SIGNAL BRANCHING FILTER, ELECTRONIC DEVICE USING THE SAME, ANTENNA APPARATUS, AND SIGNAL TRANSMISSION SYSTEM USED IN ALL OF THE ABOVE

摘要

Disclosed is a signal branching filter that is connected to a network having at least four terminals, and has: a first line, one end of which is connected to the first terminal of the network; a second line, one end of which is connected to the second terminal of the network; a third line, one end of which is connected to the third terminal of the network; and a fourth line, one end of which is connected to the fourth terminal of the network. The other end of the first line and the other end of the second line are connected at a first intersection, and the other end of the third line and the other end of the fourth line are connected at a second intersection. When a signal is inputted from the first intersection, the difference between the phase of the signal that appears on the second intersection side of the third line and the phase of the signal that appears on the second intersection side of the fourth line is approximately 180 degrees ± 360 degrees * n (n is an integer greater than or equal to 0).