Laminated balun transformer
AssigneeMurata Manufacturing Co., Ltd.
InventorTakehiko Morikawa
Life of this patent
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Abstract
A laminated balun transformer includes a dielectric sheet for which a lead electrode is provided at its surface, dielectric sheets for which λ/4 striplines are provided at their surfaces respectively, and dielectric sheets for which ground electrodes are provided at their surfaces respectively. One pair of opposing striplines is provided with a dielectric sheet disposed therebetween so as to be electromagnetically coupled. The other pair of opposing striplines is provided with a dielectric sheet disposed therebetween so as to be electromagnetically coupled. An end of a stripline of one pair of striplines is electrically connected to an end of a stripline of the other pair of striplines through an external electrode.
Claims12
A laminated balun transformer comprising at least two pairs of striplines, the striplines of each pair being exclusively electromagnetically coupled to one another through a respective dielectric layer, the two pairs of striplines being in parallel planes with respect to one another, and with another dielectric layer having a grounded electrode thereon interposed between said pairs of striplines.
A laminated balun transformer comprising:
- a first dielectric sheet with a first stripline located at one surface thereof;
- a second dielectric sheet with a second stripline exclusively electromagnetically coupled with said first stripline located at one surface thereof;
- a third dielectric sheet with a first grounded electrode located at one surface thereof:
- a fourth dielectric sheet with a third stripline located at one surface thereof;
- a fifth dielectric sheet with a fourth stripline exclusively electromagnetically coupled with said third stripline located at one surface thereof;
- and
- electrically connecting means for electrically connecting said first stripline and said fourth stripline, wherein said first, said second, said third, said fourth, and fifth dielectric sheets are in a stacked relationship one above another in a laminated structure.
A laminated balun transformer used for a balanced-unbalanced circuit for taking out balanced signals from unbalanced signals or unbalanced signals from balanced signals, comprising at least two pairs of striplines, the striplines of each pair being exclusively electromagnetically coupled to one another through a respective dielectric layer, the two pairs of striplines being in parallel planes with respect to one another, and with another dielectric layer having a grounded electrode thereon interposed between said pairs of striplines.
Dependencies are inferred from the claim text.