Aperture Miniaturized Magneto-electric Dipole with Dual Linearly Polarization for 28/38 GHz Millimeter-wave Applications

An aperture miniaturized magneto-electric (ME) dipole with dual linearly polarization (LP) is presented for 28/38 GHz millimeter-wave (mmW) on-chip applications. The aperture reduction is achieved by utilizing the self-similarity characteristic of fractal structure. In particular, four Minkowski-based structures are exploited to replace the conventional four rectangular metallic patches. An aperture of 0.4λ
0
× 0.4λ
0
at 33 GHz is achieved without compromising too much other excellent properties of ME dipole, such as wide impedance bandwidth, stable radiation pattern, etc. Meanwhile, in state-of-the-art antenna designs in 28/38 GHz mmW region, the majority of the studies focus on single-polarized antennas. The design of dual-polarized antenna is quite challenging. To achieve dual LP, a stripline is inserted into each of the two orthogonally placed L-shaped probes to separate the two excitation ports away from each other. The proposed antenna exhibits an overlapped 10 dB bandwidth of 45.1% ranging from 27 42 GHz and a stable gain slightly smaller than 8 dBi. A prototype based on the proposed design∼is manufactured and tested for verification. Good agreement is found between the simulated and measured results.