Balanced-to-single-ended filtering power dividers

Balanced-to-single-ended filtering power dividers have been used widely in modern communication systems due to their ability of easy connection with balanced and single-ended components simultaneously as well as differential-mode power division, common-mode suppression and filtering function, which is similar to balanced-to-balanced filtering power dividers. The conventional single-ended filtering power divider needs additional baluns to configure the balanced-to-balanced and balanced-to-single-ended filtering power divider, which results in large circuit size. Compared with balanced-to-balanced designs, few balanced-to-single-ended designs are reported. In this paper, two types of balanced-to-single-ended filtering power dividers are proposed and performances of them are compared.