Multilayer board switch matrix

Details Multilayer board switch matrix Multilayer board switch matrix

2007-03-20

2007-03-20

Takaoka, Dean (Department: 2817)

Wave transmission lines and networks

Plural channel systems

Having branched circuits

C333S032000

Reexamination Certificate

active

11020341

ABSTRACT:
A multi-layer cross connect having high isolation between signal channels, the multi-layer cross connect comprising: (a) a multi-layer circuit board having a top and bottom orientation and comprising at least a bottom layer and one or more upper layers; (b) a plurality of microstrip launches along the perimeter of the bottom layer; (c) a plurality of striplines on the bottom layer, each stripline being connected to one and only one microstrip launch and comprising a transformer for lowering its impedance and thereby increasing its width, the striplines comprising first striplines and second striplines; (d) a plurality of transition vias, each transition via conductively coupling each of the second striplines to a stripline on an upper layer; and (e) a combiner on each layer for combining signals from multiple striplines to a common stripline.

REFERENCES:
patent: 6208219 (2001-03-01), Singer
patent: 6393309 (2002-05-01), Mansour
patent: 6965279 (2005-11-01), Carson

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