Wang, D. orcid.org/0000-0001-6957-2494, Siame, B., Zhang, S. et al. (11 more authors) (2020) Direct integration of cold sintered, temperature-stable Bi2Mo2O9-K2MoO4 ceramics on printed circuit boards for satellite navigation antennas. Journal of the European Ceramic Society, 40 (12). pp. 4029-4034. ISSN 0955-2219
Abstract
Bi2Mo2O9-K2MoO4 (BMO-KMO) composite ceramics with >95% theoretical density were densified by cold sintering at 150 °C. XRD, Raman, back-scattered SEM and EDX spectroscopy indicated that the BMO and KMO phases coexisted in all composites without inter-diffusion and secondary phases. Temperature coefficient of resonant frequency with near-zero value ∼ -1 ppm/°C was acheived for BMO-10%KMO with pemittivity ∼ 31 and quality factor ∼ 3,000 GHz. Cold-sintered composite ceramics were directly pressed/integrated onto a printed circuit board (PCB) using the Cu metallisation as a ground plane for the design and fabrication of a circularly polarized microstrip patch antenna suitable for satellite navigation systems which achieved efficiencies 87% at 1561 MHz (BeiDou) and 88% at 1575 MHz (GPS/Galileo). The low cost, low energy integration of temperature stable, cold sintered ceramics directly onto a PCB represents a step change in substrate fabrication technology for RF devices.
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Copyright, Publisher and Additional Information: | © 2020 Elsevier Ltd. This is an author produced version of a paper subsequently published in Journal of the European Ceramic Society. Uploaded in accordance with the publisher's self-archiving policy. Article available under the terms of the CC-BY-NC-ND licence (https://creativecommons.org/licenses/by-nc-nd/4.0/). | ||||||
Keywords: | microwave dielectric ceramics; cold sintering process; microstrip patch antennas | ||||||
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Institution: | The University of Sheffield | ||||||
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Materials Science and Engineering (Sheffield) | ||||||
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Depositing User: | Symplectic Sheffield | ||||||
Date Deposited: | 28 Apr 2020 11:55 | ||||||
Last Modified: | 17 Sep 2021 09:53 | ||||||
Status: | Published | ||||||
Publisher: | Elsevier BV | ||||||
Refereed: | Yes | ||||||
Identification Number: | https://doi.org/10.1016/j.jeurceramsoc.2020.04.025 |