X波段LTCC铁氧体环形器的设计

Design of X-band LTCC Ferrite Circulator

针对微波铁氧体材料与低温金属浆料及LTCC陶瓷材料在工艺上的匹配共烧的技术难题,文中采用本征模设计方法,运用阻抗匹配技术,借助微波仿真HFSS和Auto CAD软件设计了一种X波段单Y结LTCC铁氧体环形器。器件模型在10.9~12 GHz的频率范围内出现环形功能,其带宽为1.1 GHz,插入损耗≤0.5 d B,回波损耗≥10 d B,隔离度≥13 d B,驻波比≤1.5 d B。此设计有望实现微波环形器与低温共烧陶瓷（LTCC）技术的有效结合。

To solve the technical problems of matched co-firing of microwave ferrite material,low temperature metallic slurry and LTCC ceramic material,an x-band single Y junction LTCC ferrite circulator is designed by eigen mode design method using simulation of microwave HFSS and Auto CAD software and the impedance matching technology. The device model demonstrates ring features in the 10. 9 ~ 12 GHz frequency range with a bandwidth of1. 1 GHz,an insertion loss ≤ 0. 5 d B, a return loss ≥ 10 d B, isolation degree ≥ 13 d B, standing wave ratio ≤1. 5 d B. This design is expected to effectively combine the microwave circulator with low temperature co-firing ceramic（ LTCC） technology.