Method for designing ultrahigh-frequency broadband linearizer

The invention provides a method for designing an ultrahigh-frequency broadband linearizer. The linearizer comprises a 3dB directional coupler, a nonlinear load and a matching network. The design method comprises the following steps: step 1, giving gain compensation amounts and phase compensation amounts required by the linearizer at different frequencies; step 2, obtaining impedance values of thenon-linear load at different frequencies under different input powers through measurement, and converting the impedance values of the non-linear load into admittance values of the non-linear load; step 3, according to the admittance value of the non-linear load, obtaining a port impedance value required by the matching network under the condition of meeting the gain compensation amount and the phase compensation amount given in the step 1 through an optimization method; and step 4, designing a matching network according to the port impedance value. According to the invention, the design methodof the linearizer for giv