Abstract

This letter presents a miniaturized dual-mode composite- right/left-handed line resonator with wide harmonic suppression. The pure right-handed microstrip transmission line adopt 36 - electrical length instead of 90 - , thus the size of the dual-mode fllter can be reduced signiflcantly meanwhile the spurious response suppression are improved efiectively. A prototype fllter is designed and implemented at 730MHz, which not only has a size reduction of 92% against a conventional dual-mode fllter, but also exhibits harmonic suppression characteristics over a decade bandwidth.

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