| 摘要 |
An electronic device comprising a laminate constituted by pluralities of insulation layers on which conductor patterns are formed; ground electrodes being formed on an upper-surface-side insulation layer and a bottom-surface-side insulation layer in the laminate; the laminate being partitioned to first and second regions by a first shield constituted by a line of via-holes electrically connecting the upper-surface-side ground electrode to the bottom-surface-side ground electrode; conductor patterns constituting a first filter for a first frequency band and conductor patterns constituting a first balun for the first frequency band being arranged in the first and second regions, respectively; pluralities of terminal electrodes being formed on bottom or side surfaces of the laminate; one of terminal electrodes of the first filter, which acts as an unbalanced port, being adjacent to a terminal electrode of the first balun, which acts as an unbalanced port, with no other terminal electrode than a ground electrode existing therebetween; and the first filter and the first balun being not electrically connected. |
| 主权项 |
1. An electronic device comprising:
a laminate constituted by pluralities of insulation layers on which conductor patterns are formed; a ground electrode being formed on each of an upper-surface-side insulation layer and a bottom-surface-side insulation layer in said laminate; said laminate being partitioned to first and second regions in a lamination direction between said upper-surface-side ground electrode and said bottom-surface-side ground electrode, by a first shield constituted by a ground electrode formed on an insulation layer between the upper-surface-side ground electrode and the bottom-surface-side ground electrode; first conductor patterns constituting a first filter for a first frequency band being arranged in said first region; second conductor patterns constituting a first balun for the first frequency band being arranged in said second region; first pluralities of terminal electrodes being formed on bottom or side surfaces of said laminate; one of terminal electrodes of said first filter, which acts as an unbalanced port, being arranged adjacently to a terminal electrode of said first balun, which acts as an unbalanced port, with no other terminal electrode than a ground electrode existing therebetween; said first filter and said first balun being not electrically connected in said laminate; a second shield constituted by a line of via-holes formed in a lamination direction to electrically connect said upper-surface-side ground electrode, said bottom-surface-side ground electrode and said first shield; said laminate being further partitioned by said first and second shields to first to fourth subregions in plane and lamination directions between said upper-surface-side ground electrode and said bottom-surface-side ground electrode; the first conductor patterns constituting the first filter for the first frequency band being arranged in said first subregion; the second conductor patterns constituting the first balun for the first frequency band being arranged in said second subregion, third conductor patterns constituting a second filter for a second frequency band being arranged in said third subregion; fourth conductor patterns constituting a second balun for the second frequency band being arranged in said fourth subregion; one of terminal electrodes of said second filter, which acts as an unbalanced port, being arranged adjacently to a terminal electrode of said second balun, which acts as an unbalanced port, with no other terminal electrode than a ground electrode existing therebetween; and said first filter, said first balun, said second filter and said second balun being not electrically connected in said laminate. |
