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Material Properties Influencing BaTiO‑ Dielectric Resonator Antenna at 2.5 GHz

Dielectric resonator antennas (DRAs) rely heavily on material permittivity and loss tangent to define resonance, bandwidth, and efficiency. BaTiO? is a high-permittivity ceramic, ideal for compact DRAs. HFSS simulations must incorporate accurate εr and tanδ values. The shape, feed type, and fabrication tolerances further affect antenna Q-factor and bandwidth.

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By Sonam Choephel Answered 1 year ago

Set εr ≈ 37 (high for compact size), loss tangent ≈ 0.0001 (very low for high efficiency). Model as a cylinder/rectangular prism in HFSS with these material properties. Excitation via microstrip feed or coaxial probe. Performance: high Q, narrow bandwidth (~2-3%), sensitive to fabrication tolerances due to high εr.
 

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