Patent ID: 7446625

Claim:
An impedance conversion device comprising: a first conductor having a first end and a second end; a second conductor having a first end and a second end, disposed relative to the first conductor so that the first conductor and the second conductor form a first transmission line having a first characteristic impedance; a third conductor having a first end and a second end, disposed relative to the first conductor so that the first conductor and the third conductor form a second transmission line having a second characteristic impedance different from the first characteristic impedance; a fourth conductor having a first end and a second end, disposed relative to the second conductor so that the second conductor and the fourth conductor form a third transmission line having the second characteristic impedance, and disposed relative to the third conductor so that the third conductor and the fourth conductor form a fourth transmission line having the first characteristic impedance; a first resistor having a resistance equal to the first characteristic impedance, having a first end connected to the second end of the second conductor and a second end connected to the second end of the fourth conductor; and a second resistor having a resistance equal to the second characteristic impedance, having a first end connected to the first end of the third conductor and a second end connected to the first end of the fourth conductor; wherein the second ends of the second and fourth conductors are mutually proximate; and the first ends of the third and fourth conductors are mutually proximate.