Patent ID: 6903700

Claim:
A high frequency circuit substrate comprising: a first high frequency circuit substrate including at least a first dielectric material layer, a first conductor layer, a second dielectric material layer and a second conductor layer, which are laminated in the named order, said first conductor layer having a first slot formed therein, and said second conductor layer forming a feeder line; a second high frequency circuit substrate including at least a third dielectric material layer, a third conductor layer, a fourth dielectric material layer and a fourth conductor layer, which are laminated in the named order, said third conductor layer having a second slot formed therein, and said fourth conductor layer forming a transmission line, said first high frequency circuit substrate and said second high frequency circuit substrate being stacked to each other in such a manner that said first dielectric material layer and said third dielectric material layer are positioned adjacent each other and said first slot and said second slot are directly electromagnetically coupled to each other.