JOHN W MORRIS
Mental Health in Billerica, MA
License number
Massachusetts 323
Issued Date
Jan 8, 1992
Expiration Date
Dec 31, 2016
Type
Health Officer
Address
Address
Billerica, MA 01821
Professional information
Mechanically Rotated Doppler Frequency Shifter
US Patent:
5007721, Apr 16, 1991
Filed:
May 25, 1990
Appl. No.:
7/529032
Inventors:
John B. Morris - Billerica MA
Uve H. W. Lammers - Chelmsford MA
Richard A. Marr - Billerica MA
Uve H. W. Lammers - Chelmsford MA
Richard A. Marr - Billerica MA
Assignee:
The United States of America as represented by the Secretary of the Air
Force - Washington DC
Force - Washington DC
International Classification:
G02B 510, G02B 718, G02B 2700, H01Q 1516
US Classification:
350486
Abstract:
A mechanical Doppler shifting device for a high frequency radiated beam comprises a rotating helical reflector having its axis of rotation parallel to the beam and a plane stationary mirror mounted parallel to the axis. The helix has a smooth reflective surface which is at a 45 degree slope with respect to the axis so that the distance to the surface from the source of the beam varies with the rotation of the helix. The beam is reflected from the helix to the plane stationary reflector and back upon itself to the source at a Doppler shifted frequency. Also disclosed is a system using 2 helical reflectors, the second being a mirror image of the first and being oppositely rotated synchronously therewith for reflecting the beam to a receiver spaced from the source of the beam.