A High Gain Millimeter-Wave Magnetoelectric Dipole Antenna Array Fed by Filtering Divider

In this paper, a filtering divider feeding network-integrated millimeter-wave magneto-electric (ME) dipole antenna array is proposed. A 5-order all-resonator 1-to-4 filtering power divider is used to feed four air-filled cavities. Each cavity can operate as a 1-to-4 power divider to excite a four ME dipole unit subarray. Hence, 16 ME dipole antennas can be excited by the filtering divider feeding network in the same phase. The simulated results show that the proposed antenna array can achieve a -10 dB impedance matched bandwidth of 26.9 GHz-30.7 GHz, which is the same as the optimized passband of the filtering divider. The maximum gain of the antenna array is 22.5 dB, and the gain variation is below 1.5 dB over the operating band. Moreover, the radiation efficiencies are around 95% and stable radiation patterns are confirmed as well. The high integrated antenna array and filtering network realizes the miniaturization of the millimeter wave antenna system. Due to the advantages of high efficiency, compact size, filtering function, and high directivity, the proposed antenna array can find possible applications in the emerging millimeter-wave wireless communications.