Browse > Article

Design and Fabrication of Aperture-Coupled Microstrip Patch Antenna for WLL Repeater Using Space Diversity  

한봉희 (선우 커뮤니케이션)
노광현 (썬 웨이브텍)
박노준 (원광대학교 전자공학과)
강영진 (원광대학교 전자공학과)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.27, no.4B, 2002 , pp. 388-396 More about this Journal
Abstract
In this paper, An aperture-coupled microstrip patch antenna operating at WLL frequency range(Rx : 2.3∼2.33Ghz, Tx : 2.37 ∼2.4Ghz) for WLL repeater is designed and fabricated. FR-4 epoxy substrate with 4.7 relative permittivity is inserted between feed-line and patch plane. Aperture-coupled structure is employed for consideration of bandwidth improvement and gain\`s characteristics. Air gap is arranged at each layer for bandwidth extension and radome is used as a protector in the upper patch. In this paper, both 1 port and 2 port are designed as 1$\times$2 array antenna which uses T-junction and λ$\_$g//4 transformer. Here, 1 port is used as transmitting/receiving antenna and 2 port is used as receiving antenna. Functionally independent two antennas using space diversity arrange slots between two antennas in order to be placed at the same place. As a result, we obtained a excellent isolation below -40dB and return loss is reduced by means of slots arrangement between patch and antenna.
Keywords
Citations & Related Records
연도 인용수 순위
  • Reference
1 T. Westman, K. Rikkinen, T. Ojanpera, 'DCS 1800based wireless local loop (WLL),' IEEE VTC., Mobile Technology for the Human Race., 46th , vol. 1, pp. 311-315, 1996
2 K. Fujimoto, J. R. James, Mobile Antenna Systems Handbook, 2th, Artech House., 2001
3 R. Garg, P. Bhartia, et al., Microstrip Antenna Design Handbook, Artech House, 2000
4 R. Janaswamy, D. H. Schaubert, 'Characteristic Impedance of a wide slotline on low Permittivity substrates,' IEEE Trans. MTT., vol. 34, No. 8, pp. 900-902, Aug., 1986   DOI
5 D. M. Pozar,'A reciprocity method of analysis for printed slot and slot coupled microstrip antenna,' IEEE Trans., AP, vol. 34, no. 12, pp. 1439-1446, 1986   DOI
6 J. F. Zurcher, F. E. Gardiol, Broadband Patch Antennas, Artech House, pp. 46, 1995
7 Y. Yamada, M. Kijima, 'A slender two beam base station antenna for mobile radio,' IEEE AP Society Int. Symp. vol. 1, pp. 352-355, jun. 1994
8 P. L. sullivan, D. H schaubert, 'Analysis of an aperture-coupled microstrip antenna,' IEEE Trans. AP., vol. 34, no. 8, pp. 977-984, Aug., 1986   DOI