Results 1 to 10 of about 65,144 (166)

A kind of planar waveguides for cheating the high-speed digital signals into misidentifying the characteristic impedance [PDF]

Scientific Reports, 2023
Since a planar periodic transmission line can suppress drastically the electromagnetic coupling, it would be advantageous to use such a kind of transmission lines in solving the problem of miniaturization of circuit area.
Chia Ho Wu, Zhenyu Qian, Wei Wang, Song Tsuen Peng, Chengyang Liu, Jianqi Shen, Donghua Ni, Guoqiang Ye, Fang He, Xiaolong Wang, Linfang Shen, Qichao Li   +11 more
doaj   +2 more sources

The characteristic impedance calculation method of microstrip line and application in embroidered microstrip line

Journal of Industrial Textiles, 2023
Presently, it is difficult to measure the characteristic impedance of embroidered microstrip line for its conductive anisotropy directly. The published work had proposed to use S-parameters to estimate the port impedance of a balanced dipole antenna, and
Yaya Zhang, Haiming Jin, Huating Tu, Yuxin Zuo, Qiulan Luo, Ping Li, Zihan Chen, Jingjing Jia, Linmei Zhang   +8 more
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Empirical equations between characteristic impedance and mechanical properties of rocks

Journal of Rock Mechanics and Geotechnical Engineering, 2020
Based on a great number of experimental data on various mechanical properties of rock in the literature, six empirical equations between the characteristic impedance (product of density and P-wave velocity) and mechanical properties of rock are proposed.
Zong-Xian Zhang, De-Feng Hou, Adeyemi Aladejare   +2 more
doaj   +3 more sources

Aortic Characteristic Impedance and Suspected Mild Cognitive Impairment in a Community‐Based Healthy Population [PDF]

Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease
Background Aging of the proximal aorta can lead to increased pressure and flow pulsatility in the cerebral microcirculation, which may cause cognitive impairment.
Chao‐Feng Liao, Shao‐Yuan Chuang, Hao‐Min Cheng, Chen‐Hua Lin, Chen‐Huan Chen   +4 more
doaj   +2 more sources

Uncertainty of -Parameter Measurements on PCBs due to Imperfections in the TRL Line Standard [PDF]

Journal of Electromagnetic Engineering and Science, 2021
This paper evaluates the uncertainty of S-parameter measurements on multilayer printed circuit boards (PCBs) due to the uncertainties of the dimensions and dielectric properties of the line standard in the Thru-Reflect-Line (TRL) calibration.
Hyunji Koo, Martin Salter, No-Weon Kang, Nick Ridler, Young-Pyo Hong   +4 more
doaj   +1 more source

Semi-Automated Graphical System for Calculating Pulmonary Vascular Impedances in a Clinical Setting

IEEE Open Journal of Engineering in Medicine and Biology, 2021
Goal: Create a semi-automated, graphical, stand-alone application that uses clinically available asynchronous pressure and Doppler velocity captures to rapidly calculate, display, and interpret the pulmonary vascular impedance (PVZ) spectra.
Timothy Bachman, Kang Kim, Marc Simon
doaj   +1 more source

Computation of the Characteristic Parameters of Coaxial Waveguides Used in Precision Sensors

Sensors, 2023
This paper presents a fast and computationally stable analytical algorithm used to perform the characteristic impedance of cylindrical multilayer waveguides used in high-precision sensors and apparatuses.
Krzysztof Kubiczek
doaj   +1 more source

A Tunable low Pass Filter Based on Transmission Lines With Tunable Input/Output Impedance

Frontiers in Physics, 2022
A tunable low pass filter (TLPF) based on the tuning of input/output impedance was presented in this letter. The TLPF mainly consisted of improved quarter-wavelength stubs.
Zhonghai Zhang, Yuekai Zhao, Lin Chen, Zhihua Fang, Aiting Wu, Pengquan Zhang   +5 more
doaj   +1 more source

Precision Calculations of the Characteristic Impedance of Complex Coaxial Waveguides Used in Wideband Thermal Converters of AC Voltage and Current [PDF]

International Journal of Electronics and Telecommunications, 2022
The article presents precision and numerically stable method of calculation of the characteristic impedance of cylindrical multilayer waveguides used in high-precision wideband measuring instruments and standards, especially calculable thermal converters
Krzysztof Kubiczek, Marian Kampik
doaj   +1 more source

Investigation of the Two-Mode Regime of Two-Gap Photonic-Crystal Resonance Systems Produced on a Printed Circuit Board with Fractal Elements "Minkowski Island

Известия высших учебных заведений России: Радиоэлектроника, 2021
Introduction. The development of new amplifiers and generators of the Ku- and K-bands (12…27 GHz) for use in onboard equipment is increasingly attracting research interest.
V. A. Tsarev, A. Yu. Miroshnichenko, A. V. Gnusarev, N. A. Akafyeva   +3 more
doaj   +1 more source