US3899759A — Electric wave resonators

Claim 1

Independent Claim 152 words

An electric-wave cavity resonator with a plurality of modes or resonance in a given frequency band intended for operation in a single one of said modes in said band of frequencies, comprising electrically-conductive surrounding walls to define said cavity, coupling means on one or more of said walls, and mode detuning means comprising one or more elongated conductive pins having no cross-sectional dimension that is greater than a minor fraction of the length dimension placed within the cavity in positions and orientations so selected that the length dimension of each lies substantially perpendicular to the high frequency electric field of said single mode of resonance and substantially parallel to the high frequency electric field of others of said modes of resonance for tuning the resonance frequency of said cavity for said other modes to frequencies outside of said frequency band with substantially minimum addition of surface upon which electric currents must flow.

Claim 2

Dependent Claim 152 words

An electric-wave cavity resonator with a plurality of modes or resonance in a given frequency band intended for operation in a single one of said modes in said band of frequencies, comprising electrically-conductive surrounding walls to define said cavity, coupling means on one or more of said walls, and mode detuning means comprising one or more elongated conductive pins having no cross-sectional dimension that is greater than a minor fraction of the length dimension placed within the cavity in positions and orientations so selected that the length dimension of each lies substantially perpendicular to the high frequency electric field of said single mode of resonance and substantially parallel to the high frequency electric field of others of said modes of resonance for tuning the resonance frequency of said cavity for said other modes to frequencies outside of said frequency band with substantially minimum addition of surface upon which electric currents must flow.

Claim 3

Dependent Claim 20 words

Cavity resonator according to claim 1 wherein said conductive walls comprise a cylindrical side wall and two planar end walls.

Claim 4

Dependent Claim 56 words

Cavity resonator according to claim 2 wherein said mode detuning means comprise one or more of said detuning pins extending into the cavity from at least one of said end walls in a direction parallel to the cylindrical axis and placed at a radial distance from the axis intermediate between said axis and said side wall.

Claim 5

Dependent Claim 40 words

Cavity resonator according to claim 2 in which said mode detuning means comprise one or more of said detuning pins extending into the cavity in a radial direction from the cylindrical wall at a position intermediate between said end walls.

Claim 6

Dependent Claim 35 words

An electric wave band pass-filter comprised of one or more resonant cavities as in claim 2, each of said cavities having two of said coupling means, said cavities being coupled together via said coupling means.

Claim 7

Dependent Claim 44 words

An electric wave band-pass filter according to claim 5 wherein two or more of said cavities are coupled together in tandem, with each pair of adjacent cavities sharing a common end wall and common coupling means in said common wall between said adjacent cavities.

Claim 8

Dependent Claim 54 words

An electric wave band-pass filter according to claim 5 wherein said mode detuning means comprise one or more pins protruding into the cavity from at least one of the said end walls in a direction parallel to the axis of the cavity and placed at positions intermediate between the axis and the side wall.

Claim 9

Dependent Claim 38 words

An electric wave band-pass filter according to claim 5 wherein said mode detuning means comprise one or more pins protruding into the cavity from the cylindrical wall in a radial direction from positions intermediate between the end walls.

Claim 10

Dependent Claim 41 words

An electric wave band pass-filter comprised of a sequential plurality in excess of two of said resonant cavities as in claim 1, each of said cavities having two of said coupling means, said cavities being coupled together via said coupling means.

Claim 11

Dependent Claim 41 words

An electric wave band-pass filter according to claim 9 wherein two of said cavities are coupled together in tandem, with each pair of adjacent cavities sharing a common wall and common coupling means in said common wall between said adjacent cavities.

Claim 12

Dependent Claim 145 words

An electric-wave band-pass filter according to claim 10 wherein the two coupling means of each cavity are located side-by-side in the same wall of the cavity, and said cavities are all attached to a common electrically-conductive plate which serves as a wall for each of said cavities, said cavities being aligned sequentially thereon but placed alternately on opposite sides of said plate with the intercoupled cavities in said tandem sequence being on opposite sides in each case, and with coupling means sequentially arrayed in said common plate between said cavities, an intermediate cavity in said sequential plurality being coupled at a first of its two coupling means to the immediately preceding cavity via one of the means in said plate, and at the second of its two coupling means to the immediately following cavity via the sequentially-next one of the coupling means in said plate.

Claim 13

Dependent Claim 68 words

An electric-wave band-pass filter according to claim 11, said cavities having cylindrical shapes with axes aligned perpendicular to said common plate which provides an end wall for each cavity, the two coupling means of each cavity being an adjacent pair of said sequentially arrayed coupling means in said plate, the axis of said cavity meeting said plate at a point that is between the members of said pair.

Claim 14

Dependent Claim 159 words

An electric-wave band-pass filter comprised of a plurality in excess of two of resonant cavities coupled together in tandem sequence, the first and the last of said cavities in sequence having external coupling means, with each adjacent pair of cavities in said sequence having a mutual coupling means, said cavities being mounted on a common electrically-conductive plate which serves as a wall for each cavity, said cavities being alternately placed on opposite sides of said common plate in said sequence, said mutual coupling means connecting the members of said pairs of cavities through said common plate there being two coupling means for each cavity located side-by-side in the cavity wall that is provided by said plate, an intermediate one in said sequence of cavities being mutually coupled through one of its said coupling means with the immediately preceding cavity in said sequence, and through the other of its said coupling means with the immediately following cavity in said sequence.

Claim 15

Dependent Claim 159 words

An electric-wave band-pass filter comprised of a plurality in excess of two of resonant cavities coupled together in tandem sequence, the first and the last of said cavities in sequence having external coupling means, with each adjacent pair of cavities in said sequence having a mutual coupling means, said cavities being mounted on a common electrically-conductive plate which serves as a wall for each cavity, said cavities being alternately placed on opposite sides of said common plate in said sequence, said mutual coupling means connecting the members of said pairs of cavities through said common plate there being two coupling means for each cavity located side-by-side in the cavity wall that is provided by said plate, an intermediate one in said sequence of cavities being mutually coupled through one of its said coupling means with the immediately preceding cavity in said sequence, and through the other of its said coupling means with the immediately following cavity in said sequence.

Claim 16

Dependent Claim 182 words

An electric wave cavity resonator for use at microwave frequencies dimensioned to resonate to wave energy in a TEO1N mode in a frequency band centered at a specified frequency, said cavity having the property of resonance to other wave modes therein, end wall means for said cavity disposed transverse to the cylinder axis and having coupling means therein located off-center at the radial distance from said axis which favors coupling to the radial component of the magnetic field Hr for the TEO1N mode, and mode-shift means each comprising an electrically conductive elongate pin having no cross-sectional dimension that is greater than a minor fraction of its length dimension extending into said cavity from at least one end wall, said mode-shift means being located on said end wall with its length dimension extending into said cavity in an axial direction so as to detune the cavity for wave energy in said other modes to effectively shift the resonance frequency of the cavity for such other modes out of said frequency band with substantially minimum addition of surface upon which electric currents must flow.

Claim 17

Dependent Claim 182 words

An electric wave cavity resonator for use at microwave frequencies dimensioned to resonate to wave energy in a TEO1N mode in a frequency band centered at a specified frequency, said cavity having the property of resonance to other wave modes therein, end wall means for said cavity disposed transverse to the cylinder axis and having coupling means therein located off-center at the radial distance from said axis which favors coupling to the radial component of the magnetic field Hr for the TEO1N mode, and mode-shift means each comprising an electrically conductive elongate pin having no cross-sectional dimension that is greater than a minor fraction of its length dimension extending into said cavity from at least one end wall, said mode-shift means being located on said end wall with its length dimension extending into said cavity in an axial direction so as to detune the cavity for wave energy in said other modes to effectively shift the resonance frequency of the cavity for such other modes out of said frequency band with substantially minimum addition of surface upon which electric currents must flow.

Claim 18

Dependent Claim 47 words

A filter comprising at least two of said cylindrical cavities according to claim 14, and between them coupling means in the form of an electrically-conductive common endwall member having an iris opening through it located to favor Hr wave energy in said TEO1N mode between said cavities.

Claim 19

Dependent Claim 27 words

A filter according to claim 15 having a plurality of said cavities in tandem, and a set of said pins on each end wall of each cavity.

Claim 20

Dependent Claim 54 words

A resonator according to claim 14 in which said mode-shift means comprises a set of pins extending into said cavity from the locus of a circle at a radial distance from said cylinder axis where the E-field of at least a substantial Component of said other modes approaching said end wall is substantially maximum.

Claim 21

Dependent Claim 17 words

A resonator according to claim 17 in which each end wall has a set of said pins.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1978-08-11	1979-02-10	1979-08-12	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1982-08-11	1983-02-10	1983-08-12	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1986-08-11	1987-02-10	1987-08-12	$7700.00	Window Closed / Lapsed

Electric wave resonators

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