Balanced-to-unbalanced transformer embedded with filter

Details Balanced-to-unbalanced transformer embedded with filter Balanced-to-unbalanced transformer embedded with filter

2006-12-05

2008-12-30

Takaoka, Dean O (Department: 2817)

Wave transmission lines and networks

Coupling networks

Balanced to unbalanced circuits

C333S204000

Reexamination Certificate

active

07471166

ABSTRACT:
A balanced-to-unbalanced transformer embedded with a filter, the balanced-to-unbalanced transformer being disposed in a multi-layered substrate and comprising vertically coupled transmission lines designed in different layers in the multi-layer substrate to increase transmission performances. A capacitor and a transmission line are connected to a single-ended I/O port of the balanced-to-unbalanced transformer such that a filter is embedded in the balanced-to-unbalanced transformer.

REFERENCES:
patent: 6791431 (2004-09-01), De Flaviis
patent: 6803835 (2004-10-01), Frank
patent: 6850127 (2005-02-01), Sakakura et al.
patent: 6954116 (2005-10-01), Nosaka
patent: 7116185 (2006-10-01), Ohi et al.
patent: 7176776 (2007-02-01), Tantwai et al.
Electronics Letters vol. 38, Issue 11, pp. 519-520, May 23, 2002.

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