Wave transmission lines and networks – Wave mode converters
Patent
1979-02-21
1981-07-21
Nussbaum, Marvin L.
Wave transmission lines and networks
Wave mode converters
333 34, 333246, 333260, H01P 508, H01P 104, H01P 308
Patent
active
042801125
ABSTRACT:
An electrical coupler for transmitting high frequency electrical signals from a coaxial transmission to a microstrip transmission line. The coupler is adapted to match the characteristic impedance of the two media and the electromagnetic field patterns of the two media at the interfaces therewith. The coupler provides a transition having a very low reflections at frequencies at least up to 18 GHz. The preferred embodiment transitions utilize a cylindrical outer conductor and an inner conductor which is centered relative the outer conductor at the coaxial end of the coupler and gradually shifted offcenter so that it is very near the outer conductor at the microstrip end of the coupler. The characteristic impedance of the coupler is maintained at a constant value by appropriate variation of the inner conductor. Other features are disclosed.
REFERENCES:
patent: 3553607 (1971-01-01), Lehrfeld
patent: 3622915 (1971-11-01), Davo
patent: 3686624 (1972-08-01), Napoli et al.
patent: 3705379 (1972-12-01), Bogar
patent: 3725829 (1973-04-01), Brown
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