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In this paper, a technique of connecting the upper ground to the main ground through an extended conducting strip along the side edge of the main ground was presented. By selecting a proper length of the extended conducting strip such that the upper ground is connected to the main ground at a position where there are small excited surface current distributions. With this proposed technique, a recently reported printed monopole slot antenna capable of penta-band operation in the bar-type mobile phone to the folder-type mobile phone was applied.
Date of Conference: 5-11 July 2008