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The planar inverted –F antenna is popular for portable wireless devices because of its low profile, small size, and built-in structure [1]. The other major advantages are easy fabrication, low manufacturing cost, and simple structure [2]. Also, PIFA’s inherent bandwidth is higher than the bandwidth of the conventional patch antenna (since a thick air substrate is used).
The basic PIFA (a “grounded” patch antenna - l/4 patch length instead of the conventional l/2) consists of a ground plane, a top plate element, a feed wire feeding the resonating top plate, and a DC-shorting plate that is connecting the ground and the top plate at one end of the resonating patch. |
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basic_pifa.zip
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Potential antenna designs for a wearable antenna at 440 MHz
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发表于 2009-3-22 22:17:38
