In this paper, we propose a high-gain series-fed eight-element printed dipole array antenna. Each dipole has the same size, the spacing between each dipole is identical, and the dipoles are connected in a series with a coplanar stripline. Broadband impedance matching is achieved with the balun, which consists of two slot lines of different lengths and widths on one side of the substrate and a tapered microstrip line on the other side of the substrate. The impedance bandwidth of the eight-element printed dipole array antenna is 34.3%, and the gain is 9.2-13.3 dBi. The radiation patterns exhibit endfire characteristics. The overall size of the designed array antenna is 15×0.254 × 47.8mm3(1.4×\0.024×4.5λ03).
This work was supported in part by Institute for Information & Communications Technology Promotion (IITP) grant funded by the Korea government (MSIP) (No. 2017-0-00959, University ICT Basic Research Lab), in part by \u201cHuman Resources Program in Energy Technology\u201d of the Korea Institute of Energy Technology Evaluation and Planning (KETEP), granted financial resource from the Ministry of Trade, Industry & Energy, Republic of Korea (No. 20164030201380).
