Increasing performance of planar inductors used in broadband applications
First Claim
1. An apparatus, comprising:
- a high Quality factor (Q) value spiral planar inductor etched directly into a printed circuit board; and
a ferrite structure attached to the printed circuit board and located in proximity to the high Q value spiral planar inductor.
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Accused Products
Abstract
Increasing performance of planar inductors used in broadband applications is described. In one implementation, an apparatus includes a high Quality factor (Q) value spiral planar inductor etched directly into a printed circuit board. A ferrite structure is attached to the printed circuit board and located in proximity to the high Q value spiral planar inductor. The ferrite structure increases the Q of spiral planar inductors, but without the inconvenience and expense of a wire wound terroidal inductors. Various shaped ferrite structures may be used in conjuction with the spiral planar inductors. Additionally, in certain implementations, the ferrite structures are configured to rotate about axis permitting the inductors to be tuned, even after components have been installed on a printed circuit board.
25 Citations
37 Claims
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1. An apparatus, comprising:
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a high Quality factor (Q) value spiral planar inductor etched directly into a printed circuit board; and
a ferrite structure attached to the printed circuit board and located in proximity to the high Q value spiral planar inductor. - View Dependent Claims (2, 3, 4, 5)
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6. An apparatus, comprising:
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a filter configured to operate in a broadband application, comprising;
a generally circular high Quality factor (Q) value spiral planar inductor etched directly into a printed circuit board;
a hole positioned within one or more layers of the printed circuit board; and
a ferrite structure positioned within at least a portion of the hole. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. An apparatus, comprising:
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a printed circuit board; and
a filter, operable in a broadband communication interface application;
the filter comprising a high Quality factor (Q) value spiral planar inductor having generally circular conductive traces etched directly into the printed circuit board, wherein an outer most conductive trace wraps around inner conductive traces that form a spiral leading to an inner most conductive trace, wherein the inner most conductive trace wraps around a center portion of the inductor, the center portion having no conductive traces; and
a ferrite structure fastened to the printed circuit board and covering at least a portion the high Q value spiral inductor. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. A diplexer, comprising:
a high pass filter and lower pass filter each comprising at least one a high Quality factor (Q) value spiral planar inductor etched onto a printed circuit board;
wherein the high Q value spiral planar inductor includes conductive traces etched directly into the printed circuit board forming an ellipse, wherein an outer most conductive trace wraps around inner conductive traces that form a spiral leading to an inner most conductive trace, wherein the inner most conductive trace wraps around a center portion of the inductor, the center portion having no conductive traces, the high Q value spiral planar inductor further including a ferrite structure coupled to the printed circuit board.
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33. A ferrite structure, comprising:
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a pedestal structure; and
a post perpendicular to and connected to the pedestal structure, both the pedestal and post composed of a ferromagnetic material, wherein the ferrite structure is for use specifically with a high Quality factor (Q) value spiral planar inductor etched directly into a printed circuit board. - View Dependent Claims (34, 35, 36, 37)
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Specification