NDLI: Low-phase noise oscillator utilising high-Q active resonator based on substrate integrated waveguide technique

Content Provider	IET Digital Library
Author	Chen, Zhe Hong, Wei Chen, Ji Xin Zhou, Jianyi Li, Lin Sheng
Abstract	An X-band low-phase noise planar oscillator employing the substrate integrated waveguide (SIW) active resonator is demonstrated. By compensating the losses in the SIW cavity with an active feedback loop, the Q-factor of the SIW active resonator is greatly improved. The measured results show a loaded Q-factor of 1569 and unloaded Q-factor of 8782, which is very high among other planar resonators. A simplified generalised phase noise condition and its optimisation approach are proposed for the low-phase noise oscillator design. To validate the proposed optimisation approach, experimental prototypes of oscillators using different design parameters and resonators are fabricated. The measured results show that the optimised SIW active resonator oscillator possesses low-phase noise of −109.2 dBc/Hz at 100 kHz at X-band, which is 17 and 9 dB better than the microstrip resonator oscillator and SIW passive resonator oscillator, and is comparable with the dielectric resonator oscillator measured in this study.
Starting Page	137
Ending Page	144
Page Count	8
ISSN	17518725
Volume Number	8
e-ISSN	17518733
Issue Number	Issue 3, Feb (2014)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-map/8/3
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-map.2013.0380
Journal	IET Microwaves, Antennas & Propagation
Publisher Date	2013-11-27
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Active Feedback Loop Dielectric Resonator Oscillator Dielectric Resonator Oscillators Frequency 100 KHz High-Q Active Resonator Loaded Q-factor Low-phase Noise Low-phase Noise Oscillator Low-phase Noise Oscillator Design Microstrip Resonator Microstrip Resonator Oscillator Optimisation Approach Optimised SIW Active Resonator Oscillator Oscillator Phase Noise Planar Resonator Simplified Generalised Phase Noise Condition SIW Active Resonator Oscillator Solid State Microwave Circuit And Device Substrate Integrated Waveguide Substrate Integrated Waveguide Technique Substrate-integrated Waveguide Active Resonator Unloaded Q-factor Waveguide And Microwave Transmission Line Component X-band Low-phase Noise Planar Oscillator
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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