High efficiency low pass filter
AssigneeHarris Corporation
InventorsWilliam D. Killen, Randy T. Pike
Life of this patent
Estimating the term…
Abstract
A printed circuit (100) for processing radio frequency signals includes a substrate (110) including substrate regions (101, 103, 105, 111, and 119) upon which the printed circuit can be placed. The circuit is a lowpass filter including a transformer line section (112), at least a first stub section (114 or 116), and transmission line sections (117) interconnecting the transformer line section with at least the first stub section. The transformer line section, the transmission line sections, and at least the first stub section are coupled to respective substrate regions that have substrate characteristics that are each independently customizable. The circuit further comprises at least one ground or ground plane (120) coupled to the substrate.
Claims22
A circuit for processing radio frequency signals, comprising:
- a substrate where said circuit can be placed, said substrate including at least one dielectric layer, said dielectric layer having a first set of substrate properties over a first region, and at least a second set of substrate properties over a second region, said second set of substrate properties being different than said first set of substrate properties;
- at least one ground coupled to said substrate;
- and,
- a two port resonant line, at least a portion of said two port resonant line coupled to said second region.
A printed circuit for processing radio frequency signals, comprising:
- a substrate upon which said circuit can be placed, said substrate including at least one dielectric layer, said dielectric layer having a first set of substrate properties over a first region, and at least a second set of substrate material properties over a second region, said second set of substrate material properties providing a different dielectric permittivity and magnetic permeability as compared to said first set of dielectric properties;
- at least one ground disposed on said substrate;
- and,
- a lowpass filter, said lowpass filter including a transformer line section on at least a portion of said first region and on at least a portion of said second region and at least a first stub section on said first region and on at least a portion of said second region.
A printed circuit for processing radio frequency signals, comprising:
- a substrate including substrate regions upon which said circuit can be placed, wherein said circuit is a lowpass filter, said lowpass filter including a transformer line section, at least a first stub section, and transmission line sections interconnecting the transformer line section with at least the first stub section;
- and
- at least one ground coupled to said substrate, wherein the transformer line section, the at least first stub section and the transmission line sections are coupled to respective substrate regions that have substrate characteristics that are each independently customizable.
Dependencies are inferred from the claim text.