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A simple, one-piece, flat-plate dipole antenna suitable for dual-band WLAN applications is presented. The antenna is structured to be of an L shape to fit in corners of possible wireless electronics devices. The two radiating arms of the dipole antenna are further short-circuited through a narrow shorting strip at the corners, making it possible for the antenna to be manufactured by stamping a single, flat metal plate only one time. That is, the proposed antenna in the mass-production phase can be at lower cost. In addition, by cutting an L-shaped slit at proper location in each radiating arm, a dual-band operation can easily be obtained. The design prototype of the antenna in the 2.4/5.2 GHz bands is discussed in detail in the article.