Increasing performance of planar inductors used in broadband applications
First Claim
1. An apparatus, comprising:
- a printed circuit board;
a high Quality factor (Q) value spiral planar inductor etched directly into a said 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 and mounted within a hole in said printed circuit board;
wherein said ferrite structure comprises a post portion mounted within said hole in said printed circuit board and a disk portion suspended from said post portion above said high Q value spiral planar inductor on said printed circuit board, said ferrite structure configured to rotate about an axis defined by said post.
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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.
38 Citations
39 Claims
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1. An apparatus, comprising:
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a printed circuit board; a high Quality factor (Q) value spiral planar inductor etched directly into a said 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 and mounted within a hole in said printed circuit board; wherein said ferrite structure comprises a post portion mounted within said hole in said printed circuit board and a disk portion suspended from said post portion above said high Q value spiral planar inductor on said printed circuit board, said ferrite structure configured to rotate about an axis defined by said post. - View Dependent Claims (2, 3, 4, 5)
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6. An apparatus, comprising:
- 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; wherein the ferrite structure includes a post connected to a pedestal structure, wherein the post is configured to fit inside the hole and the pedestal structure is configured to reside outside the hole. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
- a filter configured to operate in a broadband application, comprising;
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21. An apparatus, comprising:
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a printed circuit board; 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; anda ferrite structure fastened to the printed circuit board and covering at least a portion the high Q value spiral inductor; wherein the printed circuit board includes a hole passing through one or more layers of the printed circuit board, the hole positioned within the center portion of the high Q value spiral inductor, and the ferrite structure is fastened to the printed circuit board via the hole. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A diplexer, comprising:
a high pass filter and lower pass filter each comprising at least one 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 and bearing a hole, the high Q value spiral planar inductor further including a ferrite structure mounted to the printed circuit board, wherein the ferrite structure includes a post connected to a pedestal structure, and wherein the post is configured to fit inside the hole and the pedestal structure is configured to reside outside the hole.
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35. 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, wherein the center of the pedestal is offset from the center of the post. - View Dependent Claims (36, 37, 38, 39)
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Specification