Patent ID: 7772941
Filing Date: 2010-08-10
Classification: H01P

Abstract:
1. A balun comprising: a dielectric layer having a first side and a second side that is located opposite to the first side; a first conductor layer located on the first side; and a second conductor layer located on the second side; wherein the first conduction layer includes a first port portion, a second port portion and a ground portion; wherein the second conduction layer includes a third port portion and a ground portion; wherein a part of the first port portion overlaps a part of the third port portion to form a first resonating couple area, and a part of the second port portion overlaps with another part of the third port portion to form a second resonating couple area; wherein the first port portion and the second port portion form a balanced port, and the third port portion forms an unbalanced port; and wherein the balun is a Marchand balun.