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.
Claims14
A laminated balun transformer comprising at least two pairs of striplines, the striplines of each pair being electromagnetically coupled through a dielectric layer, the two pairs of striplines being in parallel planes with said dielectric layer interposed therebetween.
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 electromagnetically coupled with said first stripline located at one surface thereof;
- a third dielectric sheet with a third stripline located at one surface thereof;
- a fourth dielectric sheet with a fourth stripline 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, and said fourth dielectric sheets are in a stacked relationship one above another in a laminated structure.
A laminated transformer comprising at least two pairs of striplines, the pairs of striplines being electrically coupled together, the two pairs of striplines being stacked with a dielectric layer disposed therebetween, and each stripline being laminated to a dielectric layer without being disposed on the same dielectric layer as another stripline.
A method of making a laminated transformer comprising the steps of:
- forming a plurality of dielectric sheets;
- forming a first stripline on a first dielectric sheet;
- forming a second stripline on a second dielectric sheet such that said second stripline is electromagnetically coupled with said first stripline;
- forming a third stripline on a third dielectric sheet;
- forming a fourth stripline on a fourth dielectric sheet such that said fourth stripline is electromagnetically coupled with said third stripline;
- electrically connecting said first stripline and said fourth stripline;
- and
- stacking said first, said second, said third, and said fourth dielectric sheets to form a laminated structure.
A method of making a laminated transformer comprising the steps of:
- forming at least two pairs of striplines, the striplines of each pair being electromagnetically coupled;
- placing a dielectric layer between the striplines of each pair;
- and
- placing a dielectric layer between the two pairs of striplines.
Dependencies are inferred from the claim text.