Recent advances in photonic integration have propelled microwave photonic technologies
to new heights. The ability to interface hybrid material platforms to enhance light–matter …

Microwave band pass filters play an important function in radio frequency for suppressing
out-of-band emissions that are necessary in today's wireless communication. The study …

Cognitive radio has been widely considered as one of the prominent solutions to tackle the
spectrum scarcity. While the majority of existing research has focused on single-band …

In this study, a novel non-invasive and contactless microwave sensor using a square
substrate integrated waveguide (SIW) re-entrant cavity is proposed for complex permittivity …

In this paper, a tunable bandpass filter using cross-shaped multiple mode resonators
(MMRs) and N: 1 transformer based external quality factor tuning structures is proposed. The …

Two-and four-pole 0.7-1.1-GHz tunable bandpass-to-bandstop filters with bandwidth control
are presented. The bandpass-to-bandstop transformation and the bandwidth control are …

This paper presents a three-pole tunable combline bandpass filter with center frequency,
bandwidth, and zero control. The filter is designed on a Duroid substrate with ε r= 10.2 and …

With advances in telecommunications, an increasing number of services rely on high data
rate spectrum access. These critical services include banking, telemedicine, and exchange …

The prospects for and the state of the art of adaptable RF hardware are reviewed, focusing
primarily on the traditional frequency planning bottleneck, the filtering stages. First, a case is …

This paper presents octave-tunable resonators and filters with surface mounted lumped
tuning elements. Detailed theoretical analysis and modeling in terms of tuning range and …