Active solid-state devices (e.g. – transistors – solid-state diode – Responsive to non-electrical signal – Physical deformation
Reexamination Certificate
2006-04-25
2006-04-25
Nelms, David (Department: 2818)
Active solid-state devices (e.g., transistors, solid-state diode
Responsive to non-electrical signal
Physical deformation
C257S635000, C257S678000, C343S767000
Reexamination Certificate
active
07034373
ABSTRACT:
A multilayer switching assembly for switching high frequency signals has MEMS structures on a ceramic substrate having a top surface500, a bottom surface and a plurality of insulating layers (510,512,514). The insulating layers are separated by at least a first conductor502and a second conductor504. The first conductor502is connected to a ground potential. The second conductor504is separated from the first conductor502by one of the insulating layers. The second conductor presents a specific impedance (50 ohms) with respect to the first conductor to high frequency signals traveling on the second conductor.64 MEMS structures (e.g.540,708,716,718, 720) are mounted on the top surface. Each MEMS has an input, an output, and a control. The input connected to the second conductor. The output is connected to a coplanar waveguide (508) placed on the top surface (500). The control is connected to the bottom surface.The input to each MEMS is electrically separated from the output and from the control by a third conductor (534,550,532,530) connected to the first (grounded) conductor (502). The third conductor traverses one or more of the insulating layers thereby acting as a shield and precluding the high frequency signals presented to the input from propagating to the output and to the control. The 64 MEMS are arranged in a square 8 by 8 matrix, as well as their controls. High frequency inputs and outputs to be switched by the MEMS are placed on the periphery of the substrate to further enhance the separation of signals. Terminating resistors (50 ohms) are also placed near the periphery.
REFERENCES:
patent: 6388631 (2002-05-01), Livingston et al.
patent: 6433411 (2002-08-01), Degani et al.
patent: 6487864 (2002-12-01), Platt et al.
patent: 6849924 (2005-02-01), Allison et al.
Allison Robert C.
Lee Jar J.
Alkov Leonard A.
Nelms David
Nguyen Dao H.
Raytheon Company
Vick Karl A.
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