Balun with structural enhancements

Details Balun with structural enhancements Balun with structural enhancements

2007-09-25

2007-09-25

Takaoka, Dean (Department: 2817)

Wave transmission lines and networks

Coupling networks

Balanced to unbalanced circuits

C333S025000

Reexamination Certificate

active

10974192

ABSTRACT:
A balun including a pair of metal coil structures and an intervening dielectric layer having a thickness that is selected in response an operating frequency of the balun. The thickness of the dielectric layer may be used to tune the balun and enhance its self-inductance at its operating frequency. In addition, a balun with a pair of metal coil structures formed with an asymmetry that is selected to minimize an amplitude error in its output signal. A balun according the present teachings may also include an asymmetry in the positioning of its output terminals. The positioning of the output terminals of a balun may be adjusted to minimize phase errors at its output signal.

REFERENCES:
patent: 5313175 (1994-05-01), Bahl et al.
patent: 5745017 (1998-04-01), Ralph
patent: 6873221 (2005-03-01), Lucero et al.
patent: 6939788 (2005-09-01), Davies
patent: 7027795 (2006-04-01), Ji
John R. Long, Monolithic Transformers for Silicon RF IC Design, Sep. 2000, IEEE, 14 pages.

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