A Broadband Planar Magic-T Using Microstrip–Slotline Transitions
A Broadband Planar Magic-T Using Microstrip–Slotline Transitions
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DOI：
10.1109/tmtt.2007.912213
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发表时间：
2008-01
影响因子：
4.3
通讯作者：
K. U-yen;Edward J. Wollack;J. Papapolymerou;J. Laskar
中科院分区：
文献类型：
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作者：
K. U-yen;Edward J. Wollack;J. Papapolymerou;J. Laskar
提出了使用微带槽线过渡的宽带平面 magic-T 的改进版本。该设计采用小型微带槽线 T 形结和最小尺寸的槽线端子，以减少辐射损耗。多节阻抗变换网络用于增加工作带宽并最大限度地减少微带槽线 T 形接头周围的寄生耦合。因此，与早期的 magic-T 设计相比，改进的 magic-T 在和端口和差端口处具有更大的带宽和更低的相位不平衡。实验结果表明，10GHz magic-T 提供超过 70% 的 1dB 工作带宽，平均带内插入损耗小于 0.6dB。它还具有分别小于plusmn1deg 和plusmn0.25 dB 的相位和幅度不平衡。
The improved version of a broadband planar magic-T using microstrip-slotline transitions is presented. The design implements a small microstrip-slotline tee junction with minimum size slotline terminations to reduce radiation loss. A multisection impedance transformation network is used to increase the operating bandwidth and minimize the parasitic coupling around the microstrip-slotline tee junction. As a result, the improved magic-T has greater bandwidth and lower phase imbalance at the sum and difference ports than the earlier magic-T design. The experimental results show that the 10-GHz magic-T provides more than 70% of 1-dB operating bandwidth with the average in-band insertion loss of less than 0.6 dB. It also has phase and amplitude imbalance of less than plusmn1deg and plusmn0.25 dB, respectively.