Browse > Article

A Design of Amplifier Using Harmonic Termination Impedance Matching Tuner and Bias Line  

Lee Jin-Kuk (Department of Information & Communication Engineering, Chungbuk National University)
Kim Su-Tae (Department of Information & Communication Engineering, Chungbuk National University)
Lim Jong-Sik (Division of Information Technology Engineering, Soonchunhyang University)
Jeong Yong-Chae (Department of Information & Communication Engineering, Chungbuk National University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.16, no.12, 2005 , pp. 1186-1193 More about this Journal
Abstract
In this paper, a new 3 dB branch line hybrid using asymmetric spiral-shaped defected ground structure(DGS) microstrip is proposed. The proposed branch line hybrid suppresses the 2nd and the 3rd harmonic component effectively. Also a DGS $\lambda$/4 bias line that can suppress high frequency harmonics as well as low frequency intermodulation component is proposed. With the harmonic termination tuner using the proposed hybrid and the harmonic blocking bias line, the 2nd and the 3rd harmonic components of the fabricated amplifier that operated in IMT-2000 basestation transmitting band were suppressed up 25 dB and 27 dB, respectively. The proposed harmonic load-pull setup of amplifier is more easily accomplished with proposed circuits than the previous.
Keywords
DGS(Defected Ground Structure); Load-Pull; Branch Line Hybrid; Harmonic Suppression; null;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Y. C. Jeong, S. G. Jeong, J. S. Lim, and S. Nam, 'A new method to suppress harmonics using ${\lambda}/4$ bias line combined by defected ground structure in power amplifier', IEEE Microwave and Wireless Component Letters, vol. 13, no. 12, pp. 538-540, Dec. 2003   DOI   ScienceOn
2 D. Ahn, J. S. Park, C. S. 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   ScienceOn
3 J. S. Lim, C. S. Kim, J. S. Park, D. Ahn, and S. Nam, 'Design of 10 dB $90^{\circ}$ branch line coupler using microstrip line with defected ground structure', Electronics Lett., vol. 36, no. 21, pp. 1784-1785, Oct. 2000   DOI   ScienceOn
4 Jong-Sik Lim, Chul-Soo Kim, Dal Ahn, Yong-Chae Jeong, and Sangwook Nam, 'Design of low-pass filters using defected ground structure', IEEE Trans. Microwave Theory Tech., vol. 53, no. 8, pp. 2539-2545, Aug. 2005   DOI   ScienceOn
5 D. Woo, T. Lee, 'Suppression of harmonics in wilkinson power divider by using asymmetric spiral DGS', European Microwave Conference Proc., pp. 467-470, 2004
6 R. B. Stancliff, D. D. Poulin, 'Harmonic load-pull', IEEE Microwave Theory and Technique Symposium Digest, pp. 185-187, May 1979
7 김병철, '3-dB Coupler Tuner를 이용한 대신호 S-Parameter의 측정', 서강대학교 박사학위논문, 1990년
8 C. S. Kim, J. S. Park, D. Ahn, and J. B. Lim, 'A novel 1-D periodic defected ground structure for planar circuits', IEEE Microwave Guided Wave Lett., vol. 10, pp. 131-133, Apr. 2000   DOI   ScienceOn
9 J. Benedikt, R. Gaddi, P. J. Tasker, and M. Goss, 'High-power time-domain measurement system with active harmonic load-pull for high-efficiency basestation amplifier design', IEEE Trans. Microwave Theory Tech., vol. 48, no. 12, pp. 2617-2624, Dec. 2000   DOI   ScienceOn
10 J. S. Lim, C. S. Kim, Y. T. Lee, D. Ahn, and S. Nam, 'A Spiral-shaped defected ground structure waveguide', IEEE Microwave Guided Wave Letters, vol. 12, no. 9, pp. 330-332, Sep. 2002