Lumped circuit elements, statistical analysis, and radio frequency properties of electrical contact

2009 ◽  
Vol 106 (8) ◽  
pp. 084904 ◽  
Author(s):  
W. Tang ◽  
Y. Y. Lau ◽  
R. M. Gilgenbach
Keyword(s):  
Statistical Analysis ◽  
Radio Frequency ◽  
Electrical Contact ◽  
Circuit Elements ◽  
Frequency Properties

scholarly journals Hardware Design of a High Dynamic Range Radio Frequency (RF) Harmonic Measurement System

Instruments ◽  
2018 ◽  
Vol 2 (3) ◽  
pp. 16 ◽  
Author(s):  
Ram Narayanan ◽  
Kyle Gallagher ◽  
Gregory Mazzaro ◽  
Anthony Martone ◽  
Kelly Sherbondy
Keyword(s):  
Radio Frequency ◽  
Measurement System ◽  
High Power ◽  
Nonlinear Distortion ◽  
Dynamic Range ◽  
Low Level ◽  
Rf Systems ◽  
Nonlinear Distortions ◽  
Circuit Elements ◽  
Rf Circuit

Radio frequency (RF) circuit elements that are traditionally considered to be linear frequently exhibit nonlinear properties that affect the intended operation of many other RF systems. Devices such as RF connectors, antennas, attenuators, resistors, and dissimilar metal junctions generate nonlinear distortion that degrades primary RF system performance. The communications industry is greatly affected by these unintended and unexpected nonlinear distortions. The high transmit power and tight channel spacing of the communication channel makes communications very susceptible to nonlinear distortion. To minimize nonlinear distortion in RF systems, specialized circuits are required to measure the low level nonlinear distortions created from traditionally linear devices, i.e., connectors, cables, antennas, etc. Measuring the low-level nonlinear distortion is a difficult problem. The measurement system requires the use of high power probe signals and the capability to measure very weak nonlinear distortions. Measuring the weak nonlinear distortion becomes increasingly difficult in the presence of higher power probe signals, as the high power probe signal generates distortion products in the measurement system. This paper describes a circuit design architecture that achieves 175 dB of dynamic range which can be used to measure low level harmonic distortion from various passive RF circuit elements.

scholarly journals Nanoscale nonlinear radio frequency properties of bulk Nb: Origins of extrinsic nonlinear effects

2015 ◽  
Vol 92 (13) ◽  
Author(s):  
Tamin Tai ◽  
B. G. Ghamsari ◽  
T. Bieler ◽  
Steven M. Anlage
Keyword(s):  
Radio Frequency ◽  
Nonlinear Effects ◽  
Frequency Properties

Resistivity and Radio-Frequency Properties of Two-Generation Trap-Rich Silicon-on-Insulator Substrates

2018 ◽  
Vol 35 (4) ◽  
pp. 047302
Author(s):  
Lei Zhu ◽  
Yong-Wei Chang ◽  
Nan Gao ◽  
Xin Su ◽  
YeMin Dong ◽  
...  
Keyword(s):  
Radio Frequency ◽  
Silicon On Insulator ◽  
Frequency Properties

scholarly journals Radiofrequency renal arteries denervation: effectively and safely

2016 ◽  
Vol 13 (4) ◽  
pp. 13-18
Author(s):  
V A Grigin ◽  
N M Danilov ◽  
Yu G Matchin ◽  
I E Chazova
Keyword(s):  
Blood Pressure ◽  
Renal Function ◽  
Essential Hypertension ◽  
Statistical Analysis ◽  
Renal Artery ◽  
Radio Frequency ◽  
Renal Arteries ◽  
Laboratory Evaluation ◽  
Clinical Blood Pressure

Objective. To determine the possibility of radio frequency denervation of the renal arteries (RDN) in the treatment of patients with refractory essential hypertension (GRA). Materials and methods. The study included 57 patients with a diagnosis of the guide RAG. According to the results of surveys conducted by RDA was performed of 25 patients diagnosed with essential RAG. Within 12 months after the procedure was carried out monitoring of clinical blood pressure (BP), BP monitoring (ABPM), and laboratory evaluation of renal function and renal artery ultrasound. Statistical analysis was performed using Statistica 6.1 program, significant differences were recognized when p

Sign in / Sign up

Export Citation Format

Share Document