Coaxial RF matching transformer having line sections simultaneous adjustable while retaining a fix transformer line length

摘要

A radio-frequency matching transformer including a wave guide (W) having a fixed length. The waveguide is subdivided into sections (W1, W2) which have different characteristic impedances and the lengths of which are interdependently adjustable. A hollow cylinder is provided within the waveguide displaceable therein such that the operating frequency and the transformation ratio can be adjusted within wide ranges without a conversion of the transformer being required. This results in considerable advantages with respect to the known quarter-wave transformer.