Self-Biased Y-Junction Circulator

0140177为生产第一代自偏置铁氧体环行器器件，该公司提出了一项双重研究计划。在第一个研究计划中，他开发了制备铁氧体/介电复合材料的技术，该材料由介电浆料、填充材料和定向六角铁氧体颗粒组成。在第二阶段的研究计划中，他将利用复合材料的特殊性能来设计和测试1至20 GHz的循环装置。他预计，自偏置环行器的性能在工作频带、插入损耗和隔离度方面与使用尖晶石和石榴石铁氧体的环行器相似。虽然传统的循环器设备的特点是所谓的“冰球”设计，但他的设计将利用众所周知的厚膜玻璃丝网印刷技术将循环器设备集成到半导体/介质基板中。此外，本文提出的自偏置六角铁氧体环行器将消除在大多数情况下占据微波电路板中相当大空间的永久磁体。环行器尺寸的减小转化为制造成本的降低和整个微波电路板性能的提高。研究内容包括六角铁氧体和玻璃介质浆料复合材料的制备、取向铁氧体复合材料的表征、带状线/微带环行器的制作、环行器的测试以及复合材料的微波和静态性能的模拟。

0140177VittoriaThe proposes a two-fold research plan for the purpose of producing the first generation of self-biased ferrite circulator devices. In the first research plan he develops techniques to prepare composite ferrite/dielectric materials consisting of dielectric paste filling material and oriented hexaferrite particles. In the second phase of the research plan, he will utilize the special properties of the composites to design and test circulation devices from 1 to 20 GHz. He anticipates that the performance of the self-biased circulators to behave similarly to circulators using spinel and garnet ferrites in terms of frequency bandwidth of operation, insertion loss and isolation. Whereas the traditional circulator devices is characterized by the so-called "puck" design, his design will integrate the circulator devices into a semiconductor/dielectric substrate utilizing the well known thick film glass on screen print technolagies. In addition, the self-biased hexaferrite circulators proposed here will do away with permanent magnets which in most cases occupy considerable space in a microwave circuit board. Reduction in circulator size translates into reduction of fabrication costs and increased efficiency in the performance of the overall microwave circuit board. The research program comprises of preparation of composites of hexaferrites and dielectric paste on glass, characterization of the oriented ferrite composite materials, fabrication of stripline/microstrip circulators, testing of the circulators and modeling of the microwave and static properties of the composite materials.