Broadband series-fed printed dipole arrays with mutual coupling

A uniplanar printed antenna consisting of the series-fed dipole elements and the conductor-backed coplanar waveguide-to-coplanar stripline (CBCPW-to-CPS) transition with broad impedance bandwidth and end-fire radiation is presented. The measured results of the antenna indicate the operating bandwidth of 100% under the 10 dB return loss criterion and the end-fire radiation patterns with 4.5-9.1 dBi peak gain. Mutual couplings between two series-fed dipole antennas placed in face-to-face as well as side-by-side configurations with different separations are measured. The diversity of the array system is characterized by the correlation coefficient based on mutual coupling between antennas. (c) 2007 Wiley Periodicals, Inc.