Abstract
In this paper, the characteristics of novel modifled composite right/left-handed (CRLH) transmission lines are discussed, and an ultra-wideband (UWB) bandpass fllter (BPF) using the modifled CRLH transmission lines is presented. Design formulas of a novel modifled CRLH unit cell are theoretically derived. Based on the design formulas, the UWB bandpass fllter with three unit cells is designed, fabricated, and measured. The measurement results show that the UWB bandpass fllter has an insertion loss of less than 1dB, bandwidths of 2:9 » 49GHz, and a rejection of greater than 50dB at 5.8GHz.
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