Development of Single Measurement Setup to Test S-Parameters and Distortions of Microwave Devices

2020 ◽  
Author(s):  
Raja Usman Tariq ◽  
Ming Ye ◽  
Yongning He
Keyword(s):  
Microwave Devices ◽  
Single Measurement ◽  
S Parameters

scholarly journals A Measurement of Non-Coaxial RF Devices with Improved TRL Calibration Algorithm

2018 ◽  
Vol 173 ◽  
pp. 01005
Author(s):  
Chen Shouhong ◽  
Wang Zhuang ◽  
Ma Jun ◽  
Hou Xingna
Keyword(s):  
Performance Test ◽  
Design System ◽  
Microwave Devices ◽  
Test Fixture ◽  
The Real ◽  
S Parameters ◽  
Final Design ◽  
Calibration Algorithm ◽  
Rf Devices ◽  
Rf Microwave

In order to test the S-parameters of non-coaxial RF (Radio Frequency) devices accurately, using, ADS (Advanced Design System) to simulate and design a set of fixture and calibration pieces for noncoaxial, RF device performance test, and the calibration pieces is used to calibrate the test fixture, remove, the error introduced by the fixture, and obtain the real S parameters of non-coaxial RF microwave devices.,Based on the study of various parameters of RF microwave devices, the Engen's TRL (Thru-Reflect-Line), calibration algorithm is studied in depth. An improved TRL calibration algorithm is proposed. And the use, of MATLAB program to achieve two calibration algorithms to correct the system error introduced by the measuring fixture, so as to get the real performance parameters of the device under test. Through the test of, the verification device, the agreement between the improved TRL algorithm and Engen's TRL algorithm is verified. The final design of the test fixture can be successfully applied to the network analyzer for noncoaxial, RF devices S-parameter measurement.

scholarly journals Residue-Pole Methods for Variability Analysis of S-parameters of Microwave Devices with 3D FEM and Mesh Deformation

2020 ◽  
Vol 29 (1) ◽  
pp. 10-20
Author(s):  
M. R. Rufuie ◽  
A. Lamecki ◽  
P. Sypek ◽  
M. Mrozowski
Keyword(s):  
Mesh Deformation ◽  
Microwave Devices ◽  
3D Fem ◽  
Variability Analysis ◽  
S Parameters

Unified small-signal-noise model for active microwave devices

1993 ◽  
Vol 140 (1) ◽  
pp. 55 ◽  
Author(s):  
Z.R. Hu ◽  
Z.M. Yang ◽  
V.F. Fusco ◽  
J.A.C. Stewart
Keyword(s):  
Noise Model ◽  
Microwave Devices ◽  
Small Signal ◽  
Signal Noise

Single measurement of hemoglobin predicts outcome of HCC patients

2014 ◽  
Vol 52 (01) ◽  
Author(s):  
F Finkelmeier ◽  
D Bettinger ◽  
V Köberle ◽  
M Schultheiß ◽  
B Kronenberger ◽  
...  
Keyword(s):  
Single Measurement

Reliability of a Single β-Thromboglobulin Measurement in a Diabetic Population : Importance of PGE1 in Anticoagulant Mixture

1987 ◽  
Vol 57 (02) ◽  
pp. 201-204 ◽  
Author(s):  
P Y Scarabin ◽  
L Strain ◽  
C A Ludlam ◽  
J Jones ◽  
E M Kohner
Keyword(s):  
In Vitro Release ◽  
Mean Value ◽  
Reliable Estimate ◽  
Diabetic Patients ◽  
Single Measurement ◽  
Diabetic Population ◽  
The Difference ◽  
Vitro Release

SummaryDuring the collection of samples for plasma β-thromboglobulin (β-TG) determination, it is well established that artificially high values can be observed due to in-vitro release. To estimate the reliability of a single β-TG measurement, blood samples were collected simultaneously from both arms on two separate occasions in 56 diabetic patients selected for a clinical trial. From each arm, blood was taken into two tubes containing an anticoagulant mixture with (tube A) and without (tube B) PGE!. The overall mean value of B-TG in tube B was 1.14 times higher than in tube A (p <0.01). The markedly large between-arms variation accounted for the most part of within-subject variation in both tubes and was significantly greater in tube B than in tube A. Based on the difference between B-TG values from both arms, the number of subjects with artifically high B-TG values was significantly higher in tube B than in tube A on each occasion (overall rate: 28% and 14% respectively). Estimate of between-occasions variation showed that B-TG levels were relatively stable for each subject between two occasions in each tube. It is concluded that the use of PGEi decreases falsely high B-TG levels, but a single measurement of B-TG does not provide a reliable estimate of the true B-TG value in vivo.

Marginal RF Gain Investigation and Root Cause Determination

2013 ◽  
Author(s):  
Keith Harber ◽  
Steve Brockett
Keyword(s):  
Radio Frequency ◽  
Failure Analysis ◽  
Power Amplifier ◽  
Physical Analysis ◽  
Root Cause ◽  
S Parameter ◽  
Mode Of Operation ◽  
S Parameters

Abstract This paper outlines the failure analysis of a Radio Frequency only (RF-only) failure on a complex Multimode Multiband Power Amplifier (MMPA) module, where slightly lower gain was observed in one mode of operation. 2 port S-parameter information was collected and utilized to help localize the circuitry causing the issue. A slight DC electrical difference was observed, and simulation was utilized to confirm that difference was causing the observed S-parameters. Physical analysis uncovered a very visible cause for the RF-only failure.

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