Waveguide-to-microstrip transition for mmwave and MMIC applications
First Claim
1. A waveguide-to-microstrip transition for processing electromagnetic wave signals comprising:
- a waveguide for directing said signals to a waveguide input;
a cover for forming at least a portion of a cavity over said waveguide input, said cover providing both a backshort and a seal for said transition;
a first substrate for completely covering said waveguide input so as to form a hermetic seal over said waveguide input, said first substrate being substantially disposed in said cavity;
a first probe on said first substrate for conducting said signals to a microstrip line, and overlying said waveguide input; and
a second substrate having a second probe and completely covering another waveguide input so as to form a hermetic seal over said another waveguide input;
said first and second substrates constituting separate substrates; and
a first stub disposed on at least said first substrate;
a second stub disposed on at least said first substrate;
whereby said first and second stubs have been short-circuited for substantially matching the impedance between said first probe and said microstrip line.
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Accused Products
Abstract
A waveguide-to-microstrip transition package (30) for processing electromagnetic wave signals includes a waveguide (32) for directing the signals to the input of the waveguide (32). A substrate (34) overlaps the input of the waveguide (32) to form a hermetic seal. A metallized probe (36) conducts the signals to a microstrip line (40) and is patterned upon the substrate (34). The transition (30) also includes an iris (48) formed from a metallized pattern on the opposite side of the substrate (34) from the probe (36). The special design of the probe (36), the structure of the iris (48) and the wave guide cavity (46) above the probe (36) allow impedance matching and efficient signal transfer from waveguide (32) to microstrip line (40) or from microstrip line (40) to waveguide (32).
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Citations
18 Claims
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1. A waveguide-to-microstrip transition for processing electromagnetic wave signals comprising:
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a waveguide for directing said signals to a waveguide input; a cover for forming at least a portion of a cavity over said waveguide input, said cover providing both a backshort and a seal for said transition; a first substrate for completely covering said waveguide input so as to form a hermetic seal over said waveguide input, said first substrate being substantially disposed in said cavity; a first probe on said first substrate for conducting said signals to a microstrip line, and overlying said waveguide input; and a second substrate having a second probe and completely covering another waveguide input so as to form a hermetic seal over said another waveguide input; said first and second substrates constituting separate substrates; and a first stub disposed on at least said first substrate;
a second stub disposed on at least said first substrate;
whereby said first and second stubs have been short-circuited for substantially matching the impedance between said first probe and said microstrip line. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A waveguide-to-microstrip transition for processing electromagnetic wave signals comprising:
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a waveguide for directing said signals to a waveguide input; a cover for forming at least a portion of a cavity over said waveguide input, said cover providing both a backshort and a seal for said transition; a substrate connected to said waveguide input; a probe disposed upon said substrate for conducting said signals to a microstrip line; and an iris being substantially disposed in said cavity for providing isolation for said cavity, a first stub disposed on said substrate;
a second stub disposed on said substrate;
whereby said first and second stubs have been short circuited for substantially matching the impedance between said probe and said microstrip line . - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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18. A waveguide-to-microstrip transition for processing electromagnetic wave signals comprising:
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a waveguide for directing said signals to a waveguide input; a cover for forming at least a portion of a cavity over said waveguide input, said cover providing both a backshort and a seal for said transition; a substrate covering said waveguide input, said substrate being hermetically sealed to said waveguide; a probe on said substrate and overlying said waveguide input; an iris for providing isolation for said cavity, said iris being substantially disposed in said cavity; a microstrip line which is connected to said probe; a first stub disposed on said substrate; and a second and third stub disposed on said substrate; said first and second and third stubs having been short-circuited for substantially matching the impedance between said probe and said microstrip line; said first stub being connected to said probe, said second and third stubs are connected to said microstrip line.
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Specification