To further reduce an insertion loss especially at a high-frequency region in a branching transformer for high-frequency signals preferably used for a signal transmission outlet of one branch that can be used in the transmission of a signal to the high-frequency region such as an intermediate frequency signal of satellite television broadcast.
The branching transformer 31 for high-frequency signals is constituted such that: master and branching winding sections are provided by forming two through holes 34, 35 in a ferrite core 32; a master signal winding A2 is inserted into the through hole 34 at the master winding section and a master ground winding B2 is wound; and a branching signal winding D2 and a branching ground winding C2 are wound in the through hole 35 at the branching winding section. Furthermore, the wire A2 passes through the shortest route to a substrate only by passing through the through hole 34, while winding the winding B2 at a substrate side as compared with an intermediate position with respect to the circumferential direction of an outer periphery surface at the master winding section. The core 32 is supported by support pieces 36, 37, and deviation in the winding B2 is suppressed by a locking projection 38.
KOMATSU MIKIO
MAEDA MITSURU
Kyuichi Ueki
Takao Ito