Power tube test fixture and preparation method thereof

The invention belongs to the technical field of semiconductor radio frequency circuits, and relates to a power tube test fixture and a preparation method thereof, the power tube test fixture comprisesa base, a circuit board and at least two joints, and a groove is arranged in the middle of the top layer of the base; each side of the circuit board comprises an impedance conversion line, an L-shaped microstrip line, a blocking element, a bias element, a decoupling element and a microstrip line with a through hole; a blocking element which is separated from the first port of the impedance conversion line by a preset distance is installed on the impedance conversion line, the second port of the impedance conversion line is connected with an L-shaped microstrip line through a biasing element,and the L-shaped microstrip line is connected with a microstrip line with a through hole through a decoupling element; the at least two joints are respectively fixed on two sides of the top layer of the base, and leads of the