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Multi-band antenna elements consisting of a loop slot for lower-band and two slots for higher-band are designed for cellular base station antennas. This antenna is fed by Tri-plate line to eliminate feeding coaxial cables and connectors of feeding network circuits and its frequency bands are 0.8/0.9 GHz and 1.7/2.0 GHz. This paper discusses the design method of multi-band polarization diversity array...
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