Abstract
A series of simulations and experimental investigations, of slotted microstrip patch antennas with a folded patch feed, are presented. The analysis includes the effects of varying the location of the feed and the shape of slot. All the investigated antennas are fed by a bandwidth-enhanced feeding method: folded patch feed. The folded patch feed is an attractive tailor-made feeding method for microstrip patch antennas, resulting in an impedance bandwidth (VSWR≤2) of more than 50%. In the study, the folded patch feed has been applied to different shapes of slots, and some of them profit with a wider impedance bandwidth over a rectangular U-slot shape. Among all the examined antennas, a trapezoidal slot microstrip patch antenna with an additional aperture and a shorting wall has an impedance bandwidth of 76.37%.
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