TFA: FERRITE, FERROELECTRIC, AND OTHER SPECIAL MATERIALS FOR MICROWAVE CONTROL

Date & Time: Friday, June 17; 8:00 AM to 5:00 PM

Location: Long Beach Convention Center, Room 201B

Topics & Speakers:  

• LTCC compatible garnets, R. Lebourgeois, Thales R&T

• LTCC compatible dielectrics, R. Lebourgeois, Thales R&T

• Ferromagnetic loaded composites as substitute materials for ferrites to achieve microwave tunability, P. Queffelec/P. Gelin, Laboratory of Electronics and Systems of Telecommunication, Univ. of Brest

• Garnet oxide crystals for optical devices, T. Sekijima, Murata Mfg. Co., Ltd., Materials Research & Development Center

• Modeling and design of microwave devices based on ferromagnetic nanowires, A. Saib, Microwave Laboratory, Université catholique de Louvain

• Noise suppression sheet/films for digital devices and equipments, M. Yamaguchi, Tohoku University  

• World standardization of noise suppression sheets at IEC TC51/WG10, H.Ono, NEC Tokin Co.

• Tutorial overview of tunable dielectrics, S. Stemmer, Univ. of California at Santa Barbara

• BST process and Integration issues, T. Taylor, Agile Materials & Technologies, Inc.

• MBE growth of oxides, J. Levy, Univ. of Pittsburgh

Organizers:      

S. N. Stitzer, Northrop Grumman Corp.

R. York, Agile Materials & Technologies

J. D. Adam, Northrop Grumman Corp.

L. E. Davis, University of Manchester  

Sponsor:  

MTT-13: Ferrites and Ferroelectrics  

Traditionally, the study of materials whose microwave properties can be controlled externally has focused on ferrites. Recent advances in materials technology have expanded this topic so that it now covers both magnetic and dielectric materials whose microwave properties can be controlled by the application of external magnetic or electric fields. Use of these materials can provide tunability for filters, phase control for steerable antennas, or nonreciprocal behavior. This workshop will concentrate on the fabrication and application of a wide variety of these “microwave control materials”. Speakers from the both industry and academia from U.S. , Europe, and Japan will present results of their ongoing studies. Several promising techniques aimed at low-cost fabrication and improved performance of these materials have been under development in recent years. Entirely new materials fabrication techniques are being investigated, and the resulting microwave properties are being evaluated. The session will start with a discussion of the criteria for selecting ferrite materials to achieve specific requirements of operating frequency, power level, tunability, and environmental conditions such as temperature. Emphasis will be on recent developments in manufacturing methods for these materials, including traditional ceramic processing, new tape casting methods, and low temperature cofired ceramic (LTCC) techniques. The next speakers will describe new techniques for the fabrication of artificial ferrites and composite ferrite/dielectric structures. These approaches give a unique ability to control the microwave properties of these materials. We next have a presentation on the application of these types of ferrites for optical devices. The possibility of making high frequency and millimeter wave nonreciprocal devices without magnets will be explored in a presentation on the fabrication and application of magnetic nanowires embedded in nonmagnetic substrates. The application of nanotechnology promises to allow entirely new microwave materials to be developed.  Two talks will describe recent work in RF-absorbing ferrites for noise suppression in high speed digital systems, and the development of international standards for these materials. The final speakers will cover the companion “controlled material” area of ferroelectrics. These are the dielectric analogs of ferrites. An overview of the topic will be followed by presentations on recent advances in producing materials with improved microwave properties.

This tutotial extends the sequence of workshops in previous years: “Ferrite CAD and Applications” (1996), “System Requirements for Ferrite Components” and “Ferrite Measurements and Device Applications” (both in 1997), “Integration of Ferrite Devices into Future Radar, Wireless and Space Applications” (1998), “Future Trends in Ferrite Devices and Technology” (2000), “Ferrite Devices and Materials for Millimeter-Wave Applications” (2001), “Issues in Ferrites and Dielectrics for High Power Applications” (2003), “Modern Measurements of Ferrite Materials for Microwave and Millimeter Wave Devices” (2004).