Abstract
This article presents a simple and efficient method for the design of a self-diplexed antenna based on loading asymmetric grounding-vias. The structure consists of two antenna elements loaded with two asymmetric grounding-vias, specifying the uplink and downlink operation frequencies. By choosing the appropriate positions of the two grounding-vias, high isolation between the two antennas can be achieved. To validate the feasibility of the proposed structure, two self-diplexed antennas with different operational frequencies have been fabricated and tested. Experimental results verify the multi-functionalities of the proposed compact structure in terms of high isolation and low cross-polarization discrimination.
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