In this paper, a center-fed four-way power divider with wideband harmonic suppression is proposed. A distinguishing feature is the use of sectorially modified Gielis curves (SMGCs) for open stubs, shorted stubs, and stub-loaded coupled-line structures, providing more degrees of freedom in the designs to suppress the wideband harmonics. The expressions for the SMGCs, along with the ABCD matrix elements of the stub-loaded coupled-line structure having different even and odd mode electrical lengths (θ_ec ≠ θ_oc) are another distinguishing features presented in this work. The novelty is to use two stages (first and second) with a combination of open, shorted, coupled-line stubs and tapered transmission lines to achieve good impedance matching and wideband harmonic suppression for center-fed antenna arrays. The proposed center-fed four-way power divider achieves a wideband harmonic suppression of up to 4f_o and a relatively wide −10 dB impedance bandwidth of 52%. The proposed power divider is used in a horizontally-polarized antenna array for wireless L-band applications.

中文翻译：

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用于中心馈电天线阵列的具有宽带谐波抑制功能的功率分配器

在本文中，提出了一种具有宽带谐波抑制的中心馈电四路功率分配器。一个显着特点是对开路短截线、短截短截线和短截线加载耦合线结构使用扇形修正 Gielis 曲线 (SMGC)，从而在设计中提供更多自由度以抑制宽带谐波。SMGC 的表达式，以及具有不同偶模和奇模电长度的短线加载耦合线结构的 ABCD 矩阵元素 ( θ _ec  ≠  θ _oc) 是本作品中呈现的另一个显着特征。新颖之处在于使用两级（第一级和第二级），结合开路、短路、耦合线短截线和锥形传输线，为中心馈电天线阵列实现良好的阻抗匹配和宽带谐波抑制。所提出的中心馈电四路功率分配器实现了高达 4 f _o的宽带谐波抑制和 52% 的相对较宽的 -10 dB 阻抗带宽。建议的功率分配器用于无线 L 波段应用的水平极化天线阵列。