空间科学学报2026，Vol.46Issue(3)：776-784,9.DOI:10.11728/cjss2026.03.2025-0098
太赫兹空间探测系统中混合网络型宽带双工器技术
Hybrid Network Based Broadband Diplexer Technology for Terahertz Space Exploration Systems
摘要
Abstract
Terahertz space exploration systems are undergoing rapid advancement,with clear trends toward multi-channel operation,multi-spectral capabilities,and ultra-wideband performance.To address the requirements of such evolving systems,this paper introduces a novel waveguide hybrid network-based diplexer covering the entire WR-4 band.This device is specifically engineered for local oscillator signal combining and feeding in dual-band solid-state architectures.The design capitalizes on the inhe-rent advantages of hybrid networks,including their excellent anti-reflection properties and high isolation between ports,while incorporating cascaded high-order low-pass filter to achieve precise frequency sepa-ration.This configuration results in a mechanically robust assembly that is readily manufacturable using Computer Numerical Control(CNC)techniques and easily integrated into larger systems.The develop-ment process encompassed several critical phases:initial conceptual and operational design of the hybrid-network diplexer for full WR-4 band coverage;detailed circuit design of individual components such as hybrid couplers and filters;followed by comprehensive circuit synthesis,optimization,and eventual phy-sical realization through E-plane split-block CNC milling fabrication.Experimental verification confirms the diplexer's outstanding performance in dividing the complete WR-4 spectrum into two well-defined channels spanning 170～210 GHz and 210～260 GHz,respectively.The measured insertion loss remains remarkably low at-1.5 dB for the lower band and-1 dB for the upper band.Impressively,one channel demonstrates isolation characteristics reaching 50 dB,effectively minimizing inter-channel interference.All measured parameters show strong correlation with simulation results,validating both the design methodology and implementation approach.Beyond its core electrical performance,this solid-state diplexer circuit offers numerous practical benefits including simplified mechanical fabrication,straightfor-ward system integration,effortless channel expansion,and straightforward frequency scaling.These at-tributes make the proposed design particularly suitable for next-generation terahertz systems requiring efficient signal separation and management,while providing a versatile platform for future system enhancements and architectural evolution.The combination of electrical performance,manufacturing practicality,and design flexibility positions this diplexer as an attractive solution for advanced terahertz applications.关键词
波导/低通滤波器/混合网络/双工器/WR-4波段/太赫兹Key words
Waveguide/Low-pass filter/Hybrid network/Diplexer/WR-4 band/Terahertz分类
信息技术与安全科学引用本文复制引用
丁江乔,蒋深舟,成加森,蒋露颖,朱皓天..太赫兹空间探测系统中混合网络型宽带双工器技术[J].空间科学学报,2026,46(3):776-784,9.基金项目
民用航天预先研究项目(D010203)和国家自然科学基金项目(12003011,62171432)共同资助 （D010203）
