Filter-attenuator chip device

Details Filter-attenuator chip device Filter-attenuator chip device

2008-03-12

2010-12-14

Jones, Stephen E (Department: 2817)

Wave transmission lines and networks

Attenuators

Reexamination Certificate

active

07852171

ABSTRACT:
A microchip device is disclosed that combines a signal attenuator and a frequency filter. An embodiment of the device includes an input contact, an output contact, and a ground contact formed on the surface of a substrate. Resistive elements formed on the substrate interconnect the contacts. At least the input contact includes a gap pattern formed therein that is dimensioned and arranged such that the input contact provides a reactive impedance characteristic. The combination of the resistance of the resistive elements and the reactive impedance characteristic of the input contact are selected to provide attenuation and frequency filtering of a high frequency signal input to the microchip device. A method of manufacturing the filter-attenuator microchip device is also described.

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Abdel-Rahman et al, “Compact Stub Type Microstrip Bandpass Filter Using Defected Ground Plane,” IEEE Microwave and Wireless Components Letter, vol. 14, No. 4, Apr. 2004, pp. 136-138.
Mandal et al, “An Improved Low Pass Filter Microstrip Defected Ground Structure,” Proc. XXVIIIth Gen. Assbly. U.R.S.I., Oct. 2005.
Cho et al, “Small-Sized Quasi-Elliptic Function Microstrip Low Pass Filter Based on Defected Ground Structure and Open Stubs,” Microwave Journal, Feb. 2004, 5 pages.
Chen et al, “Lowpass Filter Design of Hilbert Curve Ring Defected Ground Structure,” Progress in Electromagnetics Research, PIER, 70, 2007, pp. 269-280.
Technical Data Sheet for “Surface Mount Chip Resistor Attenuator,” Vishay Intertechnology, Inc., Oct. 2005.

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