The dispersion relation is derived for the most general configuration of a passive and reciprocal periodically loaded transmission line in a unique and simple form by introducing two novel parameters. Based on this relation, the phase and group velocities are determined and a simple condition for phase reversal propagation is obtained. The two above mentioned parameters help us to develop a pol...

A new design method of the dual-band balanced bandpass filter (BPF) using multilayer packaging dual-mode substrate integrated waveguide (SIW) cavities is proposed. Split-type coupling topology based on resonators developed for design. Firstly, a single-band with perturbed metal vias designed. The TE201 mode and TE202 by can form passband. Secondly, an additional SIW cavity same placed in lower ...

Fractal geometries are found attractive to designers seeking for compact size microwave circuits and antennas. In this paper, Peano fractal based open-loop resonators are adopted to design dual-band microstrip band-stop filters (PSFs). The suggested filter structure is essentially based on that of the conventional open-loop rectangular microstrip resonators. The resonators of the proposed PSF s...

The miniaturization of microwave filters based on planar technology are important issue for integrated and miniaturized transceiver front-ends. In this view, a novel design method using metamaterials showed the possibility of a compact size filter. In the last decade, these can be realized through electronic band gap (EBG) structure and Left-handed material having negative permeability and nega...

The low pass filter is used in many application of microwave communication. Therefore it is necessary to design a good low pass filter for the faithful reproduction of wanted signals. Previously used methods to design the low pass filter using insertion loss method don’t give a very good flat response. So, a new method has been proposed for the filter design which gives a good response as compa...

The authors report a novel approach for designing tunable and reconfigurable bandstop filters by employing bias-free optically-controlled photoconductive radio frequency (RF) switching elements. To verify the effectiveness of approach, filter with two stopbands centred at 4.05 4.75 GHz was designed using split-ring-coupled microstrip transmission line on RO3010 substrates. enable reconfigurabil...