【摘要】 提出了一种基于微带线（MSL）与空气填充基片集成波导（AFSIW）混合架构的X波段四路全隔离功率合成网络。该功率合成网络在保持低剖面结构和紧凑布局的同时，实现了较高的功率容量。其中，输入网络采用三级联微带（MS） 3-dB定向耦合器构成四路功率分配器，通过非对称传输线优化实现宽带阻抗匹配;输出网络基于SIW 3-dB定向耦合器构建，利用TE₁₀模的场约束特性达成四端口全隔离。为进一步提升性能，该文研究采用X波段四路全隔离功率合成网络。该功率合成网络使用AFSIW结构的定向耦合器代替SIW的定向耦合器，并使用金属结构件屏蔽空气腔，实现了比MS-SIW架构的功率合成网络更低的损耗和更好的散热性能。实测结果表明，所提出的功率合成器的带宽范围为8.8～11.3 GHz，其四路通道间的隔离度在工作带内优于15 d B，回波损耗在9.2～10.4 GHz的范围内整体优于15 d B，在8.6～11.3 GHz的范围内优于10 d B，插入损耗最小值为1.9 dB，功率容量约为23.303 kW。更多还原

【Abstract】 A four-channel fully isolated X-band power combiner network based on a hybrid architecture of microstrip line（ MSL） and air-filled substrate integrated waveguide（ AFSIW） is proposed. This power combiner network achieves high power capacity while maintaining a low-profile structure and compact layout. The input network employs three cascaded microstrip（ MS） 3-dB directional couplers to form four power dividers,achieving broadband impedance matching through asymmetric transmission line optimization. The output network is constructed based on SIW 3-dB directional couplers,utilizing the field constraint characteristics of the TE₁₀mode to achieve four-port full isolation. To further enhance performance,this study adopts an X-band four-channel fully isolated power combiner network. This power combiner network uses AFSIW structure directional couplers instead of SIW directional couplers and uses metal structural components to shield the air cavity,achieving lower losses and better heat dissipation performance than the MS-SIW architecture power combination network. The measured results show that the bandwidth range of the proposed power synthesizer is 8.8 to 11.3 GHz,and the isolation among its four-channels is better than 15 dB in the working band. The overall return loss is better than 15 dB in the range of 9.2 to 10.4 GHz,and better than 10 dB in the range of 8.6 to 11.3 GHz. The minimum insertion loss is 1.9 d B,and the power capacity is 23.303 kW.更多还原