Patent ID: 6759922
Filing Date: 2004-07-06
Classification: H01P,H03F

Abstract:
A multi-band coupled-line coupler for RF power amplifier module application comprising:a first conductor having a first and a second end portion and a first parallel portion therebetween; a second conductor having a first and a second end portion and a second parallel portion therebetween, said second parallel portion positioned substantially parallel to said first parallel portion; a common conductor having a first and a second end portion and a third parallel portion therebetween, said third parallel portion positioned substantially parallel to and between said first and second parallel portion, said third parallel portion having a first distance from said first parallel portion and a second distance from said second parallel portion, said first distance being different from said second distance; a first capacitor connected between a first point on said first parallel portion and a third point on said third parallel portion; and a second capacitor connected between a second point on said second parallel portion and a fourth point on said third parallel portion, wherein lengths of said first, second, and third parallel portion are substantially the same, and wherein: said first parallel portion has a length between 270 mil and 330 mil; said first distance is between 4.5 mil and 5.5 mil; said second distance is between 10 mil and 14 mil; said first capacitor has a capacitance between 0.18 pF and 0.22 pF; said second capacitor has a capacitance between 0.11 pF and 0.15 pF; said third parallel portion has a width between 7 mil and 9 mil; said first parallel portion has a width between 16 mil and 20 mil; said second parallel portion has a width between 16 mil and 20 mil; said first end portion of said first conductor has a width between 16 mil and 20 mil; said second end portion of said first conductor has a width between 16 mil and 20 mil; said first end portion of said second conductor has a width between 16 mil and 20 mil; said second end portion of said second conductor has a width between 16 mil and 20 mil; said first end portion of said common conductor has a width between 16 mil and 20 mil; and said second end portion of said common conductor has a width between 16 mil and 20 mil.