Novel active compound combinations comprising a carboxamide of the general formula in whichA, R1, R2 and R3 are as defined in the description,and the active compound groups to listed in the description have very good fungicidal properties. At least one integral hinge at the narrow end joins medial portions of the opposed sides along a singular fold line. The output section includes a first base-coupled transistor pair adapted to receive an input signal at emitters of the first base-coupled transistor pair, receive a bias signal at bases of the first base-coupled transistor pair, and provide an output signal at collectors of the first base-coupled transistor pair. A slot array antenna of the present invention can be used in a plasma processing apparatus to increase the plasma density in the plasma-processing chamber.