Balun circuit and integrated circuit device

Details Balun circuit and integrated circuit device Balun circuit and integrated circuit device

2008-03-11

2011-12-13

Takaoka, Dean (Department: 2817)

Wave transmission lines and networks

Coupling networks

Balanced to unbalanced circuits

C333S128000

Reexamination Certificate

active

08076993

ABSTRACT:
A balun circuit comprising first through third CPW lines becoming signal I/O ports, a first differential transmission line for linking the central conductor of the second CPW line and the ground conductor of the first CPW line and for linking the ground conductor of the second CPW line and the central conductor of the first CPW line, a second differential transmission line for linking the central conductors of the first and third CPW lines and for linking the ground conductors of the first and third CPW lines, and a joint for connecting at least two ground conductors of the first through third CPW lines. The differential transmission line has a first line formed in a dielectric layer on a substrate, a second line arranged in the underlying layer, and an underlying line at a fixed potential arranged between the substrate and the second line.

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Y. Hamada et al., “A 60-GHz-band Compact IQ Modulator MMIC for Ultra-high-speed Wireless Communication”, 2006 IEEE MTT-S International Microwave Symposium Digest, pp. 1701-1704, Jun. 2006.
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