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A small wideband Y‐shaped antenna is presented in this paper. A monopole of Y‐shaped with two rectangular‐shape frequency shifting strip is used to produce a compact dimension of 10 mm × 12 mm on a 1‐mm‐thick FR4 substrate. The antenna has an impedance bandwidth (measured below −10 dB from 39.57 to 44.63 GHz), a gain more than 4.9 dB, radiation efficiency of 81%, and voltage standing wave ratio (VSWR)...
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