A broadband self-biased monolithic frequency doubler for X-band application

A broadband monolithic single-ended active frequency doubler fed by a single positive DC power supply is presented. The effects of the self-bias approach on the doubler performances are investigated and a design method is proposed. Measured performances demonstrate the competitiveness of the proposed circuit with respect to more traditional doublers. © 2003 Wiley Periodicals, Inc. Microwave Opt Technol Lett 37: 67–69, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10827