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A Design of 5.8 ㎓ Oscillator using the Novel Defected Ground Structure  

Joung, Myoung-Sub (School of Electrical Engineering, College of Engineering, Kookmin University)
Park, Jun-Seok (School of Electrical Engineering, College of Engineering, Kookmin University)
Lim, Jae-Bong (School of Electrical Engineering, College of Engineering, Kookmin University)
Cho, Hong-Goo (School of Electrical Engineering, College of Engineering, Kookmin University)
Publication Information
Journal of electromagnetic engineering and science / v.3, no.2, 2003 , pp. 118-125 More about this Journal
Abstract
This paper presents a 5.8-㎓ oscillator that uses a novel defected ground structure(DGS), which is etched on the metallic ground plane. As the suggested defected ground structure is the structure for mounting an active device, it is the roles of a feedback loop inducing a negative resistance as well as a frequency-selective circuit. Applying the feedback loop between the drain and the gate of a FET device produces precise phase conversion in the feedback loop. The equivalent circuit parameters of the DGS are extracted by using a three-dimensional EM simulation ,md simple circuit analysis method. In order to demonstrate a new DGS oscillator, we designed the oscillator at 5.8-㎓. The experimental results show 4.17 ㏈m output power with over 22 % dc-to-RF power efficiency and - 85.8 ㏈c/Hz phase noise at 100 KHz offset from the fundamental carrier at 5.81 ㎓.
Keywords
Oscillator; Defected Ground Structure(DGS);
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