Ultra-Wideband Planar Tightly Coupled Dipole Antenna Array with 3 : 1 Bandwidth

Le résumé fourni par la source

In this paper, a dual-polarized planar tightly coupled dipole array (TCDA) without an impedance matching layer is proposed. Traditionally, dielectric layers are commonly used in TCDAs to help achieve better impedance matching at wide bandwidth and large scan angles. However, the dielectric layer is generally heavy and thick, which increases the difficulty and cost of antenna manufacturing. Therefore, a study of TCDA elements without an additional dielectric layer is presented. The antenna is mainly composed of two dipoles printed on both sides of the dielectric plate, balun, a square patch, and a floor with holes. The operating bandwidth of the antenna ranges from 2 GHz to 6 GHz, with a single unit size of$15 \text{mm} \times 15 \text{mm} \times 13.95 \text{mm}$. Finally, 25 units are used to form a$5 \times 5$finite array. Simulation results show that the finite array can scan up to$\pm 30^{\circ}$in$E-/ H$-planes, and the active voltage standing wave ratio is less than 3. The antenna has significant advantages such as ultra-wideband (UWB), low cost, miniaturization, and modularity, and is suitable for deployment in aircraft and other platforms with high antenna performance requirements.

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