A Design of Frequency Multipliers Using λ/4 Open Composite Right/Left Handed Stub and Left Handed Transmission Line

A novel frequency multiplier using composite right/left-handed transmission line is proposed. The left-handed transmission line in the proposed frequency multiplier suppresses the fundamental component(), while the composite right/left-handed open stub diminishes unwanted harmonics. Due to the combination of the left-handed transmission line and composite right/left-handed open stub, the only desirable multiplied frequency component such as 3 and 4 are obtained at the output port excellently. For the example of the proposed design, frequency multipliers are designed at 1 GHz of and measured. The measured output power of 3 and 4 is -5.67 dBm and -6.43 dBm, respectively, when the fundamental input power was 0 dBm.