Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
권호 표지
DOI QR코드

DOI QR Code

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
Download PDF
⟨ Previous Next ⟩

Abstract

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.

본 논문에서는 공통 결함접지구조(common defected ground structure, CDGS)를 이용하여 설계한 초고주파 발진기에 대하여 기술한다. 먼저 일반적인 스터브 공진기를 사용하여 발진기를 설계하고, 이를 종래처럼 DGS를 삽입하여 소형화하는 방법을 이용하였다. 최종적으로 DGS 공진기 부분을 반으로 접은 공통 DGS 구조를 이용하여 크기를 대폭 줄인 발진기를 설계하였다. 종래의 DGS를 이용한 경우보다 더욱 소형화된 회로를 얻기 위하여 공통 DGS 구조를 삽입하였다. 공통 DGS 구조를 이용하기 위하여 접혀진 신호선로는 3차원적인 신호선 비어홀(signal via-hole)로 서로 연결된다. 한 설계예로 2.1GHz대에서 소신호 트랜지스터와 공통 DGS 구조를 이용하여 소형화한 발진기를 설계하였다. 설계한 발진기는 표준형 회로에 비하여 11mm만큼 감소한 크기를 가졌다. 제작한 회로를 실제로 측정한 결과 6.7dBm의 출력과 -133dBc/Hz@1MHz의 위상잡음 특성을 얻었다. 출력의 크기는 소형화 이전과 유사한데, 이로써 제안한 발진기 구조의 타당성이 검증된다.

Keywords

References

  1. V. Radisic, Y. Qian, R. Coccioli, and T. Itoh, "Novel 2-D Photonic Bandgap Structure for Microstrip Lines," IEEE Microwave Guide Wave Letters, vol. 8, no. 2, pp. 69-71, Feb. 1998. DOI: http://dx.doi.org/10.1109/75.658644
  2. T. Yun and K. Chang, "Uniplanar One-Dimensional Photonic-Bandgap Structures and Resonators," IEEE Trans. Microwave Theory Tech., vol. 49, no. 3, pp. 549-553, Mar. 2001. DOI: http://dx.doi.org/10.1109/22.910561
  3. C. Jung, H. Yoon, K. park, J. Lim, H. Choi, and D. Ahn, "A Design of Kuroda Low-pass Filter using DGS", Journal of the Korea Academia-Industrial Cooperation Society, vol. 10, no. 4, pp. 765-770, Apr. 2009. DOI: http://dx.doi.org/10.5762/KAIS.2009.10.4.765
  4. D. Ahn, J. Park, C. Kim, J. Kim, Y. Qian, and T. Itoh, "A Design of the Low-Pass Filter Using the Novel Microstrip Defected Ground Structure," IEEE Trans. Microwave Theory Tech., vol. 49, no. 1, pp. 86-93, Jan. 2001. DOI: http://dx.doi.org/10.1109/22.899965
  5. M. Hwang, S. Oh, J. Koo, C. Park, J. Lim, Y. Jeong, K. Choi, and D. Ahn, "An Active Resonator Using Defected Ground Structure with Islands," Proceedings of the 2007 Asia Pacific Microwave Conference, Dec. 2007, pp. 2677-2680. DOI: http://dx.doi.org/10.1109/APMC.2007.4554697
  6. J. Lim, J. Park, Y. Lee, D. Ahn, and S. Nam, "Application of Defected Ground Structure in Reducing the Size of Amplifiers," IEEE Microwave and Wireless Component Letters, vol. 12, no. 7, pp. 261-263, Jul. 2002. DOI: http://dx.doi.org/10.1109/LMWC.2002.801139
  7. J. Lee, J. Lee, J. Lim, and D. Ahn, "Design of A Miniaturized Low Pass Filter Using Common Defected Ground Structure", Journal of the Korea Academia-Industrial Cooperation Society, vol. 12, no. 5, pp. 2298-2304, May 2011. DOI: http://dx.doi.org/10.5762/KAIS.2011.12.5.2298
  8. D. M. Pozar, Microwave Engineering, 3/e, John Wiley and Sons, Inc., New York, pp. 143-148, 2005.
  9. Y. Lee, J. Lim, J. Park, D. Ahn, S. Nam, "A Novel Phase Noise Reduction Technique in Oscillators Using Defected Ground Structure," IEEE Microwave and Wireless Component Letters, vol. 12, no. 2, pp. 39-41, Feb. 2002. DOI: http://dx.doi.org/10.1109/7260.982870
  10. F. P. Casares-Miranda, C. Viereck, C. Camacho- Pe-alosa, and C. Caloz, "Vertical microstrip transition for multilayer microwave circuits with decoupled passive and active layers," IEEE Microwave and Wireless Component Letters, vol. 16, no. 7, pp. 401-403, Jul. 2006. DOI: http://dx.doi.org/10.1109/LMWC.2006.877144