A de-embedding technique for reflection-based S-parameters measurements of microwave devices

2002 ◽  
Author(s):  
F.M. Ghannouchi ◽  
A. Brodeur ◽  
F. Beauregard
Keyword(s):  
Microwave Devices ◽  
Embedding Technique ◽  
S Parameters

Extraction of device S-parameters within board by using a TRL de-embedding technique

2018 ◽  
Vol 60 (11) ◽  
pp. 2647-2651
Author(s):  
Kassem Hamze ◽  
Daniel Pasquet ◽  
Philippe Descamps ◽  
Edouard De Ledinghen
Keyword(s):  
Embedding Technique ◽  
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

Visualization of the Platelet-Plasma Interface

1977 ◽  
Vol 35 ◽  
pp. 494-495
Author(s):  
D. C. Brindley ◽  
M. McGill
Keyword(s):  
Platelet Rich Plasma ◽  
Coagulation Factors ◽  
Platelet Membrane ◽  
Rabbit Platelet ◽  
Surface Coat ◽  
Special Relationship ◽  
Routine Method ◽  
Embedding Technique ◽  
Biochemical Analyses ◽  
Adsorptive Properties

Morphological and cytochemical studies of platelets have reported a surface coat, or glycocalyx, external to the plasma membrane (1). Biochemical analyses have likewise confirmed the highly adsorptive properties of platelets as transporters of coagulation factors (2). However, visualization of the platelet membrane by conventional EM procedures does not reflect this special relationship between the platelet and its plasma environment. By the routine method of alcohol-propylene oxide dehydration for Epon embedding, the lipid bilayer nature of the platelet membrane appears similar to other blood cells (Fig. 1). A new rapid embedding technique using dimethoxypropane (DMP) as dehydrating agent (13) has permitted ultrastructural analyses of the surface features of the platelet-plasma interface.Aliquots of human or rabbit platelet-rich plasma (PRP) were added to equal volumes of 6% glutaraldehyde in Millonig's buffer at 37° for 45 minutes, rinsed in buffer and postfixed in 1% osmium in Millonig's buffer for 45 minutes.

Flat embeddment of monolayer cells, tissue sections, and other cellular materials attached onto glass substrate

1990 ◽  
Vol 48 (3) ◽  
pp. 766-767
Author(s):  
Jeffrey P. Chang ◽  
Jaang J. Wang
Keyword(s):  
Present Report ◽  
Cellular Materials ◽  
Cover Glass ◽  
Tissue Sections ◽  
Embedding Technique ◽  
Exfoliated Cells ◽  
Black Paper ◽  
Cell Concentrations ◽  
Flat Embedding

Flat embeddment of certain specimens for electron microscopy is necessary for three classes of biological materials: namely monolayer cells, tissue sections of paraffin or plastics, as well as cell concentrations, exfoliated cells, and cell smears. The present report concerns a flat-embedding technique which can be applied to all these three classes of materials and which is a modified and improved version of Chang's original methodology.Preparation of coverglasses and microslides. Chemically cleaned coverglasses, 11 × 22 mm or other sizes, are laid in rows on black paper. Ink-mark one coner for identifying the spray-side of the glass for growing cells. Lightly spray with Teflon monomer (Heddy/Contact Inductries, Paterson, NO 07524, U.S.A.) from a pressurized can. Bake the sprayed glasses at 500°F for 45 min on Cover-Glass Ceramic Racks (A. Thomas Co. Philadelphia), for Teflon to polymerize.Monolayer Cells. After sterilization, the Teflon-treated coverglasses, with cells attached, are treated or fixed in situ in Columbia staining dishes (A. Thomas Co., Philadelphia) for subsequent processing.

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