Wave transmission lines and networks – Plural channel systems – Having branched circuits
Patent
1997-02-12
1998-04-21
Gensler, Paul
Wave transmission lines and networks
Plural channel systems
Having branched circuits
333238, H01P 518
Patent
active
057422109
ABSTRACT:
A narrow-band overcoupled directional coupler 300 in a multilayer package is provided. The directional coupler 300 has a laminated structure including a stack of dielectric substrates (301-310) with a primary and a secondary transmission line on the layers of the dielectric substrates. The primary transmission line (A) and the secondary transmission line (B) are coupled by a combination of edge type coupling in which the primary and secondary transmission lines are substantially parallel with each other on a major surface of one of the dielectric substrates (307 for example) and broadside type coupled in which at least portions of the primary transmission line and secondary transmission line are substantially vertically aligned through adjacent dielectric substrates (303, 305 for example). The primary and secondary transmission lines are also substantially overcoupled to provide a predetermined off-center frequency which is different from an overcoupled center frequency.
REFERENCES:
patent: 5359304 (1994-10-01), Fujiki
patent: 5369379 (1994-11-01), Fujiki
patent: 5557245 (1996-09-01), Taketa et al.
Chaturvedi Rahul
Kommrusch Richard
Cunningham Gary J.
Gensler Paul
Motorola Inc.
Raufer Colin M.
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