Percolative cobalt/silicon nitride composites with tunable negative electromagnetic parameters

RSC Advances ◽  
2016 ◽  
Vol 6 (86) ◽  
pp. 82478-82483 ◽  
Author(s):  
Zi-dong Zhang ◽  
Chuan-bing Cheng ◽  
Xu Han
Keyword(s):  
Silicon Nitride ◽  
Electromagnetic Shielding ◽  
Band Pass Filter ◽  
Electromagnetic Parameters ◽  
Pass Filter ◽  
Potential Applications ◽  
Band Pass

A 3D fishnet structure is formed in the Co/Si3N4 composites to obtain tunable negative electromagnetic parameters from 550 MHz to 1 GHz, which have potential applications in antennas, electromagnetic shielding and band-pass filter.

scholarly journals A Band-Pass Filter Based on Half-Mode Substrate Integrated Waveguide and Spoof Surface Plasmon Polaritons

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Lei Zhao ◽  
Yuan Li ◽  
Zhao-Min Chen ◽  
Xin-Hua Liang ◽  
Jun Wang ◽  
...  
Keyword(s):  
Surface Plasmon ◽  
Surface Plasmon Polaritons ◽  
Band Pass Filter ◽  
Substrate Integrated Waveguide ◽  
Pass Filter ◽  
Microwave Frequencies ◽  
Potential Applications ◽  
Band Pass ◽  
Plasmon Polaritons ◽  
Spoof Surface Plasmon Polaritons

Abstract In this paper, a band-pass filter based on half-mode substrate integrated waveguide (HMSIW) and double-layer spoof surface plasmon polaritons (SSPPs) consisting of two corrugated metal strips is proposed, which can realize band-pass transmission by etching periodic grooves at the top and bottom metal layers of the HMSIW. Moreover, the influences of important parameters on the performance of the proposed band-pass filter are analyzed by parametric study. By changing the key parameters, the low and high cut-off frequency can be controlled independently. The corresponding equivalent circuit of the proposed band-pass filter is put forward to explain the physical mechanism. Compared with the previous structures, this structure features smaller size, wider bandwidth and lower loss. Simulated results show that the proposed band-pass filter achieves a bandwidth (for |S11| < −10 dB and |S21| > −0.8 dB) of about 69.77% (15.6–32.1 GHz). The measured results have good agreements with the simulated ones, which verify that the proposed band-pass filter has good performances and potential applications at the microwave frequencies.

A band-pass plasmonic filter with dual-square ring resonator

2014 ◽  
Vol 28 (23) ◽  
pp. 1450188 ◽  
Author(s):  
Gaoyan Duan ◽  
Peilin Lang ◽  
Lulu Wang ◽  
Li Yu ◽  
Jinghua Xiao
Keyword(s):  
Ring Resonator ◽  
Band Pass Filter ◽  
The Finite Element Method ◽  
Pass Filter ◽  
Fem Method ◽  
Metal Insulator Metal ◽  
Integrated Optical ◽  
Potential Applications ◽  
Band Pass ◽  
Optical Circuits

In this paper, we show the simulation of a plasmonic band-pass filter which consists of two surface plasmon polaritons (SPPs) waveguides and a resonator in metal–insulator–metal (MIM) structure. The resonator is formed by two square rings and a patch between them. The patch is a tiny rectangle cavity in order to transfer the SPPs from one ring to the other. The finite element method (FEM) method is employed in simulation. The results show that the dual-ring resonator performs better than a single ring does. The 3 dB bandwidth near the peak wavelength λ = 1054 nm is merely 31.7 nm. The resonant wavelength can be shifted by changing the side length of the square ring. This narrow band-pass filter is easy to fabricate and has potential applications in future integrated optical circuits.

OBSERVATION AND SIMULATION OF TSUNAMIS INDUCED BY THE 2003 TOKACHI-OKI EARTHQUAKE (M 8.0)

2015 ◽  
Vol 2 (3) ◽  
Author(s):  
Tatsuo Ohmachi ◽  
Shusaku Inoue ◽  
Tetsuji Imai
Keyword(s):  
Rayleigh Wave ◽  
Water Pressure ◽  
Near Field ◽  
Source Region ◽  
Tsunami Source ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Tsunami Simulation ◽  
Sea Bed ◽  
Band Pass

The 2003 Tokachi-oki earthquake (MJ 8.0) occurred off the southeastern coast of Tokachi, Japan, and generated a large tsunami which arrived at Tokachi Harbor at 04:56 with a wave height of 4.3 m. Japan Marine Science and Technology Center (JAMSTEC) recovered records of water pressure and sea-bed acceleration at the bottom of the tsunami source region. These records are first introduced with some findings from Fourier analysis and band-pass filter analysis. Water pressure disturbance lasted for over 30 minutes and the duration was longer than those of accelerations. Predominant periods of the pressure looked like those excited by Rayleigh waves. Next, numerical simulation was conducted using the dynamic tsunami simulation technique able to represent generation and propagation of Rayleigh wave and tsunami, with a satisfactory result showing validity and usefulness of this technique. Keywords: Earthquake, Rayleigh wave, tsunami, near-field

A comparative study on the demodulation capability of a single loop optoelectronic oscillator with and without a dynamic band Pass filter

Optik ◽  
2021 ◽  
Vol 226 ◽  
pp. 165924
Author(s):  
Shantanu Mandal ◽  
Kousik Bishayee ◽  
Arindum Mukherjee ◽  
B N Biswas ◽  
Chandan Kumar Sarkar
Keyword(s):  
Comparative Study ◽  
Band Pass Filter ◽  
Optoelectronic Oscillator ◽  
Pass Filter ◽  
Single Loop ◽  
Band Pass
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