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The 60 GHz band has gained great interest as an enabler for multi-Gb/s wireless links. Due to the high 60 GHz path loss (about 82 dB per 5 m), a high gain antenna is required to maintain budget requirements. Basically, phased-array antennas that provide higher gain and beam scanning capabilities are attractive for 60 GHz non-line-of-sight (NLOS) communication scenarios. This paper presents an array antenna consisted of 15 × 20 array elements for working in 60 GHz. The substrate of the antenna is FR4 epoxy with relative dielectric constant 4.4 and dielectric loss tangent 0.02. The size of the array antenna is 30 × 20. The interval of antenna elements is 13.14 mm. The HFSS's simulation results show that the peak gain, efficiency, and impedance bandwidth of the flat array antenna can achieve 28.76 dBi, 95.978%, and 20 GHz, respectively. At the same time, the array antenna also has a good directivity.
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