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A new elliptic-function bandpass filter (BPF) is proposed, which utilizes an inter-digital coupled line (IDCPL) as a left-handed transmission line. The IDCPL is employed in order to realize a negative coupling between non-adjacent resonators in a wideband BPF. As the authors' knowledge, the left-handed operations of the IDCPL has rarely utilized before, although the IDCPL itself has been widely used in many microwave circuits without being paid attention to the left-handed operations. Measured results of a 3-5GHz BPF for ultra wideband communication systems (UWB) are also presented in this paper.
Microwave Conference, 2007. KJMW 2007. Korea-Japan
Date of Conference: 15-16 Nov. 2007