Microwave filters on cavity resonators

2021 ◽  
Author(s):  
V.V. Komarov ◽  
S.K. Bushanskiy ◽  
A.O. Churkin
Keyword(s):  
High Power ◽  
Electromagnetic Waves ◽  
Complex Shape ◽  
Microwave Filters ◽  
Electronic Systems ◽  
Microwave Range ◽  
Cavity Resonators ◽  
Electromagnetic Characteristics ◽  
Technical Solutions

Waveguide and cavity microwave filters continue to be the most important components of high-power radio electronic systems. Cavity microwave filters are of great interest as a separate group of devices of this type. The fields of application of such filters are constantly expanding, and the variety of their design is quite large. In addition, the requirements for their electromagnetic characteristics and reliability are currently increasing. In this regard, it becomes necessary to analyze the already created designs of these devices and study the main trends of their improvement. The objective of the present study is to review the known technical solutions of bandpass filters, made on cavity resonators of the microwave range. An overview of the designs of devices for filtering electromagnetic waves on cavity resonators with coaxial and waveguide coupling elements of various frequency ranges is carried out. It is proposed to use the configuration of basic resonators as the main criterion for the classification of these devices. In accordance with this criterion, five groups of filters are considered: on rectangular, cylindrical, spherical, coaxial resonators, as well as on resonators of complex shape. The review makes it possible to analyze the features of the implementation of different technical solutions for bandpass microwave filters of medium and high power levels and to identify the main trends in the development of this area of research.

scholarly journals Investigation of Band-Pass Filters of K-Range on Rectangular Concentric Resonators

2020 ◽  
Vol 23 (1) ◽  
pp. 63-69
Author(s):  
V. V. Komarov ◽  
S. K. Bushanskiy
Keyword(s):  
Finite Element ◽  
Spectral Characteristics ◽  
Microwave Filters ◽  
Basic Unit ◽  
Microwave Range ◽  
Element Analysis ◽  
Cavity Resonators ◽  
Microwave Engineering ◽  
New Type ◽  
Electromagnetic Signals

Introduction. Simple-shaped cavity resonators: rectangular, cylindrical and coaxial, are widely applied in modern microwave engineering in design of different functional devices of middle and high power levels. Parameters of resonators can be obtained analytically by using expressions from literature. Concentric resonators, performed on the basis of classical simple-shaped cavities with a central metallic core represent a new class of electrodynamic systems of microwave range, the properties of which remain poorly studied. One of these structures, named a rectangular concentric resonator (RCR) is proposed in the paper as a basic unit of K-band bandpass filters (18...26 GHz).Aim. To study potential possibilities of RCR for creation electromagnetic signals filtration devices of micro wave range.Materials and methods. The finite element method implemented in the package COMSOL was used to investigate electrodynamic characteristics of RCR and scattering matrix parameters of the microwave filters on RCR basis.Results. Simple polynomial expressions for computation of normalized resonant wavelengths of RCR were obtained at the first stage of modeling. Next, two models of passband microwave filters by RCR with different sizes were built and their EM characteristics were studied. Cavities sizes were determined numerically and practical recommendations on the realization of a new type bandpass microwave filters were formulated.Conclusion. New results of the finite-element analysis of spectral characteristics of two models of bandpass Krange filters on rectangular concentric resonators were represented. The advantages of the filters were indicated. Simple analytical expressions for calculation of the resonance wavelengths of the considered concentric resonators were obtained.

scholarly journals Исследование поглощения СВЧ излучения в сверхтонких проводящих пленках

2020 ◽  
Vol 90 (8) ◽  
pp. 1348
Author(s):  
В.В. Старостенко ◽  
В.Б. Орленсон ◽  
А.С. Мазинов ◽  
И.Ш. Фитаев
Keyword(s):  
Numerical Simulation ◽  
Electromagnetic Waves ◽  
Microwave Range ◽  
Wave Analysis ◽  
Conductive Films ◽  
Change Dynamics ◽  
Rigorous Coupled Wave Analysis ◽  
Electromagnetic Characteristics ◽  
Rigorous Coupled Wave ◽  
Nanometer Thickness

An interaction numerical simulation of the microwave range electromagnetic waves with nanometer thickness conductive films, which are approximated by homogeneous region and micro- or nanoparticle’s structures, is carried out. Using the rigorous coupled wave analysis, the optical coefficients change dynamics is studied from values characterize dielectric to values for uniform conductive films, and the influence of conductive islands size and distribution on the electromagnetic characteristics is analyzed.

scholarly journals ANALYSIS OF PROSPECTIVE DIRECTIONS FOR DEVELOPMENT OF SYSTEMS USING REFLECTION OR SECONDARY RADIATION OF ACOUSTIC WAVES

2020 ◽  
pp. 6-13
Author(s):  
V. I. Avdzeyko ◽  
V. I. Karnyshev ◽  
E. S. Paskal
Keyword(s):  
Acoustic Waves ◽  
Study Data ◽  
Secondary Radiation ◽  
Electronic Systems ◽  
Technical Solution ◽  
Patent Classification ◽  
International Patent ◽  
Predictive Assessments ◽  
Technical Solutions

In this work, to identify promising areas for the development of electronic systems using reflection or secondary radiation of acoustic waves, a patent analysis method is used based on the formation of time series of US patents and comparison between different technical solutions for the number of patents registered in specific subgroups of the International Patent Classification (IPC), and the dynamics of their issuance in the interval 2010–2019. The use of the IPC allows an effective search and classification of any technical solution, a retrospective analysis, as well as the formation of predictive assessments of the development of technologies, involving open resources of various patent offices. As a result of the study, data were obtained that suggest that all systems using the reflection of acoustic waves have been successfully developing for the past ten years. The most promising among them are systems using reflection of acoustic waves and systems specially designed for special applications. Among systems with reflection of acoustic waves, the most promising systems are systems for determining the location of a target by measuring only range using transmissions of intermittent pulse-modulated signals.

scholarly journals Reforestation by Seedlings and Saplings: Challenges and Solutions

2020 ◽  
Vol 8 (4) ◽  
pp. 1408-1415
Keyword(s):  
Knowledge Base ◽  
Information Search ◽  
Forest Regeneration ◽  
Foreign Markets ◽  
High Quality ◽  
Intensive Forest Management ◽  
Business Entities ◽  
Technical Solutions ◽  
Technological Analysis

Despite the urgent need to accelerate the development of intensive forest management and reforestation technologies in Russia, the problem of creating progressive technologies and techniques to increase the efficiency of reforestation by seedlings and saplings of forest crops has not been completely resolved, which are serious challenges for accelerated and high-quality reforestation. Of particular concern is the lack of patented equipment competitive in the domestic and foreign markets for reforestation by seedlings and saplings of forest crops that can accelerate the creation of highly productive forests. To answer these challenges, it is proposed as a tool for the synthesis of patentable solutions that increase the efficiency of forest regeneration by seedlings and saplings of forest crops, to use the knowledge base formed on the basis of patent information search and the author’s methodology of functional, structural and technological analysis. A classification of the main areas of patenting in this area is proposed. The most characteristic patented objects of technologies and equipment that can be used as analogues and prototypes for the synthesis and patenting of new intellectual property for planting seedlings/saplings, as well as business entities patenting in this area, are identified. The effects (goals) for the achievement of which the technical solutions incorporated in the patents are directed are revealed. Using the generated knowledge base and the FSTA methodology, a synthesis of new patentable technical solutions has been carried out. Its features and some results are given on the example of several basic objects of machines and manual devices for planting seedlings/saplings. It is proved that the application of the proposed methodology to the selected object for improving the processes of planting seedlings/saplings is effective, which is confirmed by the development and patenting of fundamentally new technical solutions for equipping forest regeneration with seedlings and saplings of forest crops.

scholarly journals Information security - its essence and threats

2018 ◽  
Vol 188 (2) ◽  
Author(s):  
Estera Pietras
Keyword(s):  
Information Security ◽  
Information Flow ◽  
Data Protection ◽  
Security Systems ◽  
Exchange Of Information ◽  
Starting Point ◽  
Effective System ◽  
Business Entities ◽  
Technical Solutions

Due to the exchange of information, organizations are encouraged to create an effective system of information flow that should be monitored on a regular basis in order to minimize the risk of emergence of threats. Due to modern technical solutions of security systems, it is much more possible and accessible than a few years ago. For this purpose, proper identification and classification of threats is necessary. This constitutes the starting point for considering the role and the essence of risk. The article highlights the aspects related to ensuring information security as a whole and data protection- the most important assets of business entities.

scholarly journals A HIGH-POWER SOURCE OF OPTICAL RADIATION WITH MICROWAVE EXCITATION

2019 ◽  
Author(s):  
Gennadiy Ivanovich Churyumov ◽  
Oleksandr Grigorovich Denisov ◽  
Tetyana Ivanivna Frolova ◽  
Nannan Wang ◽  
Jinghui Qiu
Keyword(s):  
Energy Efficiency ◽  
High Power ◽  
Optical Radiation ◽  
Microwave Energy ◽  
Light Energy ◽  
Theory And Practice ◽  
Microwave Range ◽  
Energy Transformation ◽  
Transformation Methods ◽  
Microwave Excitation

For more than 50 years, interest to the microwave heating technology has not weakened. In addition to the traditional areas of its application, which described in detail in [1], recently there has been an expansion of technological possibilities for the use of microwave energy associated with the impact of electromagnetic waves of the microwave range on various materials (sintering of metal and ceramic powders) and media, including plasma [2]. One such new direction is the creation of high-power and environmentally friendly sources of optical radiation on the basis of an electrodeless sulfur lamp with microwave excitation [2, 3]. The purpose of this paper is to the further development of the theory and practice of microwave excitation by the electrodeless sulfur lamps, improvement the energy efficiency during energy conversion into the optical radiation and widening the application of new light sources in real practice. The results of the computer modeling of conversion process of the microwave energy into optical radiation energy are presented. The simulation results are compared with experimental data. It is shown that additional use of the solar panels for the reverse conversion of the optical radiation into DC energy with follow-up its using in the circuits of secondary power supply allows improving the energy efficiency of the light source.   References Microwave Power Engineering. Edited by E.C. Okress. V. 1, 2. Academic Press, New York & London. 1968.A.N. Didenko, SVCh-energetika. Teoriya i praktika. – Moscow: Nauka. 2003.- 445 s.G. Churyumov, T. Frolova, “Microwave Energy and Light Energy Transformation: Methods, Schemes and Designs. Microwave Energy and Light Energy Transformation: Methods, Schemes and Designs” // In book “Emerging Microwave Technologies in Industrial, Agricultural, Medical and Food Processing.” Edited by Kok Yeow You, IntechOpen, 2018. pp. 75-91.

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