Hexagonal ferrites for self-biasing circulators integrated in LTCC microwave modules

被引：0

作者：

Heidenreich, Manuel ^{[1
]}

Schur, Johannes ^{[2
]}

Mueller, Jens ^{[2
]}

Gitzel, Wanja ^{[3
]}

Jacob, Arne F. ^{[3
]}

Toepfer, Joerg ^{[1
]}

机构：

[1] Ernst Abbe Hsch Jena, Dept SciTec, C Zeiss Promenade 2, D-07745 Jena, Germany

[2] Tech Univ Ilmenau, D-98693 Ilmenau, Germany

[3] Hamburg Univ Technol, Inst High Frequency Technol, D-21073 Hamburg, Germany

来源：

MATERIALS RESEARCH BULLETIN | 2024年 / 178卷

关键词：

Hexagonal ferrites; Texture; Magnetic properties; Microwave properties; LTCC; SC;

D O I：

10.1016/j.materresbull.2024.112878

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Next-generation microwave LTCC modules for satellite communication systems require the integration of passive components including circulators to manipulate electromagnetic signals at high frequency. Substituted M-type hexagonal ferrites (Ba/Sr)ScxFe12-xO19 are applied as self-biasing microwave magnetic materials at frequencies of about 30 GHz. The ferrites are integrated into LTCC multilayer devices as sintered drop-in bulk samples. Sintered ferrites with preferential orientation of grains were fabricated by compaction of powders in a magnetic field and sintering at 1300 degrees C. Alternatively, screen-printed ferrite films were dried in an external magnetic field, and cofired at 900 degrees C. The magnetic texture of the ferrites is characterized using XRD, EBSD, and magnetic measurements. Integrated Y-type circulators were tested and exhibit non-reciprocal behavior. This indicates that hexagonal ferrites are promising candidates for self-biasing circulators embedded in LTCC microwave modules operating at Ka-band frequencies at around 30 GHz.

引用

页数：8