Patent ID: 7015772

Claim:
A combiner comprising: a) a first printed circuit board having a top surface and a bottom surface; b) a first metallized area substantially covering the bottom surface of the first printed circuit board; c) a first circuit line located on the top surface, the first circuit line having a first end and a second end; d) a second circuit line located on the top surface, the second circuit line having a first end and a second end; e) the first ends of the first and second circuit lines connected to an output port, the output port being spaced away from an edge of the first printed circuit board; f) a first input port connected to the first circuit line second end, the first input port being spaced away from the edge of the first printed circuit board; g) a second input port connected to the second circuit line second end, the second input port being spaced away from the edge of the first printed circuit board; h) a second printed circuit board having a top surface and a bottom surface, the second printed circuit board mounted over the first printed circuit board; i) a second metallized area substantially covering the top surface of the second printed board; and j) a plurality of non-metallized voids located in the second metallized area above the first and second circuit lines, the non-metallized voids adapted to change the amplitude unbalance of the combiner.