Northrop Grumman Systems Corporation

Phu H Tran

Mark Kintis

Dean Tran

Ming-Jong Shiau

Yoshio Saito

Jerry T Fang

Alex Chau

George W Schreyer

Chih Chang

An LC filter structure and method for its fabrication, in which multiple shunt capacitors, multiple shunt inductors and multiple coupling inductors are printed on a metal layer formed on a thin dielectric substrate. The capacitors have first electrodes that are formed as spatially separated regions of the metal layer, and a common second electrode formed by a ground plane on the substrate. The shunt inductors are formed as spiral traces connected to the separated regions and to the ground plane, through conductive vias. The coupling inductors are similarly formed as spiral traces in the gaps between the separated regions, the ends of each coupling inductor being connected to respective adjacent regions of the metal layer.

Compact printed filters with self-connected LC resonators

An integrated getter structure and a method for its formation and installation in a circuit module enclosure (). The integrated structure includes a hydrogen getter structure () and selected quantities of a material () that is formulated to provide both a particle getter function and an RF absorber function. In one embodiment, the material () is placed in discrete quantities over the hydrogen getter structure (). In another embodiment, the hydrogen getter structure () is formed over a sheet of the material () and is provided with apertures () to expose the material ().

Integrated multi-purpose getter for radio-frequency (RF) circuit modules

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Huntington Beach, CA, United States of America

Phu H Tran