Traditional waveguide Magic-T development typically explores suitable combinations of waveguide $E$ - and $H$ -plane T-junctions, which causes its inevitable bulky volume and limited integratability. Aiming at this difficulty, this letter evolves a novel hybrid Magic-T to provide a substitute option. The proposed configuration uses a universal rectangular waveguide (RW) as a sum port for input, and two microstrip probes are inserted in its $E$ -plane and distributed symmetrically along the $E$ -field-max axis to form the output ports. Then, the difference port connected by two coupling slits is placed on the opposite side of the microstrip probes. Therefore, this structure has a very compact size and the ability to integrate directly with the active chips because it avoids the use of waveguide T-junctions and employs a microstrip outputs setup. A Magic-T prototype has been fabricated and measured, and the results show great performance across the entire 26–40 GHz (Ka-band), including low loss, high isolation, and good amplitude/phase consistency.

中文翻译：

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使用波导到微带双探头转换的紧凑型 Ka 波段 Magic-T

传统波导 Magic-T 开发通常探索波导的合适组合 $E$- 和 $H$-平面 T 形结，这导致其不可避免的体积庞大和可集成性有限。针对这个难点，本信进化出一种新颖的混合Magic-T来提供替代选择。建议的配置使用通用矩形波导 (RW) 作为输入的总和端口，两个微带探头插入其 $E$-平面并沿对称分布 $E$-field-max 轴形成输出端口。然后，通过两个耦合狭缝连接的差分端口放置在微带探针的另一侧。因此，这种结构具有非常紧凑的尺寸，并且能够直接与有源芯片集成，因为它避免使用波导 T 型结并采用微带输出设置。已制作并测量了一个 Magic-T 原型，结果显示在整个 26–40 GHz（Ka 波段）具有出色的性能，包括低损耗、高隔离度和良好的幅度/相位一致性。