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In this letter, a compact ultra-wideband (UWB) bandpass filter (BPF) with triple notched bands is presented. The basic UWB BPF is realized by feeding a modified multiple-mode resonator (MMR) properly with two aperture-backed interdigital coupled lines. The modified MMR can create five modes in band and two transmission zeros near the lower and upper cutoff frequencies, improving passband selectivity...
A miniaturised dual-band bandpass filter (DB-BPF) centred at 2.45/5.70 GHz using novel symmetric double-spiral resonators is proposed. The measured and simulated results of the proposed DB-BPF are in good agreement with each other except for a slight frequency shift downwards in the measurement. According to the measurements, the measured 3 dB bandwidths are 6.53% (2.35–2.51 GHz) at 2.45 GHz and 4...
In this paper, a novel ultra-wide band (UWB) bandpass filter(BPF) based on combined technology has been detailed researched. The proposed filter is constructed by composite right/left handed transmission line (CRLH TL) and Sierpinski carpet shaped six-staged stepped impedance lines for the first time. CRLH TL are mainly consists of Koch loop shaped defected ground structure (KDGS) etched in the ground...
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