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Miniature differential-mode dual-band antenna module embedded with broadband balun

机译:内置宽带巴伦的微型差模双频天线模块

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A miniaturized dual-band differential-mode antenna with a broadband 1:1 balun is integrated in a 1-mm thick multi-layer PCB substrate. A broadband balun for the 2.5 GHz and 5.2 GHz dual-band, was designed and fabricated with a broadside-coupled line structure. With a proposed deembedding method, mixed-mode S-parameters of the unit balun were extracted with measured data. Simulated and measured return losses were better than 12 dB in the dual-band. With the balun, a miniaturized dual-band antenna embedded with lumped-elements was integrated. The lumped elements were also used for impedance-matching with the balun. The size is 60 % smaller than the half-wave dipole antenna. Measured return loss of the integrated antenna connected to a coaxial cable was 15.3 dB at 2.5 GHz and 24.1 dB at 5.2 GHz. Measured gain was almost omni-directional in both the bands. The maximum gain was -0.5 dBi at 2.5 GHz and 1.1 dBi at 5.2 GHz.
机译:1毫米厚的多层PCB基板中集成了具有1:1平衡不平衡变压器的小型化双频差模天线。采用宽边耦合线结构设计和制造了用于2.5 GHz和5.2 GHz双频段的宽带巴伦。通过提出的去嵌入方法,使用测量数据提取了单位巴伦的混合模式S参数。在双频段中,仿真和测量的回波损耗优于12 dB。借助巴伦,集成了嵌入集总元件的微型双频天线。集总元件也用于与平衡-不平衡变换器的阻抗匹配。尺寸比半波偶极子天线小60%。连接到同轴电缆的集成天线的测量回波损耗在2.5 GHz时为15.3 dB,在5.2 GHz时为24.1 dB。在两个频带中,测得的增益几乎都是全向的。最大增益在2.5 GHz时为-0.5 dBi,在5.2 GHz时为1.1 dBi。

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