Abstract Nonlinear propagation in periodic media has been studied for decades, yielding demonstrations of numerous phenomena including strong temporal compression and slow light generation. Gap solitons, that propagate at frequencies inside the stopband, have observed optical fibres but elusive photonic chips. In this manuscript, we investigate nonlinear pulse a chip-based Bragg grating stopban...

This article presents a dual-band filtering power amplifier (DB-FPA) with extended passband bandwidths and wide stopband rejection, which is helpful in reducing the number of microwave components radio frequency front end, resulting compact circuit size low loss. In designed DB-FPA, wideband low-pass filter applied as input matching network (IMN) to provide impedance good while transformation a...

A novel compact ultra wideband (UWB) bandpass filter (BPF) based on composite right/left handed transmission line (CRLH TL) is reported in this paper. The proposed UWB BPF is designed and developed by coupling of two unit-cells of via-less CRLH TL, excited by asymmetrical coplanar waveguide (CPW) feed-line. The unit cell of CRLH TL is designed using series interdigital capacitor (IDC) in shunt ...

In this investigation, an ultra-compact dual-mode bandpass filter (BPF) with a wide stopband response is realized by using half-mode substrate-integrated rectangular cavity (HMSIRC). The HMSIRC resonator designed that in shape and has metallic vias along three of the sides. fourth side open-ended contains microstrip feed lines. For purpose constructing magnetic wall, slot cut into each HMSIRC’s...

Compact symmetrical four-ports differential bandpass filters with good common-mode suppressions are proposed in this work. The presented filters are designed based on half-wavelength coupled resonators with compact size, good filtering responses for differentialmode, and wide common-mode suppression range. To further improve the common-mode performances within the differential-mode passband, T-...

In this paper, a compact and high isolation microstrip diplexer is designed for broadband and wireless local area network (WLAN) application, simultaneously. The bandpass filter (BPF) for broadband channel is formed by three-coupled-line structure and two short stubs with different size loaded in 50 Ω feed lines, and the BPF for WLAN channel consists of two coupling quarter-wavelength resonator...

A plate silencer consists of an expansion chamber with two side-branch cavities covered by light but extremely stiff plates. It works effectively with a wide stopband from low-to-medium frequencies only if the plate is extremely stiff, to ensure a strong reflection of acoustic wave to the upstream in the duct. However, a plate with a slightly weak bending stiffness will result in non-uniform tr...

An Ultra-wideband (UWB) bandpass filter (BPF) based on an elliptical open stub-loaded resonator (EOSLR) and dumbbell-sided cross-circle (DSCC) defected ground structure (DGS) is proposed in this paper. The measured results show that the 3 dB bandwidth of 3.49 ∼ 11.04 GHz, skirt factor (S.F) 0.844, upper stopband rejection greater than 20 d B at 11.70 26.80 width 15.1 GHz. has advantages high se...

In this paper, a high gain and directional coplanar waveguide (CPW)-fed ultra-wideband (UWB) planar antenna with new frequency selective surface (FSS) unit cells design is proposed for UWB applications. The was designed based on the Mercedes artistic-shaped (MAP) antenna. consisted of circular ring embedded three straight legs impedance bandwidth improvement. modelled FSS used integration two p...

This paper addresses the efficient computation of frame bounds for cosine-modulated filterbanks. We derive explicit expressions for the eigenvalues of the frame operator that can be easily computed from the prototype's polyphase components. The number of channels and the downsampling factor may be even or odd, and the oversampling factor is supposed to be an integer. The analysis of low-delay, ...