Abstract
A 1-D wideband phased array of the rectangular ring dielectric resonator antenna (RRDRA) is presented for millimeter-wave applications. By using the characteristic mode analysis, it is found that the unwanted higher order mode (HOM) of the RRDRA results in severe gain degradation and high cross polarization when the array scans. To remedy the problem, each RRDRA is loaded with a pair of silver strips. They can suppress the unwanted HOM and enable good scanning performance in a wide frequency range. To demonstrate the idea, a 1×4 phased RRDRA array was designed, fabricated and measured for the licensed millimeter-wave bands (24.25–29.5 GHz). Reasonable agreement between the measured and simulated results is observed.
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