The paper presents an improved tuning method implemented for a differential active inductor based RF bandpass filter. Derived from a previous designed transistor-only second order filter topology, independent frequency and quality factor tuning are demonstrated in 0.18 μm CMOS technology. The circuit has been basically designed for a maximum frequency of 2.4 GHz, high enough to cover the main w...

This paper presents the design of a microstrip ultra-wideband (UWB) bandpass filter that exhibits desirable characteristics low-loss, high selectivity, wide stopband and out-of-band rejection at room temperature. These are normally achieved with temperature superconductor filters require cryogenic cooling. The proposed was realized by exciting multiple resonant modes in unique Z-shaped resonato...

An ultra-wide band band-pass filter using novel spiral stub-loaded triple-mode resonator (SSLTMR) is presented. New spiral stub loaded resonator is analyzed with odd and even modes analysis for this class of BPF, achieving higher band wide and size reduction. In order to have a good response characterized, two (SSL-TMRs) and two quarter wavelength digital coupled lines are used. This new design...

A novel bandpass filter (BPF) based on the composite right/left-handed (CRLH) material and 0◦ feeding structure is proposed. With multiple unit-cells cascaded, the new section comprises the series interdigital capacitors and the shunt short-circuited stub inductors in the symmetric configuration. The circuit is designed to be unbalanced, a tunable gap between left handed and right handed modes ...