A WAVE-GUIDE METHOD OF MEASUREMENT OF THE DIELECTRIC CONSTANT OF LOW-LOSS LIQUIDS

1963 ◽  
Vol 41 (8) ◽  
pp. 1314-1320 ◽  
Author(s):  
I. R. Dagg ◽  
G. E. Reesor
Keyword(s):  
Dielectric Constant ◽  
Carbon Tetrachloride ◽  
Imaginary Part ◽  
Wave Guide ◽  
Impedance Change ◽  
Frequency Range ◽  
Low Loss ◽  
Dielectric Interface ◽  
The Real ◽  
Method Of Measurement

A method of measurement of the real and imaginary parts of the dielectric constant of low-loss liquids is described. The real part of the dielectric constant is derived from the impedance change at an air–dielectric interface in a wave guide; the imaginary part is derived from attenuation measurements made on a liquid-filled guide. The results of initial measurements on carbon tetrachloride and heptane in the frequency range 8.2 to 12.4 Gc/s are given.

scholarly journals STRUCTURAL AND DIELECTRIC PROPERTIES OF GLASSES IN THE SYSTEM TeO2–CaCu3Ti4O12

2012 ◽  
Vol 02 (04) ◽  
pp. 1250020 ◽  
Author(s):  
P. THOMAS ◽  
K. B. R. VARMA
Keyword(s):  
Dielectric Constant ◽  
Electric Modulus ◽  
Differential Scanning Calorimetric ◽  
Frequency Range ◽  
Low Loss ◽  
Modulus Formalism ◽  
X Ray ◽  
Dielectric Constant And Loss ◽  
Frequency Independent ◽  
Electric Modulus Formalism

The glasses in the system (100 - x) TeO2 –x CaCu3Ti4O12 , (x = 0.25 mol. % to 3 mol.%) were fabricated. The color varied from olive green to brown as the CaCu3Ti4O12 (CCTO) content increased in TeO2 matrix. The X-ray powder diffraction and differential scanning calorimetric analyses that were carried out on the as-quenched samples confirmed their amorphous and glassy nature respectively. The dielectric constant and loss in the 100 Hz–1 MHz frequency range were monitored as a function of temperature (50–400°C). The dielectric constant [Formula: see text] and the loss (D) increased as the CCTO content increased in TeO2 at all the frequencies and temperatures under investigation. Further, the [Formula: see text] and D were found to be frequency-independent in the 50–200°C temperature range. The value obtained for the loss at 1 MHz was 0.0019 which was typical of low loss materials, and exhibited near constant loss (NCL) in the 100 Hz–1 MHz frequency range. The electrical relaxation was rationalized using the electric modulus formalism. These glasses may be of considerable interest as substrates for high frequency circuit elements in conventional semiconductor industries owing to their high thermal stability.

Achieving Ceramic-like RF Capacitor Requirements with Organic-based Materials

2010 ◽  
Vol 2010 (1) ◽  
pp. 000072-000075 ◽  
Author(s):  
Jin-Hyun Hwang ◽  
John Andresakis ◽  
Bob Carter ◽  
Yuji Kageyama ◽  
Fujio Kuwako
Keyword(s):  
Dielectric Constant ◽  
Form Factor ◽  
High Dielectric Constant ◽  
High Volume ◽  
Electrical Performance ◽  
Frequency Range ◽  
Large Area ◽  
Low Loss ◽  
Capacitance Variation ◽  
High Dielectric

New and novel organic-based composite materials for the use of embedded RF capacitors have been developed to address the important material issues by means of functional filler and resin chemistry. Combining different fillers with appropriate chemistries, the net composite can be made thermally stable while retaining the high dielectric constant and low loss. These composites attained dielectric constant of above 7 without compromising the quality factor in GHz frequency range. In addition, measurement of capacitance variation as a function of temperature (TCC) showed flatter TCC profile, resulting in TCC of ±30 ppm/°C over the temperature range −55°C to 125°C. It can be incorporated into organic chip package and, unlike ceramic-based LTCC they can utilize large area processing that is typical, and available in high volume manufacturing. This material is formulated for RF module designers to successfully implement embedded RF capacitors into their organic chip package designs and thus improve form factor, electrical performance and possibly reduce overall costs.

Low Loss LTCC Ag System for 5G Applications

2021 ◽  
Vol 2021 (HiTEC) ◽  
pp. 000105-000111
Author(s):  
Ellen Tormey ◽  
Chao Ma ◽  
John Maloney ◽  
Bradford Smith ◽  
Sid Sridharan ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
High Frequency ◽  
Lower Cost ◽  
Low Dielectric Constant ◽  
Low Latency ◽  
Frequency Range ◽  
Low Loss ◽  
Green Tape ◽  
Low Dielectric ◽  
Wireless Telecommunications

Abstract Low dielectric constant/low loss LTCC materials have drawn much attention with the emergence of 5G wireless telecommunications. LTCC offers unique properties in the millimeter wave frequency range. The low dielectric constant and dielectric loss enable low latency devices with enhanced performance. To meet the market demands of higher performance and lower cost, Ferro has developed a new M7 LTCC/Ag cofireable system suitable for antenna in 5G and other high frequency applications. M7 LTCC ceramic green tape and cofireable Ag conductors have been developed and tested. Properties of the LTCC/Ag system are included herein including high frequency dielectric properties.

AN INVESTIGATION ON THE DIELECTRIC PROPERTIES OF POLYANILINE-BASED NANOCOMPOSITE

2010 ◽  
Vol 24 (15) ◽  
pp. 1669-1674
Author(s):  
J. JIANG ◽  
L. H. AI
Keyword(s):  
Dielectric Properties ◽  
Imaginary Part ◽  
Complex Permittivity ◽  
Room Temperature ◽  
In Situ Polymerization ◽  
Dissipation Factor ◽  
Frequency Range ◽  
The Real ◽  
Tan Δ

Polyaniline/ LiNi 0.5 Gd 0.08 Fe 1.92 O 4 nanocomposite was synthesized by an in-situ polymerization of aniline in the presence of LiNi 0.5 Gd 0.08 Fe 1.92 O 4 particles. The dielectric properties of the as-prepared polyaniline-based nanocomposite were investigated using an Agilent E4991A RF Impedance/Material Analyzer at room temperature in the frequency range from 1 MHz to 1 GHz. The real (ε') and imaginary part (ε″) of complex permittivity, and dissipation factor ( tan δ) were found to be frequency-dependent, which decreased with increasing of frequency. It was shown that ε', ε″ and tan δ of the nanocomposite were lower than those of pristine polyaniline. In order to investigate the dielectric process in detail, the complex electric modulii derived from the complex permittivity were analyzed as a function of the frequency.

scholarly journals Infrared Absorption and Reflection Spectra of Crystalline TCNQ Salts

1989 ◽  
Vol 42 (2) ◽  
pp. 203 ◽  
Author(s):  
Ajay T Oza
Keyword(s):  
Dielectric Constant ◽  
Imaginary Part ◽  
Infrared Absorption ◽  
Reflectance Spectra ◽  
Reflection Spectra ◽  
Reflectance Curve ◽  
The Real ◽  
Broad Maximum ◽  
Absorption Features ◽  
Reflection Characteristics

The polarised absorption and reflectance spectra of the three TCNQ salts pyridinium (TCNQh, triethylammonium (TCNQh and thermally damaged quinolinium (TCNQh indicate that the absorption features are governed by reflection characteristics. The maximum reflectance curve shows a broad minimum which corresponds to a negative dip in the real part of the dielectric constant and a broad maximum in the imaginary part, as calculated using a Kramers-Kronig

Strip dielectric wave guide antenna-for the measurement of dielectric constant of low-loss materials

1993 ◽  
Vol 14 (7) ◽  
pp. 1471-1483
Author(s):  
Alok Kumar Rastogi ◽  
A. K. Tiwari ◽  
R. P. Shrivastava
Keyword(s):  
Dielectric Constant ◽  
Wave Guide ◽  
Low Loss

Dielectric Loss Measurements on Nonpolar Liquids in the Microwave Region from 18 to 37 GHz

1972 ◽  
Vol 50 (20) ◽  
pp. 2397-2401 ◽  
Author(s):  
I. R. Dagg ◽  
G. E. Reesor
Keyword(s):  
Dielectric Constant ◽  
Carbon Tetrachloride ◽  
Dielectric Loss ◽  
Carbon Disulfide ◽  
Loss Tangent ◽  
Microwave Frequency ◽  
Frequency Region ◽  
Low Loss ◽  
Microwave Region ◽  
Nonpolar Liquids

The results of dielectric-constant measurements on a number of low-loss liquids in the microwave frequency region from 18 to 40 GHz are presented. Emphasis is placed on the value of the loss tangent. Liquids measured include carbon tetrachloride, carbon disulfide, cyclohexane, n-hexane, n-heptane, n-nonane, and n-decane. A wave guide method was used giving an accuracy for the loss tangent of ±0.3 × 10−4. Where possible, results have been fitted to a Debye expression. Comparisons have been made with available results of other workers.

Dielectric Loss Measurements on Nonpolar Liquids in the Microwave Region 8 to 12 GHz

1974 ◽  
Vol 52 (1) ◽  
pp. 29-32 ◽  
Author(s):  
I. R. Dagg ◽  
G. E. Reesor
Keyword(s):  
Dielectric Constant ◽  
Carbon Tetrachloride ◽  
Dielectric Loss ◽  
Loss Tangent ◽  
Microwave Frequency ◽  
Frequency Region ◽  
Low Loss ◽  
Microwave Region ◽  
Nonpolar Liquids ◽  
Improved Accuracy

The results of dielectric-constant measurements on a number of low-loss liquids in the microwave frequency region from 8 to 12 GHz are reported. An improved wave-guide technique is described which gives precise values of the real part of the dielectric constant and improved accuracy in determining the dielectric loss. Liquids measured include the alkane series : n-pentane, n-hexane, n-heptane, n-nonane, n-decane, and n-dodecane. Results for cyclohexane and carbon tetrachloride are also given for comparison with those results of other workers. The data for the loss tangent for the alkane series of liquids are compared with previous results in the 18 to 37 GHz region.

scholarly journals Determination of the complex dielectric permeability of liquid at the radiation frequency 32 GHz

2021 ◽  
Vol 1198 (1) ◽  
pp. 012012
Author(s):  
B G Tsydypov ◽  
A V Bazarov ◽  
B V Basanov ◽  
B Z Garmaev ◽  
E Yu Korovin ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Reflection Coefficient ◽  
Imaginary Part ◽  
Dielectric Permeability ◽  
Complex Dielectric Constant ◽  
Radiation Frequency ◽  
Layer Depth ◽  
The Real

Abstract Method and device for measuring the complex dielectric constant of liquids are described. The real part of the complex dielectric constant calculated from the conditions for the maximum and minimum of the measured interference dependence of the reflection coefficient on the layer depth. The imaginary part determined by selection to the maximum coincidence of the calculated and measured dependences of the reflection coefficient.

Effect of M2+ Substitution on Properties of the System Nix Zn1-x-y My Fe2O4

2016 ◽  
Vol 63 ◽  
pp. 42-48
Author(s):  
Nahedh H. Alwash ◽  
Hadey K. Mohamad ◽  
M.H. Almaamori
Keyword(s):  
Dielectric Constant ◽  
Magnetic Properties ◽  
Imaginary Part ◽  
Apparent Density ◽  
Initial Permeability ◽  
Electrical Characteristics ◽  
Frequency Range ◽  
Tan Δ ◽  
Co Precipitation ◽  
Final Synthesis

The four types of ferrites have been prepared by co-precipitation technique(Ni Zn Fe2O4,MgFe2O4,MnFe2O4,Cd Fe2O4). The prepared ferrites were sintered at 800C ̊. Then using the these types of ferrite to prepared the final Synthesis NixZn1-x-yMyFe2O4wereM2+=(Mg,Mn,Cd)with (X=0.3),(Y=0.4) to be six samples halve of these as pressed pellets (12.3 mm diameter, 5-4mm thickness) and later halve as triodes (Rin=9.85mm,Rout=19.4mm). All of them were sintered at (1100 °C) for (2 hr). (XRD) Technique was used to study the structure of matrix NixZn1-x-yMyFe2O4, the apparent density , and porosity were calculated, The electrical characteristics for these samples included the measure of A.C current as the dielectric constant was calculated (έ ) ,loses factor (tan δ) was measured at the same frequency range (20Hz - 3MHz) to calculate the imaginary part of dielectric constant and also the magnetic properties was measured by the same equipment, (initial permeabilityμ ) was calculate after measuring the inductors (L), the VSM Technique was used to study hysterics lope behavior of these samples.

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