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Wyświetlanie 1-5 z 5
Tytuł:
Modeling and Design of a Highly Efficient Switch-Mode RF/Microwave Power Amplifier Based-on Microstrip Bandpass Filter
Autorzy:
Moloudi, Farzad
Eslamipour, Omid
Khoshnoud, Ali
Powiązania:
https://bibliotekanauki.pl/articles/2200707.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
broadband
band-pass filter (BPF)
switch-mod
power amplifier (PA)
matching network (MN)
Opis:
This paper presents a broadband Switch-Mode Power Amplifier (SMPA) using a Band-Pass Filter (BPF) at the Output Matching Network (OMN). The proposed SMPA integrates a microstrip BPF as an output impedance matching network to significantly reduce the final circuit size. The microstrip lines of the filter simultaneously play the role of filtering and impedance matching. This proposed method reduces the size of the PA and reduces the power dissipation as much as possible. The BPF is placed at the output of the circuit using microstrip lines and the RT Duroid 6006 substrate. This BPF covers a wide bandwidth ranging from 3.0 GHz to 4.4 GHz. Simulation results show 9-14 dB gain with 44 - 56.6 % drain efficiency ( DE %), and the output power of 39 – 41.3 dBm would be achieved across the frequency band from 3.0 GHz to 4.4 GHz.
Źródło:
International Journal of Electronics and Telecommunications; 2022, 68, 4; 775--781
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
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:
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:
27 dBm Microwave Amplifiers with Adaptive Matching Networks
Autorzy:
Rosolowski, D.
Wojtasiak, W.
Gryglewski, D.
Powiązania:
https://bibliotekanauki.pl/articles/226524.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Adaptive Power Amplifiers (APAs)
components for Software Defined Radio
multi-band devices
multi-mode devices
RF
adaptivity
tunable matching networks
Opis:
The paper describes adaptive amplifier design with varactors and pin diodes as regulators of matching networks. As examples the two amplifiers with SHF-0189 HFET transistor and different matching sections were designed and manufactured. The output power level of 27 dBm and gain higher than 13 dB within L and S-band have been achieved. The amplifier design methodology is based on the small-signal approach and DC characteristics of transistors and regulators. Amplifier adaptivity allows us to remotely control the chosen parameters such as: frequency range, output power level, gain and etc.
Źródło:
International Journal of Electronics and Telecommunications; 2011, 57, 1; 103-108
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
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 1-5 z 5

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