Microstrip Band- Reject Filter Makes Use Of Metamaterial Substrate

Jan. 16, 2007
METAMATERIAL SUBSTRATES feature dielectric behavior that can be altered by the application of a voltage. In order to understand how such materials might be used in the design of a band-reject filter, Zachary Thomas and a group of fellow researchers ...

METAMATERIAL SUBSTRATES feature dielectric behavior that can be altered by the application of a voltage. In order to understand how such materials might be used in the design of a band-reject filter, Zachary Thomas and a group of fellow researchers at the Massachusetts Institute of Technology (MIT) in Cambridge, MA experimented with left-handed metamaterials (LHMs) to enhance the performance of a stopband filter created by the addition of open-circuit shunt stubs to microstrip lines. The stubs were selected for a quarter wavelength at the design frequency of 6 GHz.

Measurements showed the the performance of a stopband filter on metamaterial was a marked improvement compared to a similar design realized on standard dielectric substrate material as well as compared to a form of hybrid dielectric-based filter on metamaterials. See "Enhanced Microstrip Stopband Filter Using A Metamaterial Substrate," Microwave and Optical Technology Letters, August 2006, Vol. 48, No 8, p. 1522.

About the Author

Jack Browne | Technical Contributor

Jack Browne, Technical Contributor, has worked in technical publishing for over 30 years. He managed the content and production of three technical journals while at the American Institute of Physics, including Medical Physics and the Journal of Vacuum Science & Technology. He has been a Publisher and Editor for Penton Media, started the firm’s Wireless Symposium & Exhibition trade show in 1993, and currently serves as Technical Contributor for that company's Microwaves & RF magazine. Browne, who holds a BS in Mathematics from City College of New York and BA degrees in English and Philosophy from Fordham University, is a member of the IEEE.

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