Abstract: A coaxial plug for use in a junction between a coaxial conductor located externally of an apparatus box and a stripline with a conductive ground plane located within the box. The stripline and ground plane are arranged on a respective side of an insulating plate. A center pin of the coaxial plug is for connection with the stripline and a conductive outer casing of the coaxial plug is for connection with the ground plane. An impedance - correct junction, which is short in relation to the wavelength of the transmitted signal, can be obtained without the need to solder or glue the conductors. The coaxial plug is provided with an outwardly protruding part which extends from one end wall of the plug in contact with the conductive outer casing thereof and which presents an at least substantially planar surface which enables connections in the junction to be made by so-called bonding techniques.

Abstract: A sampling circuit for microwave signals includes a substrate (S), a planar microwave guide (PL) on one side of the substrate and a conductive surface on the other. A slotline is formed by a rectangular insulating area (B) on the other side, and a drive pulse conductor (KX) is connected to opposite edges of the insulating area for supplying the sampling pulses. On one side of the substrate there are two separate conductive surfaces (A1,A2), which together with the conductive surface (A) on the other side forms the capacitors included in the sampling circuit. Two discrete diodes (D1,D2) are connected between the microwave guide and the respective surface (A1,A2), and resistors (R1,R2) are connected between these surfaces and planar output waveguides (UL1,UL2) for the sampling circuit.