TY - JOUR
T1 - Direct Integration of Cold Sintered, Temperature-Stable Bi2Mo2O9-K2MoO4 Ceramics on Printed Circuit Boards for Satellite Navigation Antennas
AU - Wang, Dawei
AU - Siame, Beatia
AU - Zhang, Shiyu
AU - Wang, Ge
AU - Ju, Xingshen
AU - Li, Jinglei
AU - Lu, Zhilun
AU - Vardaxoglou, Yiannis
AU - Whittow, Will
AU - Cadman, Darren
AU - Sun, Shikuan
AU - Zhou, Di
AU - Song, Kaixin
AU - Reaney, Ian M.
N1 - Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2020/9
Y1 - 2020/9
N2 - 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.
AB - 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.
KW - cold sintering process
KW - microstrip patch antennas
KW - microwave dielectric ceramics
UR - https://www.scopus.com/pages/publications/85083638525
U2 - 10.1016/j.jeurceramsoc.2020.04.025
DO - 10.1016/j.jeurceramsoc.2020.04.025
M3 - 文章
AN - SCOPUS:85083638525
SN - 0955-2219
VL - 40
SP - 4029
EP - 4034
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
IS - 12
ER -