Low-cost glow discharge tube microwave frequency sensor

1976 ◽  
Vol 64 (3) ◽  
pp. 382-384 ◽  
Author(s):  
N.S. Kopeika ◽  
D. Even-Zur ◽  
I. Fishbein
Keyword(s):  
Glow Discharge ◽  
Discharge Tube ◽  
Low Cost ◽  
Microwave Frequency ◽  
Frequency Sensor

scholarly journals Synthesis and characterization of Mg–Zn ferrite based flexible microwave composites and its application as SNG metamaterial

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Md Atiqur Rahman ◽  
Mohammad Tariqul Islam ◽  
Mandeep Singh Jit Singh ◽  
Md Samsuzzaman ◽  
Muhammad E. H. Chowdhury
Keyword(s):  
Low Cost ◽  
Sol Gel ◽  
Microwave Frequency ◽  
Dielectric Substrate ◽  
Dielectric Constants ◽  
Potential Candidate ◽  
Flexible Composites ◽  
Average Grain Size ◽  
Zn Ferrite ◽  
High Flexibility

AbstractIn this article, we propose SNG (single negative) metamaterial fabricated on Mg–Zn ferrite-based flexible microwave composites. Firstly, the flexible composites are synthesized by the sol-gel method having four different molecular compositions of MgxZn(1−x)Fe2O4, which are denoted as Mg20, Mg40, Mg60, and Mg80. The structural, morphological, and microwave properties of the synthesized flexible composites are analyzed using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), and conventional dielectric assessment kit (DAK) to justify their possible application as dielectric substrate at microwave frequency regime. Thus the average grain size is found from 20 to 24 nm, and the dielectric constants are 6.01, 5.10, 4.19, and 3.28, as well as loss tangents, are 0.002, 0.004, 0.006, and 0.008 for the prepared Mg–Zn ferrites, i.e., Mg20, Mg40, Mg60, and Mg80 respectively. Besides, the prepared low-cost Mg–Zn ferrite composites exhibit high flexibility and lightweight, which makes them a potential candidate as a metamaterial substrate. Furthermore, a single negative (SNG) metamaterial unit cell is fabricated on the prepared, flexible microwave composites, and their essential electromagnetic behaviors are observed. Very good effective medium ratios (EMR) vales are obtained from 14.65 to 18.47, which ensure the compactness of the fabricated prototypes with a physical dimension of 8 × 6.5 mm2. Also, the proposed materials have shown better performances comparing with conventional FR4 and RO4533 materials, and they have covered S-, C-, X-, Ku-, and K-band of microwave frequency region. Thus, the prepared, flexible SNG metamaterials on MgxZn(1−x)Fe2O4 composites are suitable for microwave and flexible technologies.

Dielectric Characterisation of Plastics for Microwave Oven Applications

2005 ◽  
Vol 480-481 ◽  
pp. 161-164 ◽  
Author(s):  
Luís Cadillon Costa ◽  
A. Correia ◽  
A. Viegas ◽  
João Bessa Sousa ◽  
François Henry
Keyword(s):  
Low Cost ◽  
Chemical Properties ◽  
Microwave Frequency ◽  
Microwave Oven ◽  
Complex Dielectric Constant ◽  
First Order ◽  
Constant E ◽  
Materials Used ◽  
Resonant Method ◽  
And Chemical Properties

The materials used in microwave oven cavities must have specific dielectric properties in order to maintain the efficiency of the food heating. Plastics, by their mechanical and chemical properties and low cost, are one of those potential materials. In this study, we present the results of the measurements of complex dielectric constant, ´´ ´ * e e e í − = , in the microwave frequency region, on different plastics: polyoxymethylene (POM), polypropylene (PP) and polybutylene terephtalate (PBT), using the cavity resonant method. We measure the shift in the resonant frequency of the cavity, Df, caused by the insertion of the sample, which can be related to the real part of the complex permitivitty, e´, while the change in the inverse of the quality factor of the cavity, D(1/Q), gives the imaginary part, e´´. The relations are simple when we consider only the first order perturbation in the electric field caused by the sample.

scholarly journals Reference Breast Phantoms for Low-Cost Microwave Imaging

2020 ◽  
Vol 14 (4) ◽  
pp. 411-415
Author(s):  
Emine Avşar Aydin ◽  
Selin Yabaci Karaoğlan
Keyword(s):  
Breast Cancer ◽  
Low Cost ◽  
Microwave Frequency ◽  
Biological Tissues ◽  
Microwave Imaging ◽  
Vector Network Analyzers ◽  
Network Analyzers ◽  
Computer Based ◽  
Breast Phantoms ◽  
Inverse Radon Transform

Microwave imaging provides an alternative method for breast cancer screening and the diagnosis of cerebrovascular accidents. Before a surgical operation, the performance of microwave imaging systems should be evaluated on anatomically detailed anthropomorphic phantoms. This paper puts forward the advances in the development of breast phantoms based on 3D printing structures filled with liquid solutions that mimic biological tissues in terms of complex permittivity in a wide microwave frequency band. In this paper; four different experimental scenarios were created, and measurements were performed, and although there are many vector network analyzers on the market, the miniVNA used in this study has been shown to have potential in many biomedical applications such as portable computer-based breast cancer detection studies. We especially investigated the reproducibility of a particular mixture and the ability of some mixes to mimic various breast tissues. Afterwards, the images similar to the experimentally created scenarios were obtained by implementing the inverse radon transform to the obtained data.

scholarly journals Low-Cost Additive Manufacturing Techniques Applied to the Design of Planar Microwave Circuits by Fused Deposition Modeling

Polymers ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 1946 ◽  
Author(s):  
Héctor García-Martínez ◽  
Ernesto Ávila-Navarro ◽  
Germán Torregrosa-Penalva ◽  
Alberto Rodríguez-Martínez ◽  
Carolina Blanco-Angulo ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Manufacturing Process ◽  
Fused Deposition Modeling ◽  
Low Cost ◽  
Microwave Frequency ◽  
Microwave Circuits ◽  
Fused Deposition ◽  
Microwave Electronic ◽  
Deposition Modeling ◽  
Manufacturing Techniques

This work presents a study on the implementation and manufacturing of low-cost microwave electronic circuits, made with additive manufacturing techniques using fused deposition modeling (FDM) technology. First, the manufacturing process of substrates with different filaments, using various options offered by additive techniques in the manufacture of 3D printing parts, is described. The implemented substrates are structurally analyzed by ultrasound techniques to verify the correct metallization and fabrication of the substrate, and the characterization of the electrical properties in the microwave frequency range of each filament is performed. Finally, standard and novel microwave filters in microstrip and stripline technology are implemented, making use of the possibilities offered by additive techniques in the manufacturing process. The designed devices were manufactured and measured with good results, which demonstrates the possibility of using low-cost 3D printers in the design process of planar microwave circuits.

Subnormal glow discharge in a Xe/Cl2 mixture in a narrow discharge tube

2001 ◽  
Vol 46 (8) ◽  
pp. 1049-1052
Author(s):  
A. K. Shuaibov ◽  
A. I. Dashchenko ◽  
I. V. Shevera
Keyword(s):  
Glow Discharge ◽  
Discharge Tube

Glow Discharge Tube Glass Electrodes

1979 ◽  
Vol 126 (12) ◽  
pp. 2196-2205 ◽  
Author(s):  
William Primak ◽  
Emmet Monahan
Keyword(s):  
Glow Discharge ◽  
Discharge Tube ◽  
Glass Electrodes

The discharge tube material influence on N2–O2 DC glow discharge

Vacuum ◽  
2002 ◽  
Vol 67 (3-4) ◽  
pp. 415-420 ◽  
Author(s):  
A Kaňka ◽  
O Kylián ◽  
V Hrachová
Keyword(s):  
Glow Discharge ◽  
Discharge Tube ◽  
Dc Glow Discharge ◽  
Tube Material

A low-voltage glow discharge tube

1964 ◽  
Vol 28 (5) ◽  
pp. 313
Author(s):  
R.F. Hall ◽  
B.J. Stocker
Keyword(s):  
Glow Discharge ◽  
Discharge Tube ◽  
Low Voltage
Sign in / Sign up

Export Citation Format

Share Document