US5142253A — Spatial field power combiner having offset coaxia…

Claim 1

Independent Claim 133 words

A transition between a coaxial transmission line and a planar transmission line comprising: an offset coaxial line having an inner conductor and an outer conductor, said inner conductor being non-coaxial with said outer conductor and thus offset from said outer conductor, with said inner conductor of said offset coaxial line being disposed between said inner conductor of said coaxial transmission line and a first conductor of said planar transmission line, and said outer conductor of said offset coaxial line being disposed between said outer conductor of said coaxial transmission line and a second conductor of said planar transmission line; a cylindrical cavity; and a cylindrical metallic sleeve disposed between said cylindrical cavity, and said planar transmission line, and wherein said inner conductor of said offset coaxial line is disposed within said metallic sleeve.

Claim 2

Dependent Claim 133 words

A transition between a coaxial transmission line and a planar transmission line comprising: an offset coaxial line having an inner conductor and an outer conductor, said inner conductor being non-coaxial with said outer conductor and thus offset from said outer conductor, with said inner conductor of said offset coaxial line being disposed between said inner conductor of said coaxial transmission line and a first conductor of said planar transmission line, and said outer conductor of said offset coaxial line being disposed between said outer conductor of said coaxial transmission line and a second conductor of said planar transmission line; a cylindrical cavity; and a cylindrical metallic sleeve disposed between said cylindrical cavity, and said planar transmission line, and wherein said inner conductor of said offset coaxial line is disposed within said metallic sleeve.

Claim 3

Dependent Claim 51 words

The transition as recited in claim 1 wherein said cylindrical cavity has a resonant frequency and length such that said resonant frequency of said cavity is greater than an operating frequency of a signal fed to said offset coaxial line from either said coaxial transmission line or said planar transmission line.

Claim 4

Dependent Claim 199 words

A signal combiner comprising: a plurality of coaxial input transmission lines disposed at a first end of the signal combiner, each coaxial input transmission line having an inner conductor dielectrically spaced from an outer conductor and coaxial with said outer conductor; a plurality of planar transmission lines, each line having a first and a second conductor; a respective one of a plurality of field transforming lines coupled between each of said coaxial input transmission lines and a first end of a corresponding one of said plurality of said planar transmission lines, each of said plurality of field transforming lines comprising: a coaxial line having an inner and outer conductor, said inner conductor being non-coaxial with said outer conductor, and said inner conductor being disposed between said inner conductor of said coaxial transmission line and said first conductor of said planar transmission line and said outer conductor of said offset coaxial line being disposed between said outer conductor of said coaxial transmission line and said second conductor of said planar transmission line; a signal absorber disposed adjacent to said plurality of planar transmission lines; and means for combining a second end of each of said plurality of planar transmission lines.

Claim 5

Dependent Claim 199 words

A signal combiner comprising: a plurality of coaxial input transmission lines disposed at a first end of the signal combiner, each coaxial input transmission line having an inner conductor dielectrically spaced from an outer conductor and coaxial with said outer conductor; a plurality of planar transmission lines, each line having a first and a second conductor; a respective one of a plurality of field transforming lines coupled between each of said coaxial input transmission lines and a first end of a corresponding one of said plurality of said planar transmission lines, each of said plurality of field transforming lines comprising: a coaxial line having an inner and outer conductor, said inner conductor being non-coaxial with said outer conductor, and said inner conductor being disposed between said inner conductor of said coaxial transmission line and said first conductor of said planar transmission line and said outer conductor of said offset coaxial line being disposed between said outer conductor of said coaxial transmission line and said second conductor of said planar transmission line; a signal absorber disposed adjacent to said plurality of planar transmission lines; and means for combining a second end of each of said plurality of planar transmission lines.

Claim 6

Dependent Claim 74 words

The combiner of claim 3 wherein said means for combining a second end of each of said plurality of planar transmission lines comprises: a plurality of impedance transforming lines, each one of said plurality of impedance transforming lines connected at one end to a respective one of said plurality of planar transmission lines, and each impedance transformer line having another end connected in parallel with each other to provide the output of said combiner.

Claim 7

Dependent Claim 34 words

The combiner of claim 4 further comprising: a plurality of R.F. sources wherein each one of said plurality of R.F. sources is coupled to a respective one of said plurality of coaxial transmission lines.

Claim 8

Dependent Claim 25 words

The combiner claim 5 wherein each of said plurality of R.F. sources provides a signal having a phase and amplitude over a predetermined frequency band.

Claim 9

Dependent Claim 140 words

The combiner of claim 3 wherein, each of said plurality of planar lines is spatially separated from each other planar transmission lines with the first plane conductor of each planar line being nearest each other having the same instantaneous polarity in a balanced mode, said balanced mode having a field substantially of the same phase and confined between the first and second conductors of each of said plurality of planar transmission lines, and wherein said signal absorber is a composite absorber, comprising: a first absorber disposed adjacent to each of said first conductors of said planar transmission lines; and a second absorber disposed adjacent to each of said second conductors of said planar transmission lines, wherein unbalanced mode fields provided between the first and second plane conductors of adjacent planar transmission lines are attenuated by said first and second absorbers.

Claim 10

Dependent Claim 162 words

An RF circuit comprising: a plurality of signal channels, each signal channel comprising: (a) a signal terminal disposed at a first end of the circuit; (b) a coaxial transmission line having a first end coupled to said signal terminal; (c) a planar transmission line disposed along a longitudinal axis of the circuit; (d) means, coupled between a second end of said coaxial transmission line and a first end of said planar line, for transforming an electric field associated with said coaxial line to an electric field associated with said planar line, comprising: (i) an inner conductor having a first end spaced at a first radial distance from said longitudinal axis and a second end disposed at a second radial distance from said longitudinal axis, said second radial distance being less than said first radial distance; and (ii) an outer conductor spaced from said inner conductor by a predetermined radial distance; and a signal absorber, disposed adjacent to said plurality of signal channels.

Claim 11

Dependent Claim 162 words

An RF circuit comprising: a plurality of signal channels, each signal channel comprising: (a) a signal terminal disposed at a first end of the circuit; (b) a coaxial transmission line having a first end coupled to said signal terminal; (c) a planar transmission line disposed along a longitudinal axis of the circuit; (d) means, coupled between a second end of said coaxial transmission line and a first end of said planar line, for transforming an electric field associated with said coaxial line to an electric field associated with said planar line, comprising: (i) an inner conductor having a first end spaced at a first radial distance from said longitudinal axis and a second end disposed at a second radial distance from said longitudinal axis, said second radial distance being less than said first radial distance; and (ii) an outer conductor spaced from said inner conductor by a predetermined radial distance; and a signal absorber, disposed adjacent to said plurality of signal channels.

Claim 12

Dependent Claim 49 words

The RF Circuit of claim 8 wherein pairs of said inner conductors and corresponding outer conductors are spaced from each other with said outer conductors spaced at a first distance and said the inner conductors spaced at a second, different distance with said distances disposed along a common radius.

Claim 13

Dependent Claim 79 words

The RF circuit as recited in claim 9 wherein said signal absorber comprises: a first cylindrical member comprised of an RF absorbing material, said cylindrical member disposed adjacent to the first planar conductor of the planar transmission line of each of the plurality of channels; and a second cylindrical member comprised of an RF absorbing material, said second cylindrical member disposed adjacent to the second planar conductor of the planar transmission line of each of the plurality of channels.

Claim 14

Dependent Claim 58 words

The RF circuit as recited in claim 10 wherein each of said means for transforming an electric field comprises: a cavity resonator, disposed adjacent to said coaxial transmission line and to said first planar conductor of said respective planar transmission line, having a resonant frequency greater than a frequency within an operating band of frequencies of said circuit.

Claim 15

Dependent Claim 93 words

The RF circuit as recited in claim 11 wherein each of said cavity resonators comprises: an electrically conductor cylinder having a length corresponding to a quarter of a wavelength at said resonant frequency with a wall portion of said cylinder providing a first wall of said cavity; and a support member having a second wall of electrically conductive material disposed opposite said first wall and providing a second wall of said cavity with said first and second walls being spaced by a distance which is related to the resonant frequency of said cavity.

Claim 16

Dependent Claim 42 words

The RF circuit as recited in claim 12 wherein each of said electrically conductive cylinders is disposed concentric with a corresponding coaxial transmission line and said electrically conductive cylinder is coupled to the first planar conductor of said respective planar transmission line.

Claim 17

Dependent Claim 30 words

The RF circuit as recited in claim 13 further comprising: means, coupled to each planar transmission line, for providing a terminal common to each of said plurality of signal channels.

Claim 18

Dependent Claim 35 words

The RF circuit as recited in claim 14 wherein said means for providing a common terminal comprises: a waveguide coupled between each one of said planar transmission lines and said common terminal of the circuit.

Claim 19

Dependent Claim 62 words

The RF circuit as recited in claim 15 wherein said waveguide is comprised of a first outer conductor and a plurality of stepped conductors, with each one of said plurality of stepped conductors having one end connected to corresponding first planar conductors of said plurality of channels and each having a second end connected together at said common terminal of said circuit.

Claim 20

Dependent Claim 31 words

The RF circuit as recited in claim 16 further comprising: a housing, with said RF circuit disposed in said housing; and means, disposed in said housing, for for cooling said housing.

Claim 21

Dependent Claim 35 words

The RF circuit as recited in claim 17 wherin said circuit further comprises: means, coupled to said housing, for providing a pressurized gas flow to said plurality of stepped conductors and said planar transmission lines.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1995-08-25	1996-02-24	1996-08-25	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1999-08-25	2000-02-24	2000-08-25	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2003-08-25	2004-02-24	2004-08-25	$7700.00	Window Closed / Lapsed

Spatial field power combiner having offset coaxial to planar transmission line transitions

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