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A phase noise reduction method in microwave oscillator using a high‐Q transmission line loaded with active SIW resonator
Author(s) -
Li Zhipeng,
Liu Yongzhi,
Bao Jingfu
Publication year - 2016
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.29536
Subject(s) - microwave , phase noise , transmission line , resonator , reduction (mathematics) , acoustics , materials science , phase (matter) , electrical engineering , noise reduction , line (geometry) , electronic engineering , optoelectronics , engineering , physics , telecommunications , mathematics , geometry , quantum mechanics
In this letter, a transmission line (TL) loaded with active circular substrate integrated waveguide (SIW) resonator is presented and used in microwave oscillator to reduce phase noise. By compensating the resonance loss in SIW cavity using coupling negative resistance method in active resonator, the TL loaded with active SIW resonator exhibits a sharp reflective property at the fundamental mode resonance frequency which is suitable for series feedback oscillator. The simulated loaded Q‐factor of the proposed TL achieves 379. To validate this method, X‐band oscillators using TL loaded with active and passive SIW resonator are designed and implemented. The measured results show that the oscillator base on active SIW resonator exhibits a low phase noise of −128.75 dBc/Hz at 1 MHz offset frequency from 11.01 GHz carrier, which is 9 dB better than the oscillator based on passive SIW resonator. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:221–225, 2016