Novel ultra-low loss and low-fired Li8Mg Ti3O9+F2 microwave dielectric ceramics for resonator antenna applications

With the emergence of 5G–6G communication technology, the miniaturization and integration of electronic components are crucial. Ba3Ti4Nb4O21 (BTN) ceramics with hexagonal structures have attracted special attention due to their high dielectric constant, which shows greater application potential in communication base stations and dielectric resonators. However, its high sintering temperature and low‐quality factors also greatly limit the application field. In this paper, boric acid (H3BO3) as a dopant, was used to investigate the influence on the structure, microstructure, Raman spectrum, and microwave properties for Ba2.92Cu0.08(Zn1/3Nb2/3)2Ti2Nb4O21 (BCZTN)‐xHB (0.25≤x≤1.25 wt%) ceramics. The results reflected that H3BO3 was an effective additive, which could promote ceramic densification, accelerate grain growth and uniform distribution, and enhance its microwave performance. Among them, high densification was 93.92 ± 0.35%, and the Q × f value ∼16981 ± 340 GHz at x = 0.75, was more than 2∼3 times higher than other BTN‐based ceramics. Superior microwave dielectric properties were achieved for 0.75 wt% H3BO3‐doped BCZTN ceramic sintered at 900°C: εr∼42.35 ± 0.48, Q×f∼16981 ± 340 GHz, and τf∼40.02 ± 1.43 ppm/°C. More encouragingly, BCZTN‐0.75HB ceramic did not chemically react with Ag, which suggested that it had the potential to be a candidate material for low‐temperature co‐fired ceramics base station communication devices.

Section: Microwave Dielectric Performance Of Bcztn-xhb Ceramicsmentioning

confidence: 99%

Novel medium‐permittivity Ba_2.92Cu_0.08(Zn_1/3Nb_2/3)₂Ti₂Nb₄O₂₁ microwave dielectric ceramics with high Q × f value and densification for low‐temperature co‐fired ceramics electronic devices

Wu,

Wang,

Jing

et al. 2024

“…With the development of modern microwave technology, versatile microwave dielectric ceramics have become indispensable and have been widely utilized in various devices, including microwave resonators, filters, capacitors, antennas, and oscillators. [1][2][3][4][5] Among these applications, a substantial demand for communication equipment offering modularity, lightweight design, high integration, and excellent performance has been especially created, given the rapid advancement of the fifth generation of cellular networks (5G) with increased efficiency and effectiveness. 6,7 The emergence of low-temperature cofired ceramic (LTCC) technology provides a compelling solution to meet the demand for 5G communication systems, through the ability to co-fire dielectric ceramics with metal electrodes at temperatures below their melting point.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Low‐temperature co‐fired ceramic application of SmTaO₄ and YTaO₄ with ZnO‐B₂O₃‐SiO₂ additive

Yang,

Huang,

Zhang

et al. 2024

In this study, ZnO‐B2O3‐SiO2 (ZBS) glass was employed as a sintering facilitator, enabling low‐temperature sintering of SmTaO4 and YTaO4 ceramics. The influence of varying quantities of ZBS glass on sintering behavior and phase composition was investigated to reveal the low‐temperature sintering mechanism. ZBS glass exhibits favorable wetting behavior on the SmTaO4 and YTaO4 ceramic matrices and dramatically decreases the initial shrinkage temperature of ceramics throughout the sintering process. Composited with 20 wt. % ZBS and sintered at their optimal sintering temperature, the composite ceramics of SmTaO4 and YTaO4 possess favorable microwave dielectric properties: εr = 8.46, Q×f = 15,723 GHz, and τf = –6.68 ppm/°C (at 14.339 GHz), and εr = 4.21, Q×f = 18,939 GHz, and τf = –18.92 ppm/°C (at 15.512 GHz), respectively.

“…Increasing the number of connected devices while maintaining high data rates and low latency poses challenges for wireless communication systems. [1][2][3][4][5] Researchers have focused on multiple input multiple output (MIMO) antenna technology to satisfy the requirements of wireless communications. Amony MIMO antennas, functional dielectric patch antennas have gained significant attention because they are lightweight, have high gains, and are highly radiation efficient.…”

Section: Introductionmentioning

confidence: 99%

“…Enabled by wireless communication, electronic components, such as dielectric capacitors, dielectric resonators, filters, substrates and antennas, play crucial roles in the modern lifestyle. Increasing the number of connected devices while maintaining high data rates and low latency poses challenges for wireless communication systems 1–5 . Researchers have focused on multiple input multiple output (MIMO) antenna technology to satisfy the requirements of wireless communications.…”

Section: Introductionmentioning

confidence: 99%

High‐frequency and intrinsic dielectric properties of β‐CaSiO₃ and its application: the microstrip patch antenna

Yang,

Liu,

Wang

et al. 2023

Designing and fabricating antennas that exhibit low losses and are compact, lightweight, and highly radiation efficient are challenging in the wireless‐communication field. In this study, we simulated and fabricated microstrip patch antennas using β‐CaSiO3 low‐temperature co‐fired ceramic (LTCC) as dielectric resonator substrate. Compact ceramics that show good microwave dielectric properties (a relative dielectric constant [εr] of 6.57, high‐quality factor [Q × f] of 35 086 GHz [@14.85 GHz], and temperature coefficient of frequency [τf] of −33.56 ppm °C−1 for the optimal composition) were obtained when Li2O–CaO–B2O3–CuO glass was added to β‐CaSiO3 and sintered at 950°C. The high‐frequency properties of these composite ceramics reveal that the dielectric constant and dielectric loss are stable in the 38−58 and 70−90 GHz ranges, respectively. Furthermore, a circularly polarized antenna fabricated using a CaSiO3‐based ceramic shows a high radiation efficiency (92.04%) and gain (3.35 dBi) at a center frequency of 2.5 GHz. These β‐CaSiO3 composite ceramics offer promising prospects for high‐frequency use as well as in mobile communication applications. This study provides insight for the development of innovative antennas with new LTCC materials.