This paper presents the design and experimental research of a high efficiency balanced frequency tripler in the whole Ka band incorporating compensation solder pads. An anti-parallel GaAs Flip-Chip varistor diode is applied in this frequency tripler. The frequency tripler has the advantages of low conversion loss, broadband and compact circuit size. Considering the parasitic parameters resulted by the actual pads of the nonlinear device, a compensation solder pad was developed and adopted. The conversion loss of the frequency tripler is 15 dB with variation of ±1 dB across the output frequency from 30 to 37.5 GHz. In experiment, the maximum output power of 5.8 dBm is obtained at 35.4 GHz with 3.8% conversion efficiency when the input power is 20 dBm, and the 3-dB operation band width is about 10 GHz, which shows a good agreement between the simulation results and the experimental results.
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