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International Journal of Antennas and Propagation
Volume 2012 (2012), Article ID 307616, 7 pages
Research Article

Isolation Enhancement between Indoor Repeater Antennas with Chip Resistor Embedded FSS

Department of Wireless Communications Engineering, Kwangwoon University, 447-1, Wolgye-Dong, Nowon-Gu, Seoul 139-701, Republic of Korea

Received 7 November 2011; Accepted 29 November 2011

Academic Editor: Dau-Chyrh Chang

Copyright © 2012 Jae-Yeong Lee et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The isolation enhancement between the donor antenna and the service antenna for indoor repeater systems is presented by using a frequency-selective surface (FSS). A unit cell of the proposed FSS consists of a quarter-wavelength resonator, a chip resistor, an FR4 substrate, and a ground plane. Applying the unit cells of the proposed FSS embedded a chip resistor on the side walls of each reflector for indoor WCDMA repeater antennas and aligning them along with the cross-polarization of each antenna, the isolation is improved by about 13 dB at the WCDMA band.