Signal isolation device and method for improving the same
AssigneesInventec (Pudong) Technology Corporation, Inventec Corporation
InventorsHsin-Hung LIN, Wei-Chen CHENG
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Abstract
A signal isolation device includes at least one electromagnetic band-gap unit. The at least one electromagnetic band-gap unit includes a substrate, a metal foil main body, and a plurality of T-shaped metal foil features. The metal foil main body is disposed on the substrate, and the metal foil main body is square. The T-shaped metal foil features is disposed on the substrate and extending from a periphery of the metal foil main body. The T-shaped metal foil features are in a rotational symmetry around a center of the metal foil main body.
Claims20
A method for improving a signal isolation device, comprising:
- providing a signal isolation device which includes a plurality of electromagnetic band-gap (EBG) units adjoining each other, and each EBG unit has a substrate, a metal foil main body, and a plurality of metal features, the metal foil main body and the metal features are disposed on the substrate, and the metal features extend from a periphery of the metal foil main body;
- generating a current concentration location related to the EBG units according to a corresponding frequency band of an insertion loss value of the signal isolation device;
- determining that the signal isolation device has a capacitive property or an inductive property according to the corresponding frequency band of the insertion loss value;
- and
- adjusting at least one of the metal features according to the current concentration location and according to the capacitive property or the inductive property of the signal isolation device.
A signal isolation device, comprising:
- at least one electromagnetic band-gap unit, comprising:
- a substrate;
- a metal foil main body disposed on the substrate, and the metal foil main body is square;
- and
- a plurality of T-shaped metal foil features disposed on the substrate and extending from a periphery of the metal foil main body, wherein the T-shaped metal foil features are in a rotational symmetry around a center of the metal foil main body.
A signal isolation device, comprising:
- a plurality of electromagnetic band-gap units arranged in a row, and each electromagnetic band-gap unit comprising:
- a square substrate;
- a square metal foil main body disposed on the substrate;
- and
- a plurality of T-shaped metal foil features disposed on the substrate and extending from a periphery of the metal foil main body, wherein the T-shaped metal foil features are in a rotational symmetry around a center of the metal foil main body.
Dependencies are inferred from the claim text.