Back to results
US 6,617,942 B1Granted
Hybrid multi-pole gain zero filter element
AssigneeNorthrop Grumman Corporation
InventorsLynette M. Jones, Patrick J. Knowles
Life of this patent
Estimating the term…
Abstract
A hybrid filter element includes an impedance transformer and a phase cancellation loop having a first portion and a second portion is disclosed. The first and second portions are designed to provide a phase difference between the two portions of about 180° at a mid-band frequency. The first portion forms part of the impedance transformer and is typically smaller than the second portion. The first and second portions can be designed to have either an equal power split or an unequal power split between the portions.
Claims19
A hybrid filter element, comprising:
- an impedance transform;
- comprises end portions that are located at opposite ends of a first portion and
- a phase cancellation loop including said first portion and a second portion, wherein said first and second portions are designed to provide a phase difference between said first and second portions of about 180° at a mid-band frequency, and wherein the first portion forms part of the impedance transformer.
A hybrid filter element, comprising:
- an impedance transformer comprising end portions that are located at opposite ends of a first portion;
- and
- a second portion having respective ends connected to the ends of said first portion, wherein said first and second portions are designed to provide a phase difference between said first and second portions of about 180° at a mid-band frequency.
Dependencies are inferred from the claim text.