Low loss self-biased ferrite materials for size and weight sensitive circulator applications requiring high power handling and high temperature stabil

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N65538-10-M-0091
Agency Tracking Number: N093-200-0793
Amount: $99,975.00
Phase: Phase I
Program: SBIR
Awards Year: 2010
Solicitation Year: 2009
Solicitation Topic Code: N093-200
Solicitation Number: 2009.3
Small Business Information
Metamagnetics Inc.
36 Station St, Sharon, MA, 02067
DUNS: 829728067
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Vincent Harris
 Principal Investigator
 (617) 593-5898
Business Contact
 Elaine Trudell
Title: Program Manager
Phone: (781) 636-8275
Email: trudell@metamagneticsinc.com
Research Institution
Self-biased ferrite circulator devices have been demonstrated and thus far exhibit high loss and poor isolation, making them unsuitable for practical applications. The main reason for less than satisfactory performance and high frequency of operation lie in the unacceptable quality of hexagonal ferrite materials. Metamagnetics’ researchers have developed novel materials fabrication and orientation techniques that lead to exceptionally low magnetic losses. Further, these orientation techniques have been successfully applied to substituted hexagonal ferrite materials that possess low uniaxial anisotropy, allowing self-biased devices over 2 to 20 GHz. Building upon these advances, in this proposal, the development of self-biased ferrite materials and device concepts for the 2 to 20 GHz frequencies is pursued. This program’s technical objectives can be summarized as: (i) develop low loss self-biased ferrite materials for size and weight sensitive circulator and isolator applications requiring high power handling and high temperature stability, (ii) numerically develop and optimize performance of self-biased circulator and isolator designs using material properties of advanced ferrite materials, and (iii) conduct initial experimental studies to confirm the numerical models, including self-biased or very low bias field circulation at design frequency and at elevated temperatures.

* information listed above is at the time of submission.

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