The cognitive radio paradigm for developing next-century wireless communication systems
is rapidly entering the mainstream, and various aspects of it are currently being applied in …

In this brief, a dual-mode dual-band filter based on half-mode substrate integrated
waveguide (HMSIW) is presented. The proposed filter has the capability to tune the two pass …

An original and simple approach to the design of fully reconfigurable multi-band microwave
bandpass filters (BPFs) with an arbitrary number of passbands is reported in this paper. It …

In this brief, a reconfigurable filter is proposed for simultaneous usage as ultra-wideband
and wideband filters. The ultra-wideband (UWB) section is designed by constructing three …

This paper presents a new class of multi-stub loaded resonators with flexibly controlled
resonance modes, which are suitable for both tunable and nontunable filter applications …

Based on a novel microstrip terminated cross-shaped resonator (TCSR), the dual-band
bandpass filters (DB-BPFs) with fixed and reconfigurable bandwidths are proposed in this …

This paper reports on tunable 2-and 3-pole bandpass filters with a wide frequency tuning
range (tuning ratio> 3) and a constant bandwidth using switchable varactor-tuned …

In this paper, a tunable dual-band bandpass-to-bandstop filter and its analysis are
proposed. The bandpass-to-bandstop transformation could be obtained by changing the …

This paper reports on the RF design of fully reconfigurable quasi-elliptic-type single-and
multi-band microwave bandpass filters (BPFs) and duplexers. They are based on series …

This paper presents a new kind of highly flexible frequency-agile bandpass filters (FA-BPFs)
based on the novel synchronously tuned dual-mode resonator (STDR). The bandwidth …