Ultrawideband, Wide Scanning Stripline-Fed Tightly Coupled Array Antenna Based on Parallel-Dipole Elements

Sensors

Jian Zi¹  Xiaohan Liu¹  Jianping Zeng¹  Lei Shi¹  Fang Guan¹  Ang Chen¹  Zhe Zhang¹  Xiuye Liang¹  Weishuang Yin¹ 

[1] Department of Physics, Fudan University, Shanghai 200438, China;

关键词: ultrawideband (UWB);    phased array antenna;    tightly coupled dipole array (TCDA);    cross-polarization;    wireless sensing;   

DOI  :  10.3390/s20185065

来源: DOAJ

【 摘 要 】

A stripline-fed tightly coupled array antenna with compact size, large scan volume and low cross-polarization characteristics is proposed for ultrawideband (UWB) applications. Simple impedance-matching process is realized by using parallel dual dipoles. Meanwhile, the parallel symmetrical radiating structures minimize the cross-polarization field components dramatically. The mitigation of various undesired resonances is studied in detail. An infinite array is designed to achieve 3:1 bandwidth (6−18 GHz) when scanning ±60${}^{\circ }$ in the E-/D-planes (VSWR < 2.5) and H-plane (VSWR < 3.5). The cross-polarization levels remain below −29 dB at broadside. A 16 × 16 prototype is fabricated to demonstrate the design. The measured results are consistent well with the simulated ones. The overall size of the prototype at the lowest operating frequency is $3\times 3\times 0.4{\lambda }_0^3$ ($15\times 15\times 2{\mathrm{cm}}^3$). Due to its wide bandwidth, good electronic scan performance and compact size, the proposed antenna array is a good candidate for modern wireless platforms.

【 授权许可】

Unknown