Wave transmission lines and networks – Coupling networks – With impedance matching
Patent
1988-06-27
1989-08-08
Gensler, Paul
Wave transmission lines and networks
Coupling networks
With impedance matching
333260, H01P 508
Patent
active
048556971
ABSTRACT:
A launcher having an outer conductor and a tapered central contact pin within a bore of the outer conductor connects coaxial transmission lines with microstrip transmission lines. The launcher, when used with a microstrip transmission line having a specific dielectric substrate thickness, provides matching of both the characteristic impedance and the electro-magnetic field configuration. The launcher also may be used effectively with microstrip transmission lines having different substrate thicknesses An adjustable stop transversely positions the upper surface of the microstrip transmission line relative to the launcher's outer conductor to counteract capacitive discontinuities caused by different substrate thicknesses. Although such adjustments flex the central contact pin transversely, thus changing the launcher's characteristic impedance, the launcher provides better overall matching between the two types of transmission lines. The contact tip of the pin has a cylindrical contact surface coaxial with the pin, thus forming a repeatable line contact with the upper conductor of the microstrip transmission line enabling consistent results. The bore of the outer conductor is at an angle with respect to the coaxial transmission line jack, allowing the tapered pin to extend coaxially with the jack so that the pin can be drilled and tapped on its center axis, simplifying its mass production.
REFERENCES:
patent: 3553607 (1971-01-01), Lehrfeld
patent: 3622915 (1971-11-01), Davo
patent: 3662318 (1972-05-01), Decuyper
patent: 3686624 (1972-08-01), Napoli et al.
patent: 3705379 (1972-12-01), Bogar
patent: 3725829 (1973-04-01), Brown
patent: 4280112 (1981-07-01), Eisenhart
patent: 4669805 (1987-06-01), Kosugi et al.
Harwood Warren K.
Jones Keith E.
Cascade Microtech, Inc.
Gensler Paul
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