【摘要】 本文提出了一种基于空气填充的基片集成波导（AFSIW）滤波并联反馈结构的X频段低相位噪声振荡器。在振荡器设计中，AFSIW滤波并联反馈结构同时充当频率选择元件、功率分配器和匹配网络的作用。它具有低插入损耗、高品质因数、高电路集成度和良好的匹配性能。为了进一步验证，设计、制作和测试了一个带有屏蔽馈电方案的模型。测试结果表明，所提出的并联反馈振荡器在10 GHz频率下工作，在1 MHz频偏处的相位噪声性能为-142.6 dBc/Hz。更多还原

【Abstract】 In this paper, an X-band low phase noise oscillator with parallel feedback configuration based on the air-filled substrate integrated waveguide(AFSIW) filtering rat-race coupler(FRRC) is proposed. The AFSIW FRRC in the oscillator design is utilized to act as the frequency-selective element, power splitter and matching network simultaneously. It exhibits the merits of low insertion loss, high quality factor, high circuit integration and good matching performance. For further verification, a proposed prototype with shielded feeding schemes has been designed, fabricated and measured. The measured results indicate that the proposed parallel feedback oscillator operates at 10 GHz, featuring a low phase noise performance of-142.6 dBc/Hz at 1-MHz frequency offset.更多还原