Design for Miniaturization of Oscillators using Common DGS

공통 DGS를 이용한 발진기의 소형화 설계

  • Lim, Jongsik (Department of Electrical Engineering, Soonchunhyang University)
  • 임종식 (순천향대학교 전기공학과)
  • Received : 2013.04.22
  • Accepted : 2013.05.09
  • Published : 2013.05.31


In this paper, a design of size-reduced microwave oscillator using common defected ground structure (common DGS) is described. At first, an oscillator is designed using the normal stub resonator, and the conventional DGS patterns are inserted for the first trial of size-reduction. Finally, the DGS resonator section is folded by half size in order to adopt the common DGS, and this produces the proposed size-reduced oscillator. Common DGS pattern is inserted for a better size-reduction than when conventional DGSs are used. The folded transmission line is connected using the 3-dimensional signal via-holes. For an example of design, a 2.1GHz oscillator is designed and fabricated using a small signal transistor and common DGS, which shows the size-reduction of 11 mm. The measurement shows 6.7dBm of output power and -133dBc/Hz@1MHz of phase noise. The measured performances are so similar to those of the oscillators before size-reduction and prove the proposed size-reduction method of oscillators using common DGS.


Oscillators;DGS;Common DGS


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