Monolithic ceramic filter with bandstop function

Claim 2

A filter comprising: dielectric means comprised of a dielectric material having top and bottom surfaces, said dielectric means further having at least two holes, including a first hole and a second hole with no intervening holes therebetween, extending from the top surface toward the bottom surface thereof and spatially disposed at a predetermined distance from one another, said dielectric means selectively covered with a conductive material to provide a transmission line resonator for each of said at least two holes; input electrode means comprised of a conductive material coupled to the dielectric means at a predetermined distance from said first hole in dielectric means; output electrode means comprised of a conductive material coupled to the dielectric means at a predetermined distance from said second hole in the dielectric means; and plating line means comprised of a conductive material contiguously disposed on the dielectric means adjacent said first hole and said second hole and coupled thereto to provide a bandstop filter function.

Claim 3

A filter, according to claim 1, wherein said at least two holes include a surface covered with conductive plating.

Claim 4

A filter, according to claim 1, wherein said dielectric means includes portions of conductive plating surrounding said at least two holes.

Claim 5

A filter, according to claim 3, wherein said plating line means is disposed a predetermined distances from said portions of conductive plating.

Claim 6

A filter, according to claim 1, wherein said input electrode means is part of said plating line means.

Claim 7

A filter, according to claim 1, wherein said output electrode means is part of said plating line means.

Claim 8

A filter, according to claim 1, wherein said plating line means includes at least one impedance inverter means.

Claim 9

A filter, according to claim 1, wherein said plating line means includes at least one quarter wavelength transmission line.

Claim 10

A filter comprising: dielectric means comprised of a dielectric material having top and bottom surfaces, said dielectric means further having at least three holes extending from the top surface toward the bottom surface thereof, said three holes including: a first hole and a second hole wherein the first hole is spatially disposed at a predetermined distance from the second hole without any intervening holes therebetween, and a third hole spatially disposed at a predetermined distance from the second hole; conductive material selectively covering said dielectric means to provide a transmission line resonator for each of said at least three holes; electrode means comprised of a conductive material coupled to the dielectric means at a predetermined distance from said first hole of said first, second and third holes; electrode means comprised of a conductive material coupled to the dielectric means at a predetermined distance from said third hole of said first, second and third holes; and impedance inverter plating means comprised of a conductive material contiguously disposed on the dielectric means adjacent said first hole and said second hole and coupled thereto to provide a bandstop filter function.

Claim 11

A filter comprising: dielectric means comprised of a dielectric material having top and bottom surfaces, said dielectric means further having at least three holes extending from the top surface toward the bottom surface thereof, said three holes including: a first hole and a second hole wherein the first hole is spatially disposed at a predetermined distance from the second hole without any intervening holes therebetween, and a third hole spatially disposed at a predetermined distance from the second hole; conductive material selectively covering said dielectric means to provide a transmission line resonator for each of said at least three holes; electrode means comprised of a conductive material coupled to the dielectric means at a predetermined distance from said first hole of said first, second and third holes; electrode means comprised of a conductive material coupled to the dielectric means at a predetermined distance from said third hole of said first, second and third holes; and impedance inverter plating means comprised of a conductive material contiguously disposed on the dielectric means adjacent said first hole and said second hole and coupled thereto to provide a bandstop filter function.

Claim 12

A filter, according to claim 9, wherein said impedance inverter plating means includes at least on quarter wave length transmission line.

Claim 13

A filter, according to claim 10, wherein said quarter wave length transmission line includes a non-lineal conductive plating segment.

Claim 14

A filter, according to claim 9, wherein said third hole provides a bandpass filter function within the filter.

Claim 15

An RF transceiver comprising: a transmitter; a receiver; an antenna; first filter means coupled between said transmitter and said antenna; second filter means coupled between said receiver and said antenna; at least one of said first filter means and said second filter means including: dielectric means comprised of a dielectric material having top and bottom surfaces, said dielectric means further having at least two holes, including a first hole and a second hole with no intervening holes therebetween, extending from the top surface toward the bottom surface thereof and spatially disposed at a predetermined distance from one another, said dielectric means selectively covered with a conductive material to provide a transmission line resonator for each of said at least two holes, input electrode means comprised of a conductive material coupled to the dielectric means at a predetermined distance from said first hole in the dielectric means, output electrode means comprised of a conductive material coupled to the dielectric means at a predetermined distance from said second hole in the dielectric means, and plating line means comprised of a conductive material contiguously disposed on the dielectric means adjacent said first hole and said second hole and coupled thereto to provide a bandstop filter function.

Claim 16

An RF transceiver comprising: a transmitter; a receiver; an antenna; first filter means coupled between said transmitter and said antenna; second filter means coupled between said receiver and said antenna; at least one of said first filter means and said second filter means including: dielectric means comprised of a dielectric material having top and bottom surfaces, said dielectric means further having at least two holes, including a first hole and a second hole with no intervening holes therebetween, extending from the top surface toward the bottom surface thereof and spatially disposed at a predetermined distance from one another, said dielectric means selectively covered with a conductive material to provide a transmission line resonator for each of said at least two holes, input electrode means comprised of a conductive material coupled to the dielectric means at a predetermined distance from said first hole in the dielectric means, output electrode means comprised of a conductive material coupled to the dielectric means at a predetermined distance from said second hole in the dielectric means, and plating line means comprised of a conductive material contiguously disposed on the dielectric means adjacent said first hole and said second hole and coupled thereto to provide a bandstop filter function.

Claim 17

A duplexer for coupling a transceiver to an antenna, comprising: first filter means, having an input stage coupled to the antenna and an output stage coupled to the transceiver, for selecting signals applied thereto; said first filter means further comprising: dielectric means comprised of a dielectric material having top and bottom surfaces, said dielectric means further having at least two holes, including a first hole and a second hole with no intervening holes therebetween, extending from the top surface toward the bottom surface thereof and spatially disposed at a predetermined distance from one another, said dielectric means selectively covered with a conductive material to provide a transmission line resonator for each of said at least two holes; input electrode means comprised of a conductive material coupled to the dielectric means at a predetermined distance from said first hole in dielectric means; output electrode means comprised of a conductive material coupled to the dielectric means at a predetermined distance from said second hole in the dielectric means; and plating line means comprised of a conductive material contiguously disposed on the dielectric means adjacent said first hole and said second hole and coupled thereto to provide a bandstop filter function; and second filter means, having an input stage coupled to the transceiver and an output stage coupled to the antenna, for selecting signals applied thereto.

Claim 18

A duplexer for coupling a transceiver to an antenna, comprising: first filter means, having an input stage coupled to the antenna and an output stage coupled to the transceiver, for selecting signals applied thereto; said first filter means further comprising: dielectric means comprised of a dielectric material having top and bottom surfaces, said dielectric means further having at least two holes, including a first hole and a second hole with no intervening holes therebetween, extending from the top surface toward the bottom surface thereof and spatially disposed at a predetermined distance from one another, said dielectric means selectively covered with a conductive material to provide a transmission line resonator for each of said at least two holes; input electrode means comprised of a conductive material coupled to the dielectric means at a predetermined distance from said first hole in dielectric means; output electrode means comprised of a conductive material coupled to the dielectric means at a predetermined distance from said second hole in the dielectric means; and plating line means comprised of a conductive material contiguously disposed on the dielectric means adjacent said first hole and said second hole and coupled thereto to provide a bandstop filter function; and second filter means, having an input stage coupled to the transceiver and an output stage coupled to the antenna, for selecting signals applied thereto.

Claim 19

A duplexer for coupling a transceiver to an antenna, comprising: first filter means, having an input stage coupled to the antenna and an output stage coupled to the transceiver, for selecting signals applied thereto; and second filter means, having an input stage coupled to the transceiver and an output stage coupled to the antenna, for selecting signals applied thereto; said first filter means further comprising: dielectric means comprised of a dielectric material having top and bottom surfaces, said dielectric means further having at least two holes, including a first hole and a second hole with no intervening holes therebetween, extending from the top surface toward the bottom surface thereof and spatially disposed at a predetermined distance from one another, said dielectric means selectively covered with a conductive material to provide a transmission line resonator for each of said at least two holes; input electrode means comprised of a conductive material coupled to the dielectric means at a predetermined distance from said first hole in dielectric means; output electrode means comprised of a conductive material coupled to the dielectric means at a predetermined distance from said second hole in the dielectric means; and plating line means comprised of a conductive material contiguously disposed on the dielectric means adjacent said first hole and said second hole and coupled thereto to provide a bandstop filter function.

Claim 20

A duplexer for coupling a transceiver to an antenna, comprising: first filter means, having an input stage coupled to the antenna and an output stage coupled to the transceiver, for selecting signals applied thereto; and second filter means, having an input stage coupled to the transceiver and an output stage coupled to the antenna, for selecting signals applied thereto; said first filter means further comprising: dielectric means comprised of a dielectric material having top and bottom surfaces, said dielectric means further having at least two holes, including a first hole and a second hole with no intervening holes therebetween, extending from the top surface toward the bottom surface thereof and spatially disposed at a predetermined distance from one another, said dielectric means selectively covered with a conductive material to provide a transmission line resonator for each of said at least two holes; input electrode means comprised of a conductive material coupled to the dielectric means at a predetermined distance from said first hole in dielectric means; output electrode means comprised of a conductive material coupled to the dielectric means at a predetermined distance from said second hole in the dielectric means; and plating line means comprised of a conductive material contiguously disposed on the dielectric means adjacent said first hole and said second hole and coupled thereto to provide a bandstop filter function.

Claim 21

A bandstop filter comprising: dielectric means comprised of a dielectric material having top and bottom surfaces, said dielectric means further having at least two holes, including a first hole and a second hole with no intervening holes therebetween, extending from the top surface toward the bottom surface thereof and spatially disposed at a predetermined distance from one another, said dielectric means selectively covered with a conductive material to provide a transmission line resonator for each of said at least two holes; input electrode means comprised of a conductive material coupled to the dielectric means at a predetermined distance from said first hole in dielectric means; output electrode means comprised of a conductive material coupled to the dielectric means at a predetermined distance from said second hole in the dielectric means; and plating line means comprised of a conductive material contiguously disposed on the dielectric means adjacent said first hole and said second hole and coupled thereto to provide a bandstop filter function.

Claim 22

A bandstop filter comprising: dielectric means comprised of a dielectric material having top and bottom surfaces, said dielectric means further having at least two holes, including a first hole and a second hole with no intervening holes therebetween, extending from the top surface toward the bottom surface thereof and spatially disposed at a predetermined distance from one another, said dielectric means selectively covered with a conductive material to provide a transmission line resonator for each of said at least two holes; input electrode means comprised of a conductive material coupled to the dielectric means at a predetermined distance from said first hole in dielectric means; output electrode means comprised of a conductive material coupled to the dielectric means at a predetermined distance from said second hole in the dielectric means; and plating line means comprised of a conductive material contiguously disposed on the dielectric means adjacent said first hole and said second hole and coupled thereto to provide a bandstop filter function.