Stripline tapped-line hairpin filter

Claim 2

A stripline tapped-line hairpin filter comprising: a first dielectric substrate; a plurality of hairpin resonators disposed alternately on opposite surfaces of said first substrate, certain ones of said hairpin resonators located on one surface of said first substrate and certain other ones of said hairpin resonators located on the other surface of said first substrate with said first substrate separating said certain ones of said hairpin resonators from said certain other ones of said hairpin resonators and said certain ones and said certain other ones of said hairpin resonators having noncongruent adjacent edges, each hairpin resonator positioned in a spaced parallel relationship with respect to an adjacent hairpin resonator located on an opposite surface of said first substrate such that each hairpin resonator is in a parallel coupled relationship with an adjacent hairpin resonator disposed on an opposite surface of said first substrate, and the first and last hairpin resonator on said first substrate each includes an interconnected tapping member disposed upon a surface of said first substrate to which the corresponding first and last hairpin resonator is disposed and respectively extends toward opposite ends of said first substrate for respectively coupling a signal into and out of said hairpin resonators; second and third dielectric substrates each having a pair of surfaces, one surface of said second substrate located adjacent to said certain ones of said hairpin resonators and one surface of said third substrate located adjacent to said certain other ones of said hairpin resonators; and first and second groundplanes each having a pair of surfaces, one surface of said first groundplane mounted upon said second substrate other surface and one surface of said second groundplane mounted upon said third substrate other surface.

Claim 3

The stripline tapped-line filter of claim 1, wherein said certain ones of said hairpin resonators located on said one surface have a generally U-shape orientation and said certain other ones of said hairpin resonators located on said other surface of said first substrate have a reverse orientation with respect to the U-shape orientation of said certain ones of said hairpin resonators.

Claim 4

The stripline tapped-line filter of claim 1 further comprising first and second conductive plates respectively located adjacent said first and second groundplanes.

Claim 5

The stripline tapped-line filter of claim 2 wherein the dielectric constant of said first, second, and third substrates are equal.

Claim 6

The stripline tapped-line filter of claim 4 wherein said first, second, and third substrates are comprised of a fiberglass material having a dielectric constant of 2.45.

Claim 7

A stripline tapped-line filter comprising: a first dielectric substrate; a plurality of N U-shaped hairpin resonators, each being a half-wavelength open-circuited hairpin resonator, disposed alternately on first and second parallel planar surfaces of said first substrate, certain ones of said hairpin resonators located on said first surface and certain other ones of said hairpin resonators located on said second surface with said first substrate separating said certain ones of said hairpin resonators from said certain other ones of said hairpin resonators and said certain ones and said certain other ones of said hairpin resonators having noncongruent adjacent edges, each hairpin resonator positioned in a spaced parallel relationship with respect to an adjacent hairpin resonator located on an opposite one of said first and second surfaces such that each hairpin resonator is in a parallel coupled relationship with an adjacent hairpin resonator disposed on an opposite one of said first and second surfaces, each hairpin resonator including first and second spaced parallel members interconnected at one end and by a third member perpendicular to said first and second members, and the first and last hairpin resonators disposed on said first substrate each including an interconnected fourth member disposed on a respective one of said first and second surfaces to which a corresponding first and last hairpin resonator is disposed for respectively coupling a signal into and out of said hairpin resonators, said first hairpin resonator fourth member perpendicularly intersecting with said first hairpin resonator first member and extending outwardly along a corresponding one of said first and second surfaces towards one end of said first substrate and said last hairpin resonator fourth member perpendicularly intersecting with said last hairpin resonator second member and extending outwardly along a corresponding one of said first and second surfaces towards the other end of said first substrate; a second dielectric substrate having third and fourth surfaces substantially parallel to and coextensive with said first and second surfaces, said third surface located adjacent to said certain ones of said hairpin resonators; a third dielectric substrate having fifth and sixth surfaces substantially parallel to and coextensive with said first and second surfaces, said fifth surface located adjacent to said certain other ones of said hairpin resonators; a first groundplane having seventh and eighth surfaces substantially parallel to and coextensive with said third and fourth surfaces, said seventh surface mounted upon said fourth surface; and a second groundplane having ninth and tenth surfaces substantially parallel to and coextensive with said fifth and sixth surfaces, said ninth surface mounted upon said sixth surface.

Claim 8

A stripline tapped-line filter comprising: a first dielectric substrate; a plurality of N U-shaped hairpin resonators, each being a half-wavelength open-circuited hairpin resonator, disposed alternately on first and second parallel planar surfaces of said first substrate, certain ones of said hairpin resonators located on said first surface and certain other ones of said hairpin resonators located on said second surface with said first substrate separating said certain ones of said hairpin resonators from said certain other ones of said hairpin resonators and said certain ones and said certain other ones of said hairpin resonators having noncongruent adjacent edges, each hairpin resonator positioned in a spaced parallel relationship with respect to an adjacent hairpin resonator located on an opposite one of said first and second surfaces such that each hairpin resonator is in a parallel coupled relationship with an adjacent hairpin resonator disposed on an opposite one of said first and second surfaces, each hairpin resonator including first and second spaced parallel members interconnected at one end and by a third member perpendicular to said first and second members, and the first and last hairpin resonators disposed on said first substrate each including an interconnected fourth member disposed on a respective one of said first and second surfaces to which a corresponding first and last hairpin resonator is disposed for respectively coupling a signal into and out of said hairpin resonators, said first hairpin resonator fourth member perpendicularly intersecting with said first hairpin resonator first member and extending outwardly along a corresponding one of said first and second surfaces towards one end of said first substrate and said last hairpin resonator fourth member perpendicularly intersecting with said last hairpin resonator second member and extending outwardly along a corresponding one of said first and second surfaces towards the other end of said first substrate; a second dielectric substrate having third and fourth surfaces substantially parallel to and coextensive with said first and second surfaces, said third surface located adjacent to said certain ones of said hairpin resonators; a third dielectric substrate having fifth and sixth surfaces substantially parallel to and coextensive with said first and second surfaces, said fifth surface located adjacent to said certain other ones of said hairpin resonators; a first groundplane having seventh and eighth surfaces substantially parallel to and coextensive with said third and fourth surfaces, said seventh surface mounted upon said fourth surface; and a second groundplane having ninth and tenth surfaces substantially parallel to and coextensive with said fifth and sixth surfaces, said ninth surface mounted upon said sixth surface.

Claim 9

The stripline tapped-line filter of claim 6 wherein said certain other ones of said hairpin resonators located on said second surface have a reverse U-shape orientation with respect to the U-shape orientation of said certain ones of said hairpin resonators on said first surface of said first substrate.

Claim 10

The stripline tapped-line filter of claim 7 further comprising first and second conductive plates respectively located adjacent said first and second groundplanes eighth and tenth surfaces.

Claim 11

The stripline tapped-line filter of claim 8 wherein said plurality of N hairpin resonators consists of five hairpin resonators.

Claim 12

The stripline tapped-line filter of claim 7 wherein said plurality of N hairpin resonators are comprised of an electrically conductive material.

Claim 13

The stripline tapped-line filter of claim 10 wherein said plurality of N hairpin resonators are comprised of copper.

Claim 14

The stripline tapped-line filter of claim 8 wherein said first and second conductive plates are comprised of aluminum.