In this paper, a dual‐polarized cross‐dipole antenna with wide beam and high isolation is designed and analyzed for base station. The proposed antenna consists of two planar cross dipoles with four square patches, two L‐shaped microstrip lines, two ground plates, four parasitic patches, and a reflector. The square patches are placed between the center of cross dipoles to couple with L‐shaped microstrip lines. By introducing the parasitic patches, the wide beam can be realized. The measured results show that the proposed antenna achieves an impedance bandwidth (|S₁₁| < −10 dB) of about 18.7% (1.9‐2.35 GHz) and an isolation better than 30 dB. A measured gain of 5.7 dBi and a half‐power beamwidth over 120° at the center frequency are obtained. Furthermore, the size of the proposed antenna is only 0.5λ₀ × 0.5λ₀ × 0.22λ₀ (λ₀ is wavelength at the center frequency).

中文翻译：

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基站的宽波束高隔离双极化交叉偶极天线

本文针对基站设计并分析了具有宽波束和高隔离度的双极化交叉偶极天线。拟议中的天线由两个平面交叉偶极子和四个反射器组成，该平面偶极子有四个正方形贴片，两条L形微带线，两个接地板，四个寄生贴片。方形贴片放置在交叉偶极子的中心之间，以与L形微带线耦合。通过引入寄生贴片，可以实现宽光束。测量结果表明，所建议的天线实现了约18.7％（1.9-2.35 GHz）的阻抗带宽（| S ₁₁ | <-10 dB），并且隔离度优于30 dB。在中心频率处获得的测量增益为5.7 dBi，半功率波束宽度超过120°。此外，建议的天线尺寸仅为0.5λ ₀  ×0.5 λ ₀  ×0.22 λ ₀（λ ₀是在中心频率波长）。