Differential-Fed Broadband High-Gain Narrow Beam 60 GHz AiP Magnetoelectric Dipole Antenna

A novel compact, high-gain, narrow-beam, broadband magnetoelectric (ME) dipole antenna is proposed for 60 GHz antenna-in-package applications, specifically designed for ultrahigh-speed, short-range communication. Initially, an ME dipole antenna was designed utilizing a high-permittivity single substrate layer, achieving significantly high gain, narrow beam, and broad reflection bandwidth. Subsequently, a compact, low-loss substrate-integrated-waveguide-based differential power divider was developed on a low-permittivity substrate for effective integration and excitation of the proposed antenna in measurements. According to the measurement data, the antenna achieves a broad impedance bandwidth of 25.2% (54.2 GHz to 69.8 GHz) for |S₁₁| < –10 dB, with an ultra-narrow half-power beamwidth of less than 40^◦ and remarkably high realized gain that ranges from 9.64 dBi to a peak value of 14.33 dBi. Furthermore, the antenna exhibits minimal cross-polarization and a perfectly symmetrical radiation pattern, all attributed to its innovative complementary design.