The design of dual-band active frequency doubler using CRLH transmission lines

摘要

Design of a dual-band frequency multiplier using matching circuits and CRLH transmission lines is presented. A MESFET transistor is used in this design in which an appropriate bias point is determined. Input and output matching circuits are designed based on the constant gain circle and stability condition. For dual-band purpose, CRLH transmission lines are applied. A prototype of the proposed multiplier was fabricated and measured for validity. Obtained results show a good agreement with those of simulations. The proposed multiplier has the advantages of compact size, low cost, the relative constant gain for the whole frequency band and good out of band rejection.