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Author

Zhong-Qian Niu

2 papers indexed here

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Open access Sep 2026

A 65–115 GHz VNA Extension Frontend Based on A High-Directivity Misaligned Waveguide Branch Coupler

The vector network analyzer (VNA) is the core instrument for S-parameter measurements in microwave and millimeter-wave bands. Frequency extension modules are indispensable for high-frequency testing, in which the directivity of the directional coupler directly determines the reflection measurement accuracy. To address...

Yu-Chi Zhang, Bing-Li Dai, Zhong-Qian Niu et al. · 0 citations
Conference Aug 2026

A 180-260-GHz Double Symmetrical OMT Based on Four Reverse Couplers

The ongoing advancement of the global Internet of Everything leads to an increasing number of wireless communication devices accessing the network and a continuous growth in data traffic. Leveraging an ultra-wideband and multi-mode transmission scheme, terahertz (THz) polarization multiplexing architectures are capable...

Ji-Cong Zhang, Bo Zhang, Yi-Nian Feng et al. · 0 citations

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