Design of a novel triband bandpass filter is presented for wireless communications systems. The based on inter-coupled stepped impedance resonators and inter-digitally coupled to the input/output ports. configuration circuit consists open-loop that are electromagnetically each other using inverted T-shaped open stubs. intrinsic characteristics structure generates five transmission zeros results...

Hot ring rolling is a highly nonlinear, unsteady-state and asymmetry process which is affected by many parameters. The friction coefficient between the ring ,the driver roll and the idle roll is one of the problems, which has significant effect on the quality of final product. In this study, the effect of these two parameters on hot ring rolling was investigated based on a 3D coupled-thermo mec...

In this letter, a compact ultra-wideband (UWB) bandpass filter based on CPW-tomicrostrip transition structure is proposed. Compared with traditional UWB BPF using hybrid structures, the proposed filter has a more sharp selectivity due to a transmission zero located at the lower edge of the passband generated by the combined effect of both CPW-MS-CPW and interdigital coupling line (ICL). Moreove...

This paper presents a new ultra-wideband (UWB) bandpass filter (BPF) with sharp roll-off and dual-notched bands. The filter consists of a triangle ring multi-mode resonator (MMR) with the stub-loaded resonator (SLR) for controlling the two transmission zeros at 2.8 / 11 GHz, the embedded open-circuited stub and the asymmetric tight coupled input/output (I/O) lines for introducing the dual notch...

In this letter, a three-dimensional (3-D) wide passband frequency selective surface (FSS) is proposed. Compared with planar FSSs, 3-D structures usually present superior roll-off characteristics, especially under lower frequency. However, wideband FSSs typically have greater insertion loss in the passband, and transmission characteristic sensitive to angle of incident electromagnetic wave. The ...