USA flag logo/image

An Official Website of the United States Government

TUNABLE MILLIMETER WAVE FILTER

Award Information

Agency:
Department of Defense
Branch:
Missile Defense Agency
Award ID:
25573
Program Year/Program:
1994 / SBIR
Agency Tracking Number:
25573
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
MASSACHUSETTS TECHNOLOGICAL LABORATORY
330 Pleasant Street Belmont, MA 02178
View profile »
Woman-Owned: No
Minority-Owned: Yes
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 1994
Title: TUNABLE MILLIMETER WAVE FILTER
Agency / Branch: DOD / MDA
Contract: N/A
Award Amount: $60,000.00
 

Abstract:

In the past microwave/millimeter wave (MMW) ferrite filters have been fabricated utilizing insulating ferrite materials. We propose for the first time a degisn in which metallic magnetic films are used. Whereas conventional filter designs which include insulating ferrite materials utilize the phenomenon of ferromagnetic resonance (FMR), we propose the use of magnetic metal films in filter designs and utilize the phenomenon of ferromagnetic anti-resonance (FMAR). Preliminary studies indicate that in comparing the characteristics of the two thypes of filters the filter utilizing magnetic metal films are superior in terms of insertion loss and integrability with other planer MMW devices. Our design includes a thin magnetic metal film in the substrate layer of a microstrip line parallel to the ground plane. The characteristic impedance of the microstrip line in the absence of the metal film is 50 ohm. A dc magnetic field is applied normal to the film plane. When the magnetic film is biased away from FMAR the magnetic metal film interferes strongly with wave propagation. The characteristic impedance of the line is much smaller than 50 ohm. When the magnetic metal film is biased at FMAR the skin depth within the magnetic metal film becomes substantially greater than the film thickness. At FMAR the impedance of the line changes back to 50 ohm which matches the input signal feeder line. Therefore, design of band-pass filter can be realized in which the transmission frequency occurs at FMAR frequency with a frequency bandwidth equal to the FMAR linewidth.

Principal Investigator:

Hoton How, Phd
6174842296

Business Contact:

Small Business Information at Submission:

Massachusetts Technological
330 Pleasant Street Belmont, MA 02178

EIN/Tax ID:
DUNS: N/A
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No