Abstract
The near future 5G wireless/mobile communication systems may adopt 60-GHz millimeter waveband as one of main operating frequencies for its advantages of higher achievable transmission rate and wider available bandwidth, when compared with ones for 4G/3G/2G communication systems. In this paper, a novel structure design of microstrip antenna array working at the central frequency of 60-GHz waveband is proposed. The whole antenna is composed by four same branches, each one of which is formed by three linearly serialized rectangular patches. Furthermore, these four branches are uniformly arranged in circumferential direction, connected with an outside circular contour feeding line, and all pointed to the center of the circle. This kind of the design is based on the theory of half-wavelength impedance repetitiveness. As a result, the optimized microstrip antenna array can achieve the gain of 8.4 dBi at 60 GHz.
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