Browse > Article

Design of Dual Band Wireless LAN Transmitter Using DGS  

Kang Sung-Min (Dept. of Electronics Eng., University of Incheon)
Choi Jae-Hong (Dept. of Electronics Eng., University of Incheon)
Koo Kyung-Heon (Dept. of Electronics Eng., University of Incheon)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.43, no.4, 2006 , pp. 75-80 More about this Journal
Abstract
This paper has proposed a novel dual band transmitter module which can be operating either as an amplifier or as a frequency multiplier according to the input frequency. A conventional dual band transmitter consists of separate amplifiers operating at each frequency band, but the proposed dual band module operates as an amplifier for the IEEE 802.11b/g signal, and as a frequency doubler for the IEEE 802.11a signal according to input frequency and bias voltage. In this paper, we have obtained sharp stop band characteristics by using microstrip DGS(Defected Ground Structure) to suppress the fundamental frequency of the frequency doubler as well as the second harmonic of the amplifier. From measurement result, second harmonic suppression is below -59dBc in the amplifier mode, and fundamental suppression is below -35dBc in the frequency doubler mode. And the designed module has 17.8dBm output P1dB at 2.4GHz and 10.1dBm power for 5.8GHz output, and the output power in the two modes are 0.8dB and 2.8dB larger than the module with ${\lambda}g/4$ reflector, respectively.
Keywords
Dual band transmitter; frequency doubler; DGS; wireless LAN;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 D. Ahn, J. S. Park, C. S. Kim, J. N. Kim, Y. Qian, and T. Itoh, 'A design of the low-pass filter using the novel microstrip defected ground structure, 'IEEE Transactions on Microwave Theory and Techniques, vol. 49, no. 1, Iunuary 2001   DOI   ScienceOn
2 강성민, 최재홍, 구경헌 '주파수 체배기를 이용한 이중모우드 증폭부 설계', 대한전자공학회 논문지 TC편, pp. 127-132, 제43권 제1호, 1월, 2006   과학기술학회마을
3 J. H. Jeon, J. H. Choi, S. M. Kang, T. Y. Kim, W. Choi, and K. H. Koo, 'A novel dual band transmitter for WLAN 802.11a/g applications.' 2004 IEEE MTT-S Int. Microwave Symp, Dig., vol.2, pp.1285-1288, June 2004   DOI
4 J. Geier, 'Wireless LANs,' SAMS, pp.8-32, 2002
5 A. B. Abdel-Rahman, A. K. Verna, A. B. Boutejder, and A. S. Omar, 'Control of bandstop response of Hi-Lo microstrip low pass filter using slot in gtound plane,' IEEE Transactions on Microwave Theory and Techniques, vol. 52, no. 3, March 2004   DOI   ScienceOn
6 S. Mehta, M. Zargari, S. Jen, B. Kaczynski, M. Lee, M. Mack, S. Mendis, K. Onodera, H. Samavati, W. Si, K. Singh, M. Terrovitis, D. Weber, and D. Su, 'A CMOS dual-band tri-mode chipset for IEEE 802.11a/b/g wireless LAN,' 2003 IEEE RFIC Symp, Dig., pp.427-430, June 200
7 B. Klepser, M. Punzenberger, T. Ruhlicke, and M. Zannoth, '5GHz and 2.4GHz dual-band RF-transceiver for WLAN 802.11a/b/g applications,' 2003 IEEE RFIC Symp, Dig., pp. 37-40, June 2003
8 ？Y. C. Jeong, S. G. Jeong, J. S. Lim, and S. W. Nam, 'A new method to suppress harmonics using ${\lambda}$/4 bias line combined by defected ground structure in power amplifiers,' IEEE Microwave and WIreless Components Letters, vol. 13, no. 12. December 2003   DOI   ScienceOn
9 H. Liu, Z. Li, Z. Sun, 'An improved 1-D periodic defected ground structure for microstrip line,' IEEE Microwave and Wireless Components Letters, vol. 14, no. 4, April 2004   DOI   ScienceOn