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Radial Line Slot Array Antenna for point to point applications using IEEE 802.11a

In this paper, the design and experimental verification of a linearly polarized RLSA (Radial Line Slot Array) antenna for point to point microwave link using the IEEE 802.11a band (5.725 - 5.825 GHz) is presented. A novel feeding technique based on through holes emulating a stepped conical shape using three FR-4 substrate layers with a thickness of 1.6 mm each one is proposed, allowing to obtain a relative bandwidth of 23.53% and an effective bandwidth of 1.46 GHz.