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A broadband printed π‐shaped monopole antenna is presented. The antenna is easily achieved by adding two short vertical strips (one is a feeding strip and one is a short‐circuiting strip) to a long horizontal strip, forming into a π shape with a low profile. This antenna can generate a wide bandwidth (about 29%) formed by two separate, but closely spaced, resonant modes. A prototype well suited for covering the 5.2/5.8‐GHz WLAN bands and operating as an internal antenna for a wireless device is demonstrated.
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Su et al. (2004) studied this question.
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