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Wyszukujesz frazę "high power microwave" wg kryterium: Wszystkie pola


Wyświetlanie 1-13 z 13
Tytuł:
High power microwave for knocking out programmable suicide drones
Autorzy:
Chaari, Mohamed Zied
Powiązania:
https://bibliotekanauki.pl/articles/1311126.pdf
Data publikacji:
2021
Wydawca:
Akademia Sztuki Wojennej
Tematy:
high power microwave
conical horn antenna
errant drone
kill drone
high frequency
Opis:
The primary research objective is to reduce the dangers of rogue drones in our lives and the consequences of extremist groups, drug dealers, and organised criminals using them. The growing number of incidents involving modified drones proves the weakness of existing technology in stopping and neutralising errant drones such as the hand-held gun jammer, trained eagle, R.F. jammer, and others. This technology is not very likely to able to knock out a rogue drone and is incapable of stopping programmable drones. This article aims to examine the directed energy of HPM (high power microwaves) in using the electromagnetic field strength energy to damage the drone’s structure or burn its PCB board electronics. It goes on to analyse electronic attack using microwave power with high frequency to immediately switch off drones. The effectiveness of high microwave power for disrupting drones at different distances and in different weather conditions is evaluated. A study of the conical horn antenna of the magnetron coupling system, which has an operating frequency of 2.45 GHz, is also included.
Źródło:
Security and Defence Quarterly; 2021, 34, 2; 68-84
2300-8741
2544-994X
Pojawia się w:
Security and Defence Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Computer-controlled System of High-power Microwave Sources
Autorzy:
Korpas, P.
Gryglewski, D.
Wojtasiak, W.
Gwarek, W.
Powiązania:
https://bibliotekanauki.pl/articles/226529.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
SiC
GaN
high power amplifier
PLL synthesizer
microwave sources
Opis:
The paper presents the design and hardware implementation of a computer controlled system composed of up to four high-power microwave sources. Each source provides up to 200 W of continuous wave power. Frequency of each source is stabilized within ±0.5 ppm of the nominal frequency adjustable within 2.35÷2.6 GHz range. All four sources can be synchronized to the same frequency with computer-controlled phase shift between the signals generated by each of them. The paper concentrates on the choice of components for such a system and the properties of the realized hardware implementation.
Źródło:
International Journal of Electronics and Telecommunications; 2011, 57, 1; 121-126
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis and optimization of outputs of high power microwave tubes
Autorzy:
Węgrzyniak, P.
Gwarek, W.
Baczewski, D.
Powiązania:
https://bibliotekanauki.pl/articles/307618.pdf
Data publikacji:
2007
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
high power microwave tubes
optimization of outputs
Opis:
The subject of this work is optimization of outputs of L-band high power microwave tubes. These outputs are constructed as coaxial-to-waveguide transitions with a vacuum barrier in a form of glass or ceramic cup. The goal of optimization is to obtain sufficiently low reflection loss in the predefined frequency band and to avoid so called hot spots caused by excessive dissipation of microwave power in parts of the cup. Electromagnetic simulator has been applied to model the behavior of the optimized transition and to propose its optimum shape. The proposed solutions were verified by Z.E. Lamina SA in prototypes of high power (pulsed 600 kW) amplitrons and are to be used in manufacturing practice.
Źródło:
Journal of Telecommunications and Information Technology; 2007, 1; 35-39
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A six-port measurement device for high power microwave vector network analysis
Autorzy:
Kommey, Benjamin
Addo, Ernest Ofosu
Tamakloe, Elvis
Tchao, Eric Tutu
Nunoo-Mensah, Henry
Akowuah, Bright Yeboah
Powiązania:
https://bibliotekanauki.pl/articles/38436703.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Promocji Wiedzy
Tematy:
vector network analyzer
microwave device
S-Band network
reflection coefficient
waveguide
Opis:
The changes experienced in technology due to the third industrial revolution have over the years contributed immensely to the development of efficient devices and systems. As a result, solutions have been provided to challenges encountered in the heating industry. However, higher efficiency and better performance has undoubtedly been highly sort after. This paper presents the complete industrial development of a new system of a microwave device for use in S-band networks (2.45 GHz ISM band in this application): a vector network analyzer (VNA). The VNA, which is designed based on the six-port measurement principle, provides accurate measurements of both magnitude and phase of the load reflection coefficient. The device is designed to have high power handling capabilities and works under the full operating conditions of high-power microwave generators. Initial measurements show that the device perform stable and can perform temperature-independent measurements over protracted periods. The system is suited for on-line monitoring and control of network parameters in industrial waveguide applications.
Źródło:
Applied Computer Science; 2022, 18, 3; 105-129
1895-3735
2353-6977
Pojawia się w:
Applied Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Resistive Sensor for Short High-Power Microwave Pulse Measurement in Millimeter Wave Range
Autorzy:
Tamošiūnas, V.
Kancleris, Ž
Dagys, M.
Simniškis, R.
Agee, F.
Powiązania:
https://bibliotekanauki.pl/articles/1177568.pdf
Data publikacji:
2005-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
72.20.Ht
72.30.+q
85.30.De
Opis:
We report on the numerical investigation of the resistive sensor for the 78-118 GHz range. A three-dimensional finite-difference time-domain method was applied to simulate the wave propagation within a waveguide segment with the semiconductor sensor attached to a wider wall of the wave-guide. The electric field distribution, voltage standing-wave ratio and the average electric field dependences on frequency have been determined for several sets of dimensions and specific resistances of the sample. It is demonstrated that a proper selection of the dimensions and specific resistance of the sample can compensate the waveguide dispersion and the decrease of the electron heating effect with frequency. Therefore, a nearly constant sensitivity of the sensor can be obtained for the entire frequency range.
Źródło:
Acta Physica Polonica A; 2005, 107, 2; 420-424
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of an Ultra-Compact, Repetitive Marx Generator for High-Power Microwave Applications
Autorzy:
Bischoff, R.
Charon, R.
Duperoux, J.
Martin, B.
Pinguet, S.
Powiązania:
https://bibliotekanauki.pl/articles/1807853.pdf
Data publikacji:
2009-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
84.30.Ng
84.32.Hh
84.32.Tt
84.60.Ve
Opis:
The need for repetitive high-power microwave systems, for instance within the scope of convoy protection, requires the availability of compact, repetitive pulsed-power generators. The development and the first experimental results of an upgraded balanced ISL Marx generator for future repetitive operations at pulse repetition frequencies in the order of 100 Hz are introduced. A key objective is to keep the fundamental modular coaxial concept by reason of its scalability and compactness. Simulation models were developed under the PSpice software package in order to investigate the charging and discharging phases of the Marx generator and also to determine the design criteria for repetitive operations. The charging resistors were replaced by ultracompact inductors for rapid charging, being able to withstand pulsed voltages up to 60 kV and pulsed currents up to 1.4 kA during the discharge phase. An improved type of strontium-titanate high-voltage ceramic capacitor was successfully tested experimentally up to 70 kV. Each new elementary stage of the Marx generator consists of eight 1.1 nF sectors of a cylinder capacitors mounted in parallel, two charging inductors of about 17.8 μH and two halves of spherical spark gaps. The pressurized self-triggered gas switches are arranged along the axis for fast consecutive breakdown thanks to the UV radiation emitted during the breakdown in each gap. The stages are installed in individual fibreglass housings. First experimental results of a 4-stage Marx generator in repetitive operation, driven by a 4 kW capacitor charging power supply up to a maximum voltage of 40 kV, are presented.
Źródło:
Acta Physica Polonica A; 2009, 115, 6; 964-966
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
High Power Microwave Detection in Asymmetrically Shaped n-Al$\text{}_{x}$Ga$\text{}_{1-x}$As Structures
Autorzy:
Ašmontas, S.
Čerškus, A.
Gradauskas, J.
Kundrotas, J.
Lučun, A.
Petkun, V.
Sužiedėlis, A.
Šilėnas, A.
Powiązania:
https://bibliotekanauki.pl/articles/2041762.pdf
Data publikacji:
2005-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
07.57.Kp
84.40.-x
72.20.Ht
Opis:
Investigations of detection of high power microwaves in planar asymmetrically shaped microwave diodes on the basis of Al$\text{}_{x}$Ga$\text{}_{1-x}$As ternary semiconductors with various AlAs mole fraction are presented. The principle of operation of the microwave diodes is based on carrier heating phenomena in asymmetrically shaped homogeneous semiconductor structure due to different distribution of the electric field strength along the sample. Experimental results of microwave detection on the barrier-less asymmetrically shaped diodes are presented paying special attention to the homogeneity of Al$\text{}_{x}$Ga$\text{}_{1-x}$As which was monitored by photoluminescence technique.
Źródło:
Acta Physica Polonica A; 2005, 107, 2; 315-318
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental Investigation of High Pulse Power Microwave Resistive Sensor with Flat Frequency Response
Autorzy:
Kancleris, Ž.
Simniškis, R.
Dagys, M.
Tamošiūnas, V.
Ragulis, P.
Powiązania:
https://bibliotekanauki.pl/articles/1807940.pdf
Data publikacji:
2009-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
07.57.Kp
72.20.Ht
85.30.De
Opis:
Two types of resistive sensors with flat frequency response for microwave pulse power measurements in X-band rectangular waveguide WR-90 up to 100 kW were developed and experimentally investigated. The first type of the sensors demonstrates higher sensitivity and larger output signal, while the second one exhibits better linearity of the output signal. The experimental investigations revealed the sensitivity variation within ± 10% in 8.2-12.2 GHz frequency band.
Źródło:
Acta Physica Polonica A; 2009, 115, 6; 1122-1124
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Influence of the Microwave Power on Josephson Microwave Absorption in High- Temperature Superconductors
Autorzy:
Czyżak, B.
Stankowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/1887983.pdf
Data publikacji:
1991-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
74.50.+r
74.70.Vy
Opis:
The influence of the microwave power on the internal Josephson Junction System (JJS) in granular high T$\text{}_{c}$, superconductors was investigated using EPR methodology. Josephson Microwave Absorption signal was used to monitor local temperature of the Josephson Junction System while the bulk sample temperature was measured by a thermocouple. The effect of the JJS overheating is discussed as the consequence of an interaction between JJS, microwave field and the bulk sample.
Źródło:
Acta Physica Polonica A; 1991, 80, 1; 99-106
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A 100 W ISM 2.45 GHz-band power test system
Autorzy:
Wojtasiak, W.
Gryglewski, D.
Gwarek, W.
Powiązania:
https://bibliotekanauki.pl/articles/307777.pdf
Data publikacji:
2005
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
microwave precise heating
high power solid-state amplifier
push-pull GaAs FET
synthetsizer
power measurement unit
Opis:
This paper describes development of solid-state microwave power test system (MPTS) operating over 2.3 to 2.6 GHz with the output power level of 100 W for industrial applications in material processing, and for designing of microwave power industrial equipment. The MPTS unit consists of four major parts: PLL synthesizer, high power solid-state amplifier, detector probes for return losses and leakage measurement and microcontroller. The MPTS system is able to operate in either single fixed-frequency regime, or in swept mode with self-tuning for minimum reflection of a heated load.
Źródło:
Journal of Telecommunications and Information Technology; 2005, 2; 23-28
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
TEm,1 coaxial modes generator for cold-testing of high power components and devices
Autorzy:
Jaworski, Grzegorz
Francik, Andrzej
Nowak, Kacper
Powiązania:
https://bibliotekanauki.pl/articles/2173659.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
cold testing
high power components
microwave path
mode generator
test na zimno
komponent o dużej mocy
ścieżka mikrofalowa
generator trybów
Opis:
In this paper, we describe the development and design procedure of the new kind of coaxial TEm,1 modes generator based on ring resonator with coupling apertures. The generator enables excitation of subsequent TEm,1 modes in a cylindrical waveguide. The proposed design method allows to obtain high purity TEm,1 modes. The angular mode number can be chosen by replacing the plate with coupling apertures. Structure and parameters of the generator was optimized using CST-Microwave Studio. The mode generator was fabricated and checked on the test bench in an anechoic chamber. The measured field distributions confirm excitation of the desired TEm,1 modes. A good agreement between simulations and measurements is obtained. The presented mode generator, operating in non-rotating TEm,1 modes, is easy to fabricate, and suitable for cold-test experiments of high power components and devices.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2022, 70, 2; art. no. e140467
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modyfikowane radiacyjnie kompozyty polimerowe w ochronie przed promieniowaniem mikrofalowym
Radiation modified polymer composites in protection from microwave radiation
Autorzy:
Głuszewski, W.
Kubacki, R.
Rajkiewicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/214300.pdf
Data publikacji:
2017
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
polimerowe kompozyty
promieniowanie mikrofalowe
sieciowanie radiacyjne
impuls elektromagnetyczny
polymer composites
microwave radiation
radiation crosslinking
high power microwaves
Opis:
Niezabezpieczone odpowiednio urządzenia i podzespoły elektroniczne, w których znajdują się układy scalone ulegają bezpowrotnemu zniszczeniu pod wpływem wysokomocowych impulsów elektromagnetycznych - HPM [1]. Urządzenia generujące HPM mogą być zastosowane do działań wojskowych, ale również w celach terrorystycznych [2]. W artykule podsumowano wyniki wstępnych badań w zakresie radiacyjnej modyfikacji kompozytów polimerowych skutecznych w ochronie przed działaniem promieniowań mikrofalowych i radiowych. Prace dotyczyły konkretnego zadania - znalezienia absorbera do pomiarów na otwartych poligonach badawczych. Zbadano pod tym kątem modyfikowany radiacyjnie kompozyt: szkło metaliczne, grafit, elastomer Engage 8200.
Improperly secured electronic devices and components, which include integrated circuits are irrevocably destroyed by high power electromagnetic pulse - HPM [1]. HPM generating device can be used for military operations, but also for terrorist purposes [2]. The article summarizes the results of preliminary research in the field of radiation modification of polymer composites effective in protecting against microwave and radio radiations. The work was related to a particular task - finding absorber for measurements on open research proving grounds. From this angle radiation modified composites were examined: metallic glass, graphite, elastomer Engage 8200.
Źródło:
Postępy Techniki Jądrowej; 2017, 1; 20-23
0551-6846
Pojawia się w:
Postępy Techniki Jądrowej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
International Linear Collider Global and Local Implications
Autorzy:
Romaniuk, R. S.
Powiązania:
https://bibliotekanauki.pl/articles/226596.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
ILC
ILC-GDE
LCC
SRF
accelerators
particle colliders
linacs
superconductivity
high energy physics experiments
elementary particles
hadrons
electron beams
positron beams
microwave resonant cavities
high power 1,3 GHz systems
superconducting RF electronics
Opis:
ILC machine–International Liner Collider, is one of two accelerators e+e-just under design and advanced consideration to be built with final energy of colliding electron and positron beams over 1 TeV. An alternative project to ILC is CLIC in CERN The ILC machine is an important complementary addition for the research potential of the LHC accelerator complex. The required length of ILC is minimally 30 km, but some versions of the TDR estimates mention nearly 50km. Superconducting RF linacs will be built using well established 1,3 GHz TESLA technology using ultrapure niobium or Nb3Sn resonant microwave cavities of RRR class, of ultimate finesse, working with gradients over 35MV/m, while some versions of the design mention ultimate confinement as high as 50MV/m. Several teams from Poland (Kraków. Warszawa, Wrocław – IFJ-PAN, AGH, UJ, NCBJ, UW, PW, PWr, INT-PAN) participate in the global design effort for this machine – including detectors, cryogenics, and SRF systems. Now it seems that the ILC machine will be built in Japan, during the period of 2016-2026. If true, Japan will turn to a world super-power in accelerator technology no.3 after CERN and USA. The paper summarizes the state-of-the-art of technical and administration activities around the immense ILC and CLIC machines, with emphasis on potential participation of Polish teams in the global effort of newly established LCC –The Linear Collider Consortium.
Źródło:
International Journal of Electronics and Telecommunications; 2014, 60, 2; 181-185
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-13 z 13

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