Planar microwave integrated circuit power combiner
AssigneeGeneral Electric Company
InventorJohn P. Quine
Life of this patent
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Abstract
A broadband, low loss, microwave integrated circuit power combiner for field effect transistors and other solid state amplifiers has a single metallized MIC substrate contained within a waveguide structure. An array of fin-line transitions from plural microstrip lines to a standard output waveguide can be tapered and placed directly in the waveguide taper region. Undesired higher order modes are absorbed by resistance metallization strips at the tips of the fin-lines or by resistor networks which bridge the microstrip lines.
Claims16
A microwave power combiner comprising:
- a dielectric substrate having metallization patterns on both sides which form an array of fin-line transitions from microstrip to waveguide, said patterns having plural microstrip lines with a given characteristic impedance and an opposing continuous ground plane which transition to an unbalanced-to-balanced transformer and hence to plural fin-lines arranged such that the fin-lines on one substrate surface are staggered relative those on the other surface;
- and
- a plurality of microwave solid state amplifiers mounted on said dielectric substrate, each of which is connected to one of said microstrip lines;
- said array of fin-line transitions and attached solid state amplifiers being contained within a waveguide structure.
A planar microwave waveguide-microstrip transition to be mounted within a waveguide structure comprising:
- a dielectric substrate having metallization patterns on both sides;
- one pattern having a plurality of fin-lines each half of which is coupled to a microstrip line with a given characteristic impedance;
- the other pattern having a like number of staggered fin-lines which are coupled to a serrated choke and hence to a continuous ground plane;
- and
- power absorber resistance means for absorbing undesired higher order modes.
A planar microwave waveguide-microstrip transition to be mounted within a waveguide structure comprising:
- a tapered dielectric substrate having metallization patterns on both sides;
- one pattern having a plurality of tapered fin-lines, each half of which is coupled to a microstrip line with a given characteristic impedance;
- the other pattern having a like number of staggered tapered fin-lines which are coupled to a serrated choke and hence to a continuous ground plane;
- and
- power absorber resistance means for absorbing undesired higher order modes.
Dependencies are inferred from the claim text.