Insular waveguide ring resonator filter

Claim 2

An insular waveguide band reject ring resonator filter for use in the frequency range from about 1 GHz to about 1,000 GHz comprising a conductive image plane, a first length of elongated high permittivity dielectric waveguide of finite cross section arranged in a closed ring form and disposed adjacent to said conductive image plane, a second length of elongated high permittivity dielectric waveguide of finite cross section disposed adjacent to said conductive image plane and spaced from first length of waveguide to provide a coupling region therebetween, and a thin film of synthetic organic resin disposed between and secured to said conductive image plane and said lengths of waveguide and extending laterally thereof, said thin film being low loss in character and having a low permittivity compared with that of said lengths of waveguide, said second length of waveguide having an inlet port at one end of said coupling region and spaced away from said first length of waveguide a distance substantially greater than the distance between said lengths of waveguide in said coupling region, said second length of waveguide having an outlet port at the other end of said coupling region and spaced from said first length of waveguide a distance substantially greater than the distance between said lengths of waveguide in said coupling region, said filter rejecting and blocking passage of energy from said inlet port to said outlet port when the means periphery of said first length of waveguide is an integral multiple of the guide wavelength of the energy in said first length of waveguide, said filter permitting passage of energy from said inlet port to said outlet port when the mean periphery of said first length of waveguide is other than an integral multiple of the guide wavelength of the energy in said first length of waveguide.

Claim 3

The insular waveguide band reject ring resonator filter set forth in claim 1, wherein said second length of waveguide in said coupling region is rectilinear in shape.

Claim 4

The insular waveguide band reject ring resonator filter set forth in claim 1, wherein said second length of waveguide in said coupling region is curved and parallel to said first length of waveguide.

Claim 5

The insular waveguide band reject ring resonator filter set forth in claim 1, wherein the ratio between the spacing of said first and second lengths of waveguide in said coupling region and the square root of the cross-sectional area of said first and second lengths of dielectric waveguide is in the range from about 0.1 to about 0.8.

Claim 6

The insular waveguide band reject ring resonator filter set forth in claim 1, wherein said first and second lengths of waveguide are rectangular in cross section, the ratio between the thickness of said thin film and the height of said first and second lengths of dielectric waveguide is in the range from about 0.02 to about 1.0, the ratio between the spacing of said lengths of waveguide in said coupling region and the widths of said first and second lengths of dielectric waveguides is in the range from about 0.1 to about 0.8.

Claim 7

The insular waveguide band reject ring resonator filter set forth in claim 1, wherein the mean circumference of said first length of waveguide in closed ring form is at least ten times the guide wavelength of the electromagnetic energy in said first length of waveguide, thereby to prevent radiation from the curves of said first lengths of waveguide in closed ring form.

Claim 8

The insular waveguide band reject ring resonator filter set forth in claim 1, wherein said first length of waveguide is in a closed circular form.

Claim 9

An insular waveguide band pass ring resonator filter for use in the frequency range from about 1 GHz to about 1,000 GHz comprising a conductive image plane, a first length of elongated high permittivity dielectric waveguide of finite cross section arranged in a closed ring form and disposed adjacent to said conductive image plane, a second length of elongated high permittivity dielectric waveguide of finite cross section disposed adjacent to said conductive image plane and spaced from said first length of waveguide to provide a first coupling region therebetween, a third length of elongated high permittivity dielectric waveguide of finite cross section disposed adjacent to said conductive image plane and spaced from said first length of waveguide on the side thereof opposite said second length of waveguide to provide a second coupling region therebetween, and a thin film of synthetic organic resin disposed between and secured to said conductive image plane and said lengths of waveguide and extending laterally thereof, said thin film being low loss in character and having a low permittivity compared with that of said lengths of waveguide, said second length of waveguide having an inlet port at one end of said first coupling region and a first outlet port at the other end of said first coupling region and spaced from said first length of waveguide a distance substantially greater than the distance between said first and second lengths of waveguide in said first coupling region, said third length of waveguide having a termination at the end of said second coupling region adjacent said first outlet port and a second outlet port at the other end of said second coupling region and spaced from said first length of waveguide a distance greater than the distance between said first and third lengths of waveguide in said second coupling region, said band pass filter passing energy injected into said inlet port from said second length of waveguide through said first length of waveguide and said third length of waveguide and out of said second outlet port when the mean periphery of said first length of waveguide is an integral multiple of the guide wavelength of the energy in said first length of waveguide, said band pass filter passing energy injected into said inlet port from said second length of waveguide and out of said first outlet port when the mean periphery of said first length of waveguide is other than an integral multiple of the guide wavelength of the energy in said first length of waveguide.

Claim 10

An insular waveguide band pass ring resonator filter for use in the frequency range from about 1 GHz to about 1,000 GHz comprising a conductive image plane, a first length of elongated high permittivity dielectric waveguide of finite cross section arranged in a closed ring form and disposed adjacent to said conductive image plane, a second length of elongated high permittivity dielectric waveguide of finite cross section disposed adjacent to said conductive image plane and spaced from said first length of waveguide to provide a first coupling region therebetween, a third length of elongated high permittivity dielectric waveguide of finite cross section disposed adjacent to said conductive image plane and spaced from said first length of waveguide on the side thereof opposite said second length of waveguide to provide a second coupling region therebetween, and a thin film of synthetic organic resin disposed between and secured to said conductive image plane and said lengths of waveguide and extending laterally thereof, said thin film being low loss in character and having a low permittivity compared with that of said lengths of waveguide, said second length of waveguide having an inlet port at one end of said first coupling region and a first outlet port at the other end of said first coupling region and spaced from said first length of waveguide a distance substantially greater than the distance between said first and second lengths of waveguide in said first coupling region, said third length of waveguide having a termination at the end of said second coupling region adjacent said first outlet port and a second outlet port at the other end of said second coupling region and spaced from said first length of waveguide a distance greater than the distance between said first and third lengths of waveguide in said second coupling region, said band pass filter passing energy injected into said inlet port from said second length of waveguide through said first length of waveguide and said third length of waveguide and out of said second outlet port when the mean periphery of said first length of waveguide is an integral multiple of the guide wavelength of the energy in said first length of waveguide, said band pass filter passing energy injected into said inlet port from said second length of waveguide and out of said first outlet port when the mean periphery of said first length of waveguide is other than an integral multiple of the guide wavelength of the energy in said first length of waveguide.

Claim 11

The insular waveguide band pass ring resonator filter set forth in claim 8, wherein said second and third lengths of waveguide in said coupling region are rectilinear.

Claim 12

The insular waveguide band pass ring resonator filter set forth in claim 8, wherein said second and third lengths of waveguide in said coupling region are curved and arranged essentially parallel to the adjacent portions of said first length of waveguide.

Claim 13

The insular waveguide band pass ring resonator filter set forth in claim 8, wherein the ratio between the spacing of said second and third lengths of waveguide in said coupling region and the square root of the cross-sectional area of said lengths of waveguide is in the range from about 0.1 to about 0.8.

Claim 14

The insular waveguide band pass ring resonator filter set forth in claim 8, wherein said first and second and third lengths of waveguide are rectangular in cross section, the ratio between the thickness of said thin film and the thickness of said waveguides being in the range from about 0.02 to about 1.0, the ratio between the spacing of said lengths of waveguide in said coupling regions and the widths of said waveguides is in the range from about 0.1 to about 0.8.

Claim 15

The insular waveguide band pass ring resonator filter set forth in claim 8, wherein said first length of waveguide is in a closed circular form.

Claim 16

An insular waveguide band pass ring resonator filter for use in the frequency range from about 1 GHz to about 1,000 GHz comprising a conductive image plane, a plurality of first lengths of elongated high permittivity dielectric waveguide of finite cross section each arranged in a closed ring form and disposed adjacent to each other and to said conductive image plane, said first lengths of dielectric waveguide being arranged in general longitudinal relation with adjacent sections of adjacent rings being spaced apart to provide first coupling regions therebetween, a second length of elongated high permittivity dielectric waveguide of finite cross section disposed adjacent to said conductive image plane and spaced from one of the endmost ones of said first lengths of waveguide to provide a second coupling region therebetween, a third length of elongated high permittivity dielectric waveguide of finite cross section disposed adjacent to said conductive image plane and spaced from the other endmost one of said first lengths of waveguide to provide a third coupling region therebetween, and a thin film of synthetic organic resin disposed between and secured to said conductive image plane and said lengths of waveguide and extending laterally thereof, said thin film being low loss in character and having a low permittivity compared with that of said lengths of waveguide, said second length of waveguide having an inlet port at one end of said second coupling region and a first outlet port at the other end of said second coupling region and spaced from the adjacent first length of waveguide a distance substantially greater than the distance between said first and second lengths of waveguide in said second coupling region, said third length of waveguide having a termination at one end of said third coupling region and a second outlet port at the other end of said third coupling region and spaced from the adjacent first length of waveguide a distance greater than the distance between said first and third lengths of waveguide in said third coupling region, said band pass filter passing energy injected into said inlet port from said second length of waveguide through the first lengths of waveguide and said third length of waveguide and out of said second outlet port where the mean periphery of said first lengths of waveguide is an integral multiple of the guide wavelength of the energy in said first lengths of waveguide, said band pass filter passing energy injected into said inlet port from said second length of waveguide and out of said first outlet port when the mean periphery of said first lengths of waveguide is other than an integral multiple of the guide wavelength of the energy in said first lengths of waveguide.

Claim 17

An insular waveguide band pass ring resonator filter for use in the frequency range from about 1 GHz to about 1,000 GHz comprising a conductive image plane, a plurality of first lengths of elongated high permittivity dielectric waveguide of finite cross section each arranged in a closed ring form and disposed adjacent to each other and to said conductive image plane, said first lengths of dielectric waveguide being arranged in general longitudinal relation with adjacent sections of adjacent rings being spaced apart to provide first coupling regions therebetween, a second length of elongated high permittivity dielectric waveguide of finite cross section disposed adjacent to said conductive image plane and spaced from one of the endmost ones of said first lengths of waveguide to provide a second coupling region therebetween, a third length of elongated high permittivity dielectric waveguide of finite cross section disposed adjacent to said conductive image plane and spaced from the other endmost one of said first lengths of waveguide to provide a third coupling region therebetween, and a thin film of synthetic organic resin disposed between and secured to said conductive image plane and said lengths of waveguide and extending laterally thereof, said thin film being low loss in character and having a low permittivity compared with that of said lengths of waveguide, said second length of waveguide having an inlet port at one end of said second coupling region and a first outlet port at the other end of said second coupling region and spaced from the adjacent first length of waveguide a distance substantially greater than the distance between said first and second lengths of waveguide in said second coupling region, said third length of waveguide having a termination at one end of said third coupling region and a second outlet port at the other end of said third coupling region and spaced from the adjacent first length of waveguide a distance greater than the distance between said first and third lengths of waveguide in said third coupling region, said band pass filter passing energy injected into said inlet port from said second length of waveguide through the first lengths of waveguide and said third length of waveguide and out of said second outlet port where the mean periphery of said first lengths of waveguide is an integral multiple of the guide wavelength of the energy in said first lengths of waveguide, said band pass filter passing energy injected into said inlet port from said second length of waveguide and out of said first outlet port when the mean periphery of said first lengths of waveguide is other than an integral multiple of the guide wavelength of the energy in said first lengths of waveguide.

Claim 18

The insular waveguide band pass ring resonator filter set forth in claim 14, wherein an even number of said first lengths of dielectric waveguide is provided, said termination being disposed adjacent to said inlet port and said second outlet port being positioned adjacent to said first outlet port.

Claim 19

The insular waveguide band pass ring resonator filter set forth in claim 14, wherein an odd number of first lengths of dielectric waveguide is provided, said termination being disposed adjacent to said first outlet port and said second outlet port being disposed adjacent to said inlet port.