Microstrip twisted broadside coupler apparatus

Details Microstrip twisted broadside coupler apparatus Microstrip twisted broadside coupler apparatus

1992-03-05

1994-01-25

Lee, Benny

Wave transmission lines and networks

Plural channel systems

Having branched circuits

333111, H01P 518

Patent

active

052819299

ABSTRACT:
A broadside microstrip coupler employs a first transmission line which consists of a series of capacitor plates which alternate between a dielectric layer from a first location to a second location and each of the series of plates are connected together with a top plate on the top surface of the dielectric and a bottom plate located a given distance beneath the dielectric layer. A second transmission line alternates between the top and bottom layers of the dielectric and consists of a second series of plates where each capacitor is connected to an adjacent plate with the top plate of the first connecting to the bottom plate of the second and the bottom plate of the first connecting to the top plate of the second and so on. This pattern is repeated so that the conductive plate path alternates from the top to the bottom plate. The coupler allows for tight coupling between inputs and outputs and enables the even and odd mode phase velocity differences to be compensated for due to the fact that the odd mode travels between the two conductors and the even mode travels between the conductor and the ground plate.

REFERENCES:
patent: 3526034 (1970-09-01), Beurrier
patent: 4001730 (1977-01-01), Spinner
patent: 4023123 (1977-05-01), Reindel
patent: 4482873 (1984-11-01), Nyhus
patent: 4532484 (1985-07-01), Tajima et al.
patent: 4967171 (1990-10-01), Ban et al.
patent: 5075646 (1991-12-01), Moise

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