An Inmarsat BGAN Terminal Patch Antenna Array With Unequal Input Impedance Elements and Conductor-Backed ACPW Series-Feed Network

作者：Wang, Zhongbao^*; Fang, Shaojun; Fu, Shiqiang; Jia, Shouli

来源：IEEE Transactions on Antennas and Propagation, 2012, 60(3): 1642-1647.

DOI：10.1109/TAP.2011.2180325

• Asymmetric coplanar waveguide
• broadband global area network
• circularly polarized
• portable terminal
• sequentially rotated array
• three-dimensional meander strip

A novel 2 x 2 sequentially rotated patch antenna array with unequal input impedance elements and a conductor-backed asymmetric coplanar waveguide (ACPW) series-feed network is proposed. The corner truncated patch element is fed by a three-dimensional meander strip, which can easily control the input impedance and has slight effects on the radiation performance. Compared to microstrip-line feed networks, the radiation loss of the proposed feed network is lower. Furthermore, the maximum characteristic impedance of transmission lines in the proposed feed network is 91.2 Ohm. As a result, it can be easily realized with printed circuit board (PCB) techniques. The measured results show that the proposed antenna array has an impedance bandwidth (VSWR < 1.5) of about 40.5% (1244-1876 MHz), a 3-dB axial ratio (AR) bandwidth of about 25.6% (1412-1826 MHz), and a gain-level larger than 11.6 dBi across the broadband global area network (BGAN) operating bands. Therefore, the proposed antenna array can be a good candidate for Inmarsat BGAN portable terminal applications.

• 出版日期2012-3
• 单位大连海事大学