A new type of planar 180° hybrid using intentional impedance mismatch for improved bandwidth and arbitrary power division ratio
A new type of planar 180° hybrid using intentional impedance mismatch for improved bandwidth and arbitrary power division ratio
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一种新型平面 180° 混合，使用故意阻抗失配来提高带宽和任意功率分配比
DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
D. Ahn
中科院分区：
文献类型：
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作者：
Youna Jang;Seoung;D. Lee;Jongsik Lim;D. Ahn
提出了一种宽带平面 180 混合，用于任意功率分配比并实现级联平面结构。此外，所提出的结构不仅具有与传统环混合相同的功能，而且由于输出端口具有相同的方向，因此在连接其他组件时具有平面级联连接。所提出的平面 180 混合由两个 3 dB 耦合器和 4 条传输线 (TL) 组成，传输线 (TL) 对称，TL 与 ZA 和 ZB 的不同阻抗串联连接。该结构的设计理论基于级联多端口连接形式，从传输矩阵收敛到S参数，并导出ZA和ZB阻抗之比以获得宽带性能。设计方程被验证为幅度和相位特性的测量结果。所提出的结构，无论2个TL是否以级联形式连接，与传统的环形混合结构相比，面积减少了29%。
A wideband planar 180 hybrid is proposed for arbitrary power division ratios and implementing cascaded planar structure. In addition, the proposed structure not only has the same function as the conventional ring hybrid, but also has a planar cascade connection when connecting other components because the output ports have same direction. The proposed planar 180 hybrid consists of two 3 dB couplers, and 4 transmission lines (TLs) with symmetrical TLs connected in series with different impedances of ZA and ZB. The design theory of the proposed structure is based on a cascaded multiport connection form, converged from transmission matrix to S‐parameter, and the ratio of ZA and ZB impedances is derived for wideband performance. The design equations are verified as the measurement results of the magnitude and phase characteristics. The proposed structure, regardless of whether 2 TLs are connected in cascaded form, has a 29% reduced area compared with the conventional ring hybrid.