28 GHz Substrate-Integrated Filtering Dielectric Resonator Antenna Array

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Original languageEnglish
Pages (from-to)9900-9905
Journal / PublicationIEEE Transactions on Antennas and Propagation
Issue number10
Online published12 Jul 2022
Publication statusPublished - Oct 2022


A 28-GHz substrate-integrated filtering dielectric resonator antenna (DRA) and its 2 × 2 array are investigated. The cylindrical DRA, enclosed by two rings of air vias and metallic vias, is fabricated out of a high-permittivity substrate. It is excited by a microstrip feedline on a second substrate through four slots on the common ground plane of the antenna and feed substrates. The metallic vias and ground plane form a substrate-integrated cavity, which enhances the antenna gain in the passband by ~1 dB. A cavity mode, the DRA HEMy11δ mode, and a perturbed HEMy11δ mode are simultaneously excited, giving a wideband substrate-integrated DRA. A dual-loop structure is introduced to the DRA to provide two radiation nulls that give a filtering response. To demonstrate the idea, a 28-GHz filtering DRA and its 2 × 2 array were designed, fabricated, and measured. Reasonable agreement between the measured and simulated results is observed.

Research Area(s)

  • Antenna feeds, Antennas, Dielectric resonator antenna (DRA), Filtering, filtering antenna, Microwave antenna arrays, Microwave filters, millimeter-wave (mmWave) antenna, Slot antennas, substrate-integrated antenna, Substrates