MINIATURIZED TRANSMISSION LINE TRANSFORMER

A transmission line transformer suitable to miniaturization is provided to reduce the whole area by serially connecting an inductor or parallel connecting a capacitor to a transmission line, and to reduce parasitic resistance by using the short transmission line. A transmission line transformer suitable to miniaturization includes first to fourth transformed transmission lines(120,130,140,150). The first transformed transmission line is composed of a first transmission line(122), and a first capacitor(121) connected to the first transmission line in parallel. The second transformed transmission line is composed of a second transmission line(132), and a first inductor(131) connected to the second transmission line in series. The third transformed transmission line is composed of a third transmission line(143), a second inductor(141) connected to the third transmission line in series, and a second capacitor(142) connected to both ends of the third transmission line in parallel. The fourth transformed transmission line is composed of a fourth transmission line(153), a third capacitor(152) connected to the fourth transmission line in parallel, and a third inductor(151) inserted between the third capacitor and the fourth transmission line. The first to fourth transmission lines are shorter than a conventional transmission line.