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US 7,095,627 B2Granted
Frequency-selective shield structure and electric device having the structure
AssigneeHitachi, Ltd.
InventorHitoshi Yokota
Life of this patent
Estimating the term…
Abstract
A shield structure that transmits a radio wave in a specific frequency band and that exhibits a high shield characteristic in other bands. An opening portion having a specific shape and a specific perimeter length is formed on a conductor. A filter having a specific shape and a specific size is connected to the opening portion.
Claims35
A frequency-selective shield structure comprising:
- a conductor, at least one opening portion having a first end and a second end opposed to each other being formed in said conductor;
- one filter portion, said filter portion comprising;
- a first transmission line having a signal input end;
- and
- a second transmission line having a signal output end,
- wherein said signal input end in said first transmission line is connected to said first end, said signal output end in said second transmission line is connected to said second end;
- and
- said first transmission line and said second transmission line are disposed in the opening portion and are arranged in parallel to each other with a spacing interposed therebetween to constitute a coupled filter.
5 more elements
An electronic device having radio shield structure, said electronic device comprising:
- a radio communication interface device;
- a chassis incorporating said radio communication interface device;
- and
- a radio shield structure, said radio shield structure comprising:
- a conductor, an opening portion having a first end and a second end opposed to each other being formed in said conductor;
- a high frequency filter comprising:
- a first transmission line having a signal input end;
- and
- a second transmission line having a signal output end,
- wherein said signal input end in said first transmission line is connected to said first end, said signal output end in said second transmission line is connected to said second end;
- and
- wherein said high frequency filter is a coupled filter including said first and second transmission lines arranged in parallel to each other with a spacing interposed therebetween and disposed in said opening portion.
9 more elements
Dependencies are inferred from the claim text.