Wave transmission lines and networks – Long line elements and components – Waveguide elements and components
Reexamination Certificate
2006-01-31
2006-01-31
Takaoka, Dean (Department: 2817)
Wave transmission lines and networks
Long line elements and components
Waveguide elements and components
C333S108000
Reexamination Certificate
active
06992549
ABSTRACT:
A shutter switch is disclosed and placed in the path of a millimeter beam and is either opaque or transparent to the beam. The shutter switch comprises a number of waveguides placed adjacent to one another to intercept the beam, a portion of the beam passing through each waveguide. The dimensions of each waveguide are such that transmission of the respective portion of the beam would be cut-off if all of the waveguide walls were conductive. However, the waveguides have high impedance structures on at least two of their opposing interior walls that allow the beam at the design frequency to be transmitted through the waveguide with uniform density and minimal attenuation. At this design frequency the shutter switch is essentially transparent to the beam. Each of the high impedance structures can also be changed to a conductive surfaces such that all of the waveguide walls appear conductive and the waveguide takes on the characteristics of a metal rectangular waveguide. In this state transmission through each waveguide is cut-off and the shutter switch blocks transmission of the beam. The shutter switch can change states from blocking to transparent in microseconds or less while consuming very little power.
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M. Kim et al.,A Rectangular TEM Waveguide With Photonic Crystal Walls for Excitation of Quasioptical Amplifiers, (1999) MTI-S Archived on CD-ROM.
Koppel, Jacobs Patrick & Heybl
Rockwell Scientific Licensing LLC
Takaoka Dean
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