sub-arrays with 1×2 and 1×4 dimensions of this patch antenna element was designed fabricated and measured by authors [1], [2]. The achieved array antennas are suitable for MIMO 3G and 4G different wireless mobile applications.