ABSTRACT This paper presents a novel compact ultra-wideband (UWB) bandpass filter (BPF). It consists of two composite right/left-handed transmission line (CRLH-TL) unit cells and an anti-coupled line structure. The CRLH-TL… Click to show full abstract
ABSTRACT This paper presents a novel compact ultra-wideband (UWB) bandpass filter (BPF). It consists of two composite right/left-handed transmission line (CRLH-TL) unit cells and an anti-coupled line structure. The CRLH-TL unit exhibits good passband performance with a compact size. By cascading the anti-coupled line structure, a wide upper stopband is obtained. The measured fractional bandwidth and insertion loss are 113.9% and 0.52 dB, respectively. Moreover, a broad stopband from 14 to 30 GHz with a high rejection level of 20 dB is obtained. The whole size is 14.4 mm × 10.2 mm. The simulated and measured results agree well.
               
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