Frequency-Dependent Dielectric Constant and Loss Tangent Characterization of Thin Dielectrics Using a Rapid Solver

2007 ◽  
Author(s):  
A. Ege Engin ◽  
Abdemanaf Tambawala ◽  
Madhavan Swaminathan ◽  
Swapan Bhattacharya ◽  
Pranabes Pramanik ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Loss Tangent ◽  
Frequency Dependent ◽  
Dielectric Constant And Loss ◽  
Thin Dielectrics

Dielectric Constant and Loss Tangent Characterization of Thin High-K Dielectrics Using Corner-to-Corner Plane Probing

2006 ◽  
Author(s):  
A. Ege Engin ◽  
Abdemanaf Tambawala ◽  
Madhavan Swaminathan ◽  
Swapan Bhattacharya ◽  
Pranabes Pramanik ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Loss Tangent ◽  
Dielectric Constant And Loss ◽  
High K

Automated Complex Permittivity Characterization of Ceramic Substrates Considering Surface-Roughness Loss

2012 ◽  
Vol 2012 (CICMT) ◽  
pp. 000613-000620
Author(s):  
A. Ege Engin ◽  
Pavithra Pasunoori
Keyword(s):  
Dielectric Constant ◽  
Loss Tangent ◽  
Complex Permittivity ◽  
Cavity Resonator ◽  
New Method ◽  
Cavity Resonators ◽  
Ceramic Substrates ◽  
Dielectric Constant And Loss ◽  
Side Walls

This paper presents a new method to extract the frequency-dependent dielectric constant and loss tangent of ceramic substrates from high frequency measurements of cavity resonators. A cavity resonator can simply be realized using two ground planes connected with vias to form the side walls. Recently, a rapid plane solver has been developed to efficiently and accurately simulate cavity resonators and extract materials properties by manually fitting simulations to measurements. In this paper, we will demonstrate how the fitting process can be automated. In order to extract the dielectric constant and loss tangent, many simulations need to be run to find the parameters that provide the best match with the measurements. This is a computationally expensive approach. We will present a new method based on tracking sensitivity, which provides a parameterized macromodel for the resonators. Using this approach, the simulation data can be expressed as a low-order rational function of the complex permittivity. Hence, varying the complex permittivity to find the best fit can be done in negligible time after the macromodel has been generated. This new method will be applied to extract the dielectric constant and loss tangent of a ceramic substrate.

PREDICTION OF SHIELDING EFFECTIVENESS OF CEMENT-GRAPHITE POWDER USING ARTIFICIAL NEURAL NETWORK

2016 ◽  
Vol 78 (6-2) ◽  
Author(s):  
See Khee Yee ◽  
Samsul Haimi Dahlan ◽  
Mohd Zarar Mohd Jenu ◽  
Chee Kiong Sia
Keyword(s):  
Neural Network ◽  
Artificial Neural Network ◽  
Dielectric Constant ◽  
Loss Tangent ◽  
Analytical Calculation ◽  
Graphite Powder ◽  
Dielectric Measurement ◽  
Shielding Effectiveness ◽  
Dielectric Constant And Loss ◽  
Artificial Neural

This paper presents the method to predict the shielding effectiveness of cement powder mixed with different amount of graphite powder. Cement mixed with different percentage of graphite is prepared. Their dielectric constant and loss tangent are measured based on the transmission/reflection technique using APC7 connector. The measured data is fed into Artificial Neural Network (ANN) for training. When the training process is completed the neural network is used to predict the dielectric constant and loss tangent of cement-graphite mixture that contains different amount of graphite. The comparison shows that the trained neural network is very successful to predict the dielectric constant and loss tangent of cement-graphite mixture. The proposed graphical user interface has made the process of shielding effectiveness prediction becomes more user friendly especially for those designers who are not familiar with the analytical calculation of shielding effectiveness and dielectric measurement.

Synthesis and Characteristics of MgO Coated BST-Mg2TiO4 Composite Ceramics

2012 ◽  
Vol 512-515 ◽  
pp. 1180-1183
Author(s):  
Qian Qian Jia ◽  
Hui Ming Ji ◽  
Shan Liu ◽  
Xiao Lei Li ◽  
Zheng Guo Jin
Keyword(s):  
Dielectric Constant ◽  
Dielectric Properties ◽  
Curie Temperature ◽  
Loss Tangent ◽  
Phase Shifters ◽  
Precipitation Method ◽  
Composite Ceramics ◽  
Low Dielectric ◽  
Dielectric Constant And Loss ◽  
Bst Ceramics

The (Ba, Sr)TiO3 (hereafter BST) ceramics are promising candidate for applying in tunable devices. MgO coated BST-Mg2TiO4 (BSTM-MT) composite ceramics were prepared to obtain the low dielectric constant, low dielectric loss, good dielectric constant temperature stability, and high tunability of BST ceramics. The Ba0.55Sr0.40Ca0.05TiO3 nanoparticles were coated with MgO using the precipitation method and then mixed with Mg2TiO4 powders to fabricate BSTM-MT composite ceramics. The morphologies, phases, elements, and dielectric properties of the sintered ceramics were investigated. The core-shell structure of BST powder wrapped with MgO was clearly observed from the TEM image. After sintered at 1100 °C for 2 h, the composite ceramics expressed dense microstructures from SEM images and two main phases BST and Mg2TiO4 were detected in the XRD patterns. The dielectric constant and loss tangent were both reduced after the coating. The reduced dielectric constant and loss tangent of BSTM-MT were 190, 0.0011 (2MHz), respectively. The ceramics exhibited the diffuse phase transition near the Curie temperature and the Curie temperature shifted from 10 °C to 5 °C after the coating. Since the continuous Ti-O bonds were disconnected with the MgO coating, the tunability was reduced to 15.14 % under a DC bias field of 1.1 kV/mm. The optimistic dielectric properties made it useful for the application of tunable capacitors and phase shifters.

Dielectric Constant and Loss Tangent of Silicon at 700–900 GHz at Cryogenic Temperatures

2019 ◽  
Vol 29 (7) ◽  
pp. 501-503 ◽  
Author(s):  
Kangmin Zhou ◽  
Sylvain Caroopen ◽  
Yan Delorme ◽  
Michele Batrung ◽  
Maurice Gheudin ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Loss Tangent ◽  
Cryogenic Temperatures ◽  
Dielectric Constant And Loss
Sign in / Sign up

Export Citation Format

Share Document