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Award ID contains: 2138741

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  1. ; (, Electronics Letters)
    This article proposes a novel compact wideband dielectric resonator antenna design that incorporates inhomogeneous material distribution in a cubic structure. Specifically, in this design, the cubic dielectric resonator antenna is divided into multiple small blocks, and a continuous genetic algorithm is employed to optimize the material property of each block in order to maximize the radiation bandwidth. As a result, a cubic dielectric resonator antenna with inhomogeneous material distributions is designed and tested. In measurement, the proposed compact dielectric resonator antenna design exhibits 64.9% impedance bandwidth (4.08–8 GHz), considerably higher than the bandwidth of the initial homogeneous dielectric resonator antenna. The maximum system gain achieved over the frequency range is 9 dB at 7 GHz, with a peak measured system efficiency of 90.6%. 
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    Free, publicly-accessible full text available December 1, 2025
  2. ; (, IEEE)
    Full Text Available 
  3. ; ; ; (, Arxiv)
    Accepted Manuscript Full Text Available
  4. ; (, IEEE)
    Full Text Available 
  5. ; (, IEEE)
  6. ; (, IEEE)
  7. ; (, IEEE)
  8. ; (, 2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI))
    This paper presents a recent development on the fundamental limits of substructure dielectric resonator antennas (DRAs). Specifically, the substructure DRAs are found to have higher resonance frequencies than the superstructure DRA, and a bounding relation on Q factor is also obtained. Numerical examples based on a ring DRA and a cylindrical DRA is examined here to demonstrate the bounding relations. 
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