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Design and Implementation of the Mutually Coupled Structure Oscillators for Improved Phase-Noise Characteristics  

Choi, Jeong-Wan (Department of Transmission Engineering, Kwangwoon University)
Do, Ji-Hoon (Department of Transmission Engineering, Kwangwoon University)
Lee, Hyung-Kyu (Department of Transmission Engineering, Kwangwoon University)
Kang, Dong-Jin (Department of Transmission Engineering, Kwangwoon University)
Yoon, Ho-Seok (Department of Transmission Engineering, Kwangwoon University)
Lee, Kyung-Hak (Department of Electronics and Communications Engineering, Kwangwoon University)
Hong, Ui-Seok (Department of Transmission Engineering, Kwangwoon University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.17, no.11, 2006 , pp. 1112-1119 More about this Journal
Abstract
In this paper, mutually coupled oscillator is employed to improve phase noise. Mutually coupled structure oscillator couples two oscillator's phase shifted output signals, that is fabricated using teflon board which has dielectric constant of 2.5 and Surface Mount Gallium Arsenide FET devices. And this paper proposed the structure to bias adjustment for the phase condition of mutually couples. When one oscillator has bias point of 4.4 V and 37 mA, it's output signal has phase noise characteristic of -96.37 dBc(@9305 MHz, offset frequency 100 KHz), -73.46 dBc(10 kHz). and After it's output signal mutually coupled the other's output signal that has bias point of 8.1 V and 69 mA, it has superior phase noise characteristic of -106.7 dBc(@9305 MHz, offset frequency 100 kHz), -81 dBc(10 kHz).
Keywords
Mutually Coupled Structure Oscillator; Phase Noise;
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