Abstract
AbstractA broadband directional endfire printed antenna is proposed with a simple unbalanced feed, compact size, stable gain, and high front to back ratio (F/B). The antenna consists of a microstrip driven with U‐shaped ground and reflector elements to reduce the antenna size. The reflector increases the directivity and F/B in the lower frequency band. The parasitic element, which is located close to the driven element and also acts like director, enhances the bandwidth (BW) and gain in the upper frequency band. Prototype of the proposed antenna is fabricated with antenna size of 0.48λo × 0.35λo. Experiment results demonstrate that the proposed antenna provides 62.6% (1.606‐3.07 GHz) BW with stable gain (5‐6.8 dBi) and min F/B of 15 dB. The proposed endfire antenna is a good candidate for wireless applications in 2G, 3G, 4G, Wi‐Fi, and lower WiMAX bands.
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