| 摘要 |
The present invention is directed to a coupler structure that includes a first, second, third and fourth ports. L first transmission line layers are disposed on a first dielectric material between the first port and the second port, each conforming to a predetermined geometric configuration, where L is an integer. M second transmission line layers are disposed on a second dielectric material between the third port and the fourth port in alternating layers with the L first transmission line layers, forming a total of N transmission line layers within the structure. M and N are integers and N is greater than or equal to three. Each second transmission line layer includes a second transmission line substantially conforming to the predetermined geometric configuration, disposed in a predetermined position relative to a corresponding first transmission line within the structure.
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