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Wideband frequency tunability of CaCu 3 Ti 4 O 12 ‐based dielectric resonator antennas via the addition of glass
Author(s) -
Ab Rahman Mohd Fariz,
Ain Mohd Fadzil,
Mohamad Hasmaliza,
Mohamed Julie Juliewatty,
Hassan Siti Roshayu,
Ahmad Zainal Arifin
Publication year - 2020
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.13530
Subject(s) - materials science , wideband , dielectric , network analyzer (electrical) , ceramic , resonator , composite material , pellets , dielectric resonator , porosity , composite number , analytical chemistry (journal) , optoelectronics , optics , electronic engineering , physics , engineering , chemistry , chromatography
In this study, DRAs produced using CaCu 3 Ti 4 O 12 (CCTO) as a high dielectric material ( ε r ) was added with BaO–SrO–Nb 2 O 5 –B 2 O 3 –SiO 2 (BSNBS) glass for possible tunability in a wideband frequency range. BSNBS glass (0.01‐1 wt%) was mixed with CCTO powders (calcined) and compacted at 250 MPa into mixed‐powder pellets. All the green body samples were then sintered at 1040°C for 10 hours. The wideband frequency tunability, measured using a network analyzer, showed that the addition of ≤0.05 wt% BSNBS glass decreased the resonance frequency from 9.51 to 9.33 GHz; later, the values increased to 9.89 GHz when BSNBS content was > 0.05 wt%. The ε r of each sample was around 11‐36 when measured at 9.5‐11.8 GHz. The radiation pattern of CCTO for each sample that had been set up as a DRA radiated the signal equally or nearly identical to each other. Furthermore, the addition of BSNBS glass produced micrographs with finer grains, improved the density and reduced the porosity of the composite. Therefore, the addition of the BSNBS glass is a successful aid in the wideband frequency tunability of pure CCTO‐based ceramics when used as DRAs.