28 GHz Substrate-Integrated Filtering Dielectric Resonator Antenna Array

Yan-Ting Liu, Kwok Wa Leung*

*Corresponding author for this work

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

40 Citations (Scopus)

Abstract

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.
Original languageEnglish
Pages (from-to)9900-9905
JournalIEEE Transactions on Antennas and Propagation
Volume70
Issue number10
Online published12 Jul 2022
DOIs
Publication statusPublished - Oct 2022

Funding

This work was supported in part by the GRF Grant from the Research Grants Council of Hong Kong Special Administrative Region, China, under Project CityU 11218020; and in part by the National Natural Science Foundation of China under Project 62101257.

Research Keywords

  • 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

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