Miniaturized Wilkinson Power Divider with Extra-Coupled Line Section for Compensation
Miniaturized Wilkinson Power Divider with Extra-Coupled Line Section for Compensation
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具有用于补偿的额外耦合线路部分的小型化威尔金森功率分配器
DOI：
10.1002/mop.29216
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发表时间：
2015
影响因子：
1.5
通讯作者：
Masayuki Yoshikawa
中科院分区：
文献类型：
--
作者：
Xiaolong Wang;Zhewang Ma;Iwata Sakagami;Atsushi Mase;Masayuki Yoshikawa
本文采用λ/4耦合微带线段设计双向小型化威尔金森功分器。为了补偿λ/4耦合微带线段的相速差，在λ/4耦合微带线段与两个输出端口之间连接了额外的耦合微带线段。由于没有使用集总元件，这种补偿方法不仅提供了紧凑的电路尺寸和容易制造，而且适用于高频操作。设计方程是从偶模态和奇模态分析中推导出来的。几个设计实例表明：（1）附加耦合线段可以补偿λ/4耦合微带线段中的任意耦合强度，且其耦合强度可以任意调节。(ii)从S22、S33和S32的带宽来看，λ/4耦合微带线段的耦合强度起主要作用，随着耦合强度的增加，带宽变窄。与传统的均匀介质中λ/4耦合线截面模型相比，带宽差异很小，可以忽略不计。换句话说，所提出的模型可以提供相同的性能，为非均匀介质的应用。(iii)附加耦合线段的长度随λ/4耦合线段耦合强度的增大而增大，随附加耦合线段耦合强度的增大而减小。在实验中，制作了一个电路，测量结果与理论结果吻合良好。© 2015 Wiley Periodicals，Inc.微波光学技术快报57：1869-1873，2015
In this article, λ/4 coupled microstrip line section is used in the design of two‐way miniaturized Wilkinson power divider. To compensate the phase velocity difference in λ/4 coupled microstrip line section, extra coupled line section is connected between λ/4 coupled line section and two output ports. Due to no lumped elements have been used, this compensation method not only provides compact circuit size and easy fabrication but also suitable for high frequency operation. Design equations are derived from even‐ and odd‐mode analyses. Several design examples show that: (i) Extra coupled line section could compensate arbitrary coupling strength in λ/4 coupled microstrip line section, and its coupling strength also can be adjusted arbitrarily. (ii) Considering the bandwidths of S22, S33, and S32, the coupling strength of λ/4 coupled microstrip line section plays a major role, the bandwidths become narrower as coupling strength increased. Compared with the conventional λ/4 coupled line section model in homogeneous medium, the bandwidth differences are very small, and they can be negligible. In other word, the proposed model could provide the same performance for inhomogeneous medium application. (iii) The length of extra coupled line section becomes longer as coupling strength of λ/4 coupled line section increased, however, it becomes shorter as coupling strength of extra coupled line section increased. In experiment, one circuit was fabricated, the measurement results showed good agreement with theoretical results. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:1869–1873, 2015