Abstract
In this article, computer-aided design of a broadband single balanced waveguide mixer covering full K-band (18 to 26.5 GHz) is presented. Emphasis has been given on simple design approach of the mixer using commercially available CAD (computer-aided design) tools. The mixer circuit is implemented on suspended stripline etched on soft substrate that is integrated with RF (radio frequency) and LO (local oscillator) waveguides. Conversion loss of 6-8 dB with 8.5 GHz instantaneous IF (intermediate frequency) bandwidth has been achieved with þ10 dBm LO power at 35 GHz and the RF swept from 18 to 26.5 GHz. A systematic design approach of the mixer is presented with its simulated and experimental results. V C 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:586-588, 2011; View this article at wileyonlinelibrary.com. DOI 10.1002/mop.25759
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