Recent advances in antenna design and manufacturing have enabled manufacturers to embed antennas into printed circuit boards, providing significant size and cost reductions. PCB antennas have become an essential element in today's RF mobile applications, in which size and cost are always on the chopping block. A popular PCB antenna design is the planar inverted F antenna (PIFA), which is often incorporated into the housing of today's size-constricted RF mobile devices. The PIFA is constmcted by shorting one end of a rectangular patch antenna to ground to reduce its size and then adding a feedline in the middle of the antenna.
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