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HomeKey Engineering MaterialsKey Engineering Materials Vol. 1001Synthesis and Characterization of the Microwave...

Synthesis and Characterization of the Microwave Dielectric Properties of a (1-x) Li₃MgNbO₅–(x) Sr₃V₂O₈ Composite for Antenna Application

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Abstract:

This study investigates the fabrication of a cylindrical dielectric resonator antenna (CDRA) using ceramic microwave dielectric composites as a resonator. The composites (1-x) Li₃MgNbO₅-(x) Sr₃V₂O₈ (x=0.25-0.40) have been synthesized via the conventional solid-state reaction method, incorporating 1% B₂O₃ to lower the sintering temperature. The 0.70-0.30 composite exhibited optimal microwave dielectric properties with a dielectric constant (ε_r) of 19.20, a quality factor (Q x f) of 3738 GHz, and a temperature coefficient (τ_f)of -43 ppm/°C. These characteristics render the 0.70-0.30 composite suitable for CDRA applications. The experimentally obtained microwave dielectric parameters were used to simulate the CDRA design using the High-Frequency Structure Simulator design software. A single-feed cylindrical antenna has been fabricated using this composite material as a resonator with a radius × height of 5×6 mm², mounted on an FR4 substrate measuring close to 25×25×1.6 mm³ and Cu strip as a feed line. The simulated and experimentally measured parameters, including S11, voltage standing wave ratio, and radiation pattern, demonstrated excellent agreement, validating the composite's efficacy for antenna design.

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Periodical:

Key Engineering Materials (Volume 1001)

Pages:

33-42

DOI:

https://doi.org/10.4028/p-18ZFWm

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Online since:

December 2024

Authors:

M.A. Dinesh, Vinay Kumar, Raghvendra Kumar, Vibha Rani Gupta, V. Subramanian, Vijaylakshmi Dayal*

Keywords:

Cylindrical Dielectric Resonator Antenna (CDRA), Dielectric Permittivity, Impedance Match, Quality Factor, Return Loss, Voltage Standing Wave Ratio (VSWR)

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© 2024 Trans Tech Publications Ltd. All Rights Reserved

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