2024-03-29T10:38:20Z
http://ijet.pl/index.php/ijet/oai
oai:ojs.ijet.ise.pw.edu.pl:article/3281
2022-03-08T12:08:28Z
ijet:MICROWAVE
Optimal Method for Polarization Selection of Stationary Objects Against the Background of the Earth’s Surface
Volosyuk, Valerii
Zhyla, Simeon
Pavlikov, Vladimir
Ruzhentsev, Nikolay
Tserne, Eduard
Popov, Anatoliy
Shmatko, Oleksandr
Dergachov, Kostiantyn
Havrylenko, Olena
Ostroumov, Ivan
Kuzmenko, Nataliia
Sushchenko, Olga
Averyanova, Yuliya
Zaliskyi, Maksym
Solomentsev, Oleksandr
Kuznetsov, Borys
Nikitina, Tatyana
English=en
Within the maximum likelihood method an optimalalgorithm for polarization target selection against the backgroundof interfering signal reflected from the earth’s surface is synthesized. The algorithm contains joint operations of spectralinterference rejection and their polarization compensation bymeans of certain combinations of interchannel subtraction ofsignals of different polarizations. The physical features of theelements of the polarization scattering matrix are investigatedfor the technical implementation of the synthesized algorithm.
Electronics and Telecommunications Committee
2022-02-26
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://ijet.pl/index.php/ijet/article/view/10.24425-ijet.2022.139852
International Journal of Electronics and Telecommunications; Vol 68, No 1 (2022); 83-89
2300-1933
eng
http://ijet.pl/index.php/ijet/article/view/10.24425-ijet.2022.139852/931
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.24425-ijet.2022.139852/2773
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.24425-ijet.2022.139852/2774
Copyright (c) 2022 International Journal of Electronics and Telecommunications
oai:ojs.ijet.ise.pw.edu.pl:article/757
2017-10-31T00:24:38Z
ijet:MICROWAVE
Design and Optimization of Rectangular Waveguide Filter based on Direct Coupled Resonators
Damou, Mehdi
Keltouma, Nouri
Mohammed, Chetioui
Mohammed, Feham
The waveguide filter structure is treated by two softwares (HFSS (High Frequency Structure Simulator) and CST (Computer Simulation Technology)). Numerical example is given in this article to demonstrate, step by step, the application of the approach to the design of resonator, direct coupled waveguide and microstrip filters based on electromagnetic (EM) simulations. For this design procedure, the filter structure is simulated by successively adding one resonator at a time. To continue the work illustrates how to design a fourth order coupled resonator based rectangular waveguide circuit in the traditional way. With a large number of variables, such tuning work consumes a lot of time and the convergence of the final result is not guaranteed. A fourth order X-band bandpass filter with a center frequency of 11 GHz and a fractional bandwidth FBW = 0,0273 is designed using this procedure and presented here as an example. The simulated results by CST are presented and compared withthe results simulated by a high-frequency structure simulator. Good agreement between the simulated HFSSand simulated results by CST is observed.
Electronics and Telecommunications Committee
2017-10-31
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://ijet.pl/index.php/ijet/article/view/10.1515-eletel-2017-0051
International Journal of Electronics and Telecommunications; Vol 63, No 4 (2017); 375-380
2300-1933
eng
http://ijet.pl/index.php/ijet/article/view/10.1515-eletel-2017-0051/412
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.1515-eletel-2017-0051/645
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.1515-eletel-2017-0051/649
Copyright (c) 2017 International Journal of Electronics and Telecommunications
oai:ojs.ijet.ise.pw.edu.pl:article/3540
2022-11-30T22:59:34Z
ijet:MICROWAVE
Modeling and Design of a Highly Efficient Switch-Mode RF/Microwave Power Amplifier Based-on Microstrip Bandpass Filter
Moloudi, Farzad
Eslamipour, Omid
Khoshnoud, Ali
Electrical Engineering; Microwave Engineering; RF circuit
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.
Electronics and Telecommunications Committee
2022-11-30
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://ijet.pl/index.php/ijet/article/view/10.24425-ijet.2022.143885
International Journal of Electronics and Telecommunications; Vol 68, No 4 (2022); 775-781
2300-1933
eng
http://ijet.pl/index.php/ijet/article/view/10.24425-ijet.2022.143885/1030
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.24425-ijet.2022.143885/3617
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.24425-ijet.2022.143885/3618
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.24425-ijet.2022.143885/3619
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.24425-ijet.2022.143885/3620
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.24425-ijet.2022.143885/3621
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.24425-ijet.2022.143885/3738
Copyright (c) 2022 International Journal of Electronics and Telecommunications
oai:ojs.ijet.ise.pw.edu.pl:article/2388
2020-02-06T15:08:31Z
ijet:MICROWAVE
Design of millimeter-wave six-port device for LTCC technology
Słojewska, Barbara Aleksandra
Yashchyshyn, Yevhen
In this paper a design of millimeter-wave six-port device for LTCC (Low Temperature Cofired Ceramic) technology is presented. Furthermore, problems with implementation of the project taking into account requirements of LTCC technology are discussed.
Electronics and Telecommunications Committee
2020-02-06
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://ijet.pl/index.php/ijet/article/view/10.24425-ijet.2019.130263
International Journal of Electronics and Telecommunications; Vol 66, No 1 (2020); 37-43
2300-1933
eng
http://ijet.pl/index.php/ijet/article/view/10.24425-ijet.2019.130263/648
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.24425-ijet.2019.130263/1802
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.24425-ijet.2019.130263/1803
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.24425-ijet.2019.130263/1942
Copyright (c) 2020 International Journal of Electronics and Telecommunications
oai:ojs.ijet.ise.pw.edu.pl:article/179
2015-03-10T23:31:30Z
ijet:MICROWAVE
Noise Analysis of Differential Multiport Networks - the Wave Approach
Dobrowolski, Janusz
Microwave Theory and Techniques, CAD
In this paper there is presented and discussed a general analysis method for noise characterization of noisy multiport differential networks. It is based on mixed mode, differential and common mode, noise waves representation of noise, generalized mixed-mode scattering parameters and generalized mixed-mode noise wave correlation parameters for the network. There are derived analytical relation between the noise figure for a given output port and the noise matrix and the scattering parameters of the network, as well as the correlations between the input port noise waves. The signal to noise ratio degradation factor is derived and discussed, too. Presented results can be implemented directly in a CAD software noise analysis of differential microwave multiport networks with differential as well as with conventional single ended ports.
Electronics and Telecommunications Committee
Institute of Electronic Systems, Warsaw University of Technology, Warsaw, Poland
2014-12-07
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://ijet.pl/index.php/ijet/article/view/10.2478-eletel-2014-0036
International Journal of Electronics and Telecommunications; Vol 60, No 4 (2014); 281-286
2300-1933
eng
http://ijet.pl/index.php/ijet/article/view/10.2478-eletel-2014-0036/46
oai:ojs.ijet.ise.pw.edu.pl:article/3616
2022-05-31T02:27:45Z
ijet:MICROWAVE
Millimeter-Wave Transmitter with LTCC Antenna and Silicon Lens
Bajurko, Paweł
Sobolewski, Jakub
Bogdan, Grzegorz
Godziszewski, Konrad
Marczewski, Jacek
Kulawik, Jan
Widlok, Michał
Yashchyshyn, Yevhen
antenna-in-package; LTCC circuits and modules; millimeter-waves; RF modules; RFIC and MMIC packaging; silicon lenses
Millimeter-wave (mm-wave) transmitters are often fabricated using advanced technology and require a sophisticated manufacturing facility. Access to such technologies is often very limited and difficult to gain particularly at the initial stage of research. Therefore, to increase the accessibility of mm-wave transmitters, this study proposes a design that can be assembled in a standard microwave laboratory from commercially available or externally ordered components. The transmitter demonstrated in this paper operates above 100 GHz and is based on a low-temperature co-fired ceramic board in which the antenna array, microstrip lines, and power-supply lines are fabricated in a single process. Different technologies are used to assemble the module, e.g., wire-bonding, soldering, and wax adhesion. Advantages and disadvantages of the proposed design are given based on experimental evaluation of the prototype. Although the performance of the developed transmitter is not as good as that of the similar modules available in the recent literature, the results confirm the feasibility of a mm-wave transmitter that is assembled without employing advanced technologies and superior machinery.
Electronics and Telecommunications Committee
The National Center for Research and Development (NCBiR) in Poland
2022-05-31
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://ijet.pl/index.php/ijet/article/view/10.24425-ijet.2022.139877
International Journal of Electronics and Telecommunications; Vol 68, No 2 (2022); 267-273
2300-1933
eng
http://ijet.pl/index.php/ijet/article/view/10.24425-ijet.2022.139877/964
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.24425-ijet.2022.139877/3222
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.24425-ijet.2022.139877/3223
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.24425-ijet.2022.139877/3316
Copyright (c) 2022 International Journal of Electronics and Telecommunications
oai:ojs.ijet.ise.pw.edu.pl:article/1109
2018-02-01T12:59:01Z
ijet:MICROWAVE
Frequency dependent mismatch correction scheme for Zero-IF receivers
Hibner, Rafal
Zielinski, Ryszard
ZIF; quadrature; compensation; SFDR; wideband
This paper shows effective method of linear distortions compensation in zero-IF receivers. With application of frequency domain processing a computation efficient method was developed that allows to correct quadrature mismatch in Zero-IF receiver along with gain and group delay independent of receiving signal type. Method was implemented and tested on hardware platform confirming its effectiveness.
Electronics and Telecommunications Committee
2018-01-31
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://ijet.pl/index.php/ijet/article/view/10.24425-118140
International Journal of Electronics and Telecommunications; Vol 64, No 1 (2018); 13-18
2300-1933
eng
http://ijet.pl/index.php/ijet/article/view/10.24425-118140/429
Copyright (c) 2018 International Journal of Electronics and Telecommunications
oai:ojs.ijet.ise.pw.edu.pl:article/4506
2024-03-18T16:07:31Z
ijet:MICROWAVE
Resonant Frequencies of TE0mn modes in multilayered dielectric-ferrite resonators with complex shapes
Derzakowski, Krzysztof
dielectric resonator; Maxwell’s equations; radial modes matching method; initial permeability
The method of evaluating the resonant frequencies of multilayered resonator containing demagnetized ferrites is presented. The detailed solution of Maxwell's equations for such a structure by means of the radial modes matching method for TE0mn modes is given. The results of calculations using developed and launched computer program are given. Results of calculations are compared with those obtained by other method using CST simulator. These results are in close agreement, which proves the correctness of the method. The developed solution, and the software program can be used to measure the initial permeability of ferrites.
Electronics and Telecommunications Committee
2024-03-18
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://ijet.pl/index.php/ijet/article/view/10.24425-ijet.2024.149537
International Journal of Electronics and Telecommunications; Vol 70, No 1 (2024); 247-252
2300-1933
eng
http://ijet.pl/index.php/ijet/article/view/10.24425-ijet.2024.149537/1205
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.24425-ijet.2024.149537/4510
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.24425-ijet.2024.149537/4530
Copyright (c) 2024 International Journal of Electronics and Telecommunications
oai:ojs.ijet.ise.pw.edu.pl:article/2382
2020-02-06T15:08:31Z
ijet:MICROWAVE
Wireless Capsule Endoscope Localization with Phase Detection Algorithm and Simplified Human Body Model
Oleksy, Paweł
Januszkiewicz, Łukasz
Endoscopes, Simplified human body models, Wireless localization, Wireless communication
Wireless endoscopic capsules can visualize the inside of the digestive tract for the purpose of gastrointestinal diseases diagnose. In order to implement the appropriate treatment method, the transmitted picture should be followed by the information on the location of the endoscope. The article presents the method of localization of endoscopic capsules with wireless transmitter based on the detection of phase difference of signals in the receiver located on patients body. The proposed method uses simplified human body models that can change their dielectric properties to improve the location of the capsule endoscope.
Electronics and Telecommunications Committee
2020-02-06
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://ijet.pl/index.php/ijet/article/view/10.24425-ijet.2019.130264
International Journal of Electronics and Telecommunications; Vol 66, No 1 (2020); 45-51
2300-1933
eng
http://ijet.pl/index.php/ijet/article/view/10.24425-ijet.2019.130264/649
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.24425-ijet.2019.130264/1918
Copyright (c) 2020 International Journal of Electronics and Telecommunications
oai:ojs.ijet.ise.pw.edu.pl:article/280
2015-12-29T16:44:16Z
ijet:MICROWAVE
Noise Characterization of Differential Multi-Element Multiport Networks - the Wave Approach
Dobrowolski, Janusz
Microwave Theory and Techniques
In this paper there is presented and discussed a general analysis method for noise characterization of noisy multi-element multiport differential networks. It is based on mixed mode, differential and common mode, noise waves representation of noise, generalized mixed-mode scattering parameters and generalized mixed-mode noise wave correlation parameters for the network. There are derived analytical relation between the noise figure for a given output port and the noise matrix and the scattering parameters of the network, as well as the correlations between the input port noise waves. The signal to noise ratio degradation factor is derived and discussed, too. Presented results can be implemented directly in a CAD software for noise analysis of differential microwave multi-element multiport networks with differential as well as with conventional single ended ports.
Electronics and Telecommunications Committee
2015-12-24
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://ijet.pl/index.php/ijet/article/view/10.1515-eletel-2015-0052
International Journal of Electronics and Telecommunications; Vol 61, No 4 (2015); 395-401
2300-1933
eng
http://ijet.pl/index.php/ijet/article/view/10.1515-eletel-2015-0052/219
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.1515-eletel-2015-0052/400
Copyright (c) 2015 International Journal of Electronics and Telecommunications
oai:ojs.ijet.ise.pw.edu.pl:article/3822
2022-11-30T22:59:34Z
ijet:MICROWAVE
Design of a GSM 900 Energy Harvesting Model for a Remote-Control device
Nayak, Deepak Kumar
Muduli, Arjuna
This paper deals with designing and simulation of an efficient RF-DC energy harvesting system for a remote control device. GSM downlink frequency of 935MHz to 960MHz and uplink frequency of 890MHz to 915MHz is taken as the RF source with centre frequency as 950MHz and 900MHz respectively. The simulation model has been created by using Advanced Design System (ADS) software. The performance of the circuit has been tested with matching and without matching circuits. The output voltage obtained was 0.372V DC and maximum efficiency up to 35.73% was achieved for the downlink GSM frequency by the lumped method for -10dB input source power. By considering more number of rectifier stages, output DC voltage can be increased and it can be utilized for replacing the DC battery of the remote control device.
Electronics and Telecommunications Committee
2022-11-30
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://ijet.pl/index.php/ijet/article/view/10.24425-ijet.2022.143884
International Journal of Electronics and Telecommunications; Vol 68, No 4 (2022); 767-773
2300-1933
eng
http://ijet.pl/index.php/ijet/article/view/10.24425-ijet.2022.143884/1028
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.24425-ijet.2022.143884/3440
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.24425-ijet.2022.143884/3441
Copyright (c) 2022 International Journal of Electronics and Telecommunications
oai:ojs.ijet.ise.pw.edu.pl:article/1037
2018-02-01T12:59:01Z
ijet:MICROWAVE
Wideband Nine-Port Reflectometer
Odrobina, Szczepan
Staszek, Kamil
Wincza, Krzysztof
Gruszczyński, Sławomir
multiport measurement technique; reflectometer; reflection coefficient; measurement uncertainty; directional coupler; power divider; phase shifter
The paper presents a wideband nine-port reflectometer realized as a cascade connection of six- and five-port reflectometers. It is shown that such a solution allows for a convenient adjustment of circuits’ parameters in order to provide significantly reduced measurement uncertainty with respect to other reported reflectometers. Simultaneously, the proposed network features a simple and flexible design. For the experimental verification, the proposed nine-port reflectometer has been manufactured and incorporated into the system intended for reflection coefficient measurements within the frequency range 2.5 – 3.5 GHz. The obtained results are in an excellent agreement with the values measured using a commercial VNA.
Electronics and Telecommunications Committee
AGH University of Science and Technology, Faculty of Computer Science, Electronics and Telecommunications (Dean’s Grant)
2018-01-31
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://ijet.pl/index.php/ijet/article/view/10.24425-118141
International Journal of Electronics and Telecommunications; Vol 64, No 1 (2018); 19-25
2300-1933
eng
http://ijet.pl/index.php/ijet/article/view/10.24425-118141/430
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.24425-118141/843
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.24425-118141/844
Copyright (c) 2018 International Journal of Electronics and Telecommunications
oai:ojs.ijet.ise.pw.edu.pl:article/3181
2021-08-31T09:43:27Z
ijet:MICROWAVE
SIW/HMSIW Bandpass Filters for Ka Frequency Band Serving Wireless Applications
Damou, Mehdi
Benallou, Yacine
Mansouri, Boualem
Nouri, Keltouma
Chetioui, Mohammed
Boudkhil, Abdelhakim
This paper describes a novel Substrate Integrated Waveguide (SIW) bandpass filter using Chebyshev approximation and Half Mode Substrate Integrated Waveguide (HMSIW) modeling technique. The developed 3rd order filter structure uses an inductive iris and an inductive post station in a way it resonates in Ka frequency band serving wireless applications. The paper presents in details steps of the filter design formed by specific analytical equations to extract its different synthesizable parameters including coupling matrix, quality factor and initial geometric dimensions. The ideal frequency response of the filter is determined from an equivalent circuit that uses localized elements developed by AWR Microwave Software. High Frequency Structure Simulator (HFSS) is then employed to model the proposed filter structure and optimize its initial parameters until meeting the target specifications initially fixed in order to provide a high frequency response for the proposed filter design. Finally, the obtained results display a good performance for the proposed filter design and demonstrate a high usefulness for the employed technology that allows a low design volume.
Electronics and Telecommunications Committee
2021-08-30
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://ijet.pl/index.php/ijet/article/view/10.24425-ijet.2021.137820
International Journal of Electronics and Telecommunications; Vol 67, No 3 (2021); 355-361
2300-1933
eng
http://ijet.pl/index.php/ijet/article/view/10.24425-ijet.2021.137820/827
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.24425-ijet.2021.137820/2651
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.24425-ijet.2021.137820/2841
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.24425-ijet.2021.137820/2842
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.24425-ijet.2021.137820/2846
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.24425-ijet.2021.137820/2847
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.24425-ijet.2021.137820/2848
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.24425-ijet.2021.137820/2882
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.24425-ijet.2021.137820/2883
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.24425-ijet.2021.137820/2886
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.24425-ijet.2021.137820/2887
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.24425-ijet.2021.137820/2888
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.24425-ijet.2021.137820/2889
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.24425-ijet.2021.137820/2895
Copyright (c) 2021 International Journal of Electronics and Telecommunications
oai:ojs.ijet.ise.pw.edu.pl:article/313
2016-03-30T07:27:52Z
ijet:MICROWAVE
Differential Noise Figure and Gain De-Embedding: the Wave Approach
Dobrowolski, Janusz Andrzej
microwave theory and Techniques
The paper presents complete analysis of differential amplifier noise figure single-ended measurement setup. The analysis is based on scattering matrix representation for the network and wave representation for noise. As a result, there are presented equations allowing the differential amplifier gain and noise figure to be de-embedded with single-ended measurements. De-embedding equations are given for the balanced amplifier and for the fully differential amplifier.
Electronics and Telecommunications Committee
2016-03-30
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://ijet.pl/index.php/ijet/article/view/10.1515-eletel-2016-0009
International Journal of Electronics and Telecommunications; Vol 62, No 1 (2016); 65-69
2300-1933
eng
http://ijet.pl/index.php/ijet/article/view/10.1515-eletel-2016-0009/239
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.1515-eletel-2016-0009/222
Copyright (c) 2016 International Journal of Electronics and Telecommunications
oai:ojs.ijet.ise.pw.edu.pl:article/3695
2023-02-27T00:37:28Z
ijet:MICROWAVE
Design and Development of 3-D Printed RDRA for Polarization Reconfigurability in C-band.
Apparao, Maganti
Karunakar, Godi
Microwave Antenna, Dielectric Resonator Antenna
In this article, a 3D printed rectangular dielectric resonator antenna which is capable of polarization reconfiguration has been designed. Dielectric resonator is composed of environment friendly and biodegradable material, which is Polylactic Acid. In the proposed model, the polarization can be switch from a linear to a circular by changing the state of a switch, electonically. The antenna switch between two different polarizations: Linear polarization during OFF STATE and Left-hand circular polarization during ON STATE. The proposed 3D printed dielectric resonator antenna is designed to operate in C-band of microwave spectrum, with a broad effective bandwidth (overlapped impedance bandwidths of both states) of 14.542% with centre frequency at 5.845GHz and peak gain 5.5dBi. Further, validated simulated results with experiment and both results are in good agreement.
Electronics and Telecommunications Committee
2023-02-27
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://ijet.pl/index.php/ijet/article/view/10.24425-ijet.2023.144333
International Journal of Electronics and Telecommunications; Vol 69, No 1 (2023); 69-74
2300-1933
eng
http://ijet.pl/index.php/ijet/article/view/10.24425-ijet.2023.144333/1058
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.24425-ijet.2023.144333/3322
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.24425-ijet.2023.144333/3323
Copyright (c) 2023 International Journal of Electronics and Telecommunications
oai:ojs.ijet.ise.pw.edu.pl:article/2076
2020-06-01T14:11:57Z
ijet:MICROWAVE
Installation for concentrated uniform heating of objects by microwave radiation
Ritter, Dmitry Viktorovich
Cieslik, Jacek
Kismereshkin, Vladimir
Savostin, Alexey
Ritter, Ekaterina
Nabiev, Nabi
Microwave engineering
A design of microwave installation for energy concentration on a surface of a heated object is proposed. In the installation a dipole lattice on the basis of a single-wire transmission line is used which is located inside of reflector in a form of specular parabolic conducting cylinder. The heated object is placed in the area of microwave energy concentration.In the article a waveguide field of a surface wave in a reradiation mode is explored. The surface wave is reradiated by a group of vibrators coaxial with the waveguide wire. Results of experimental studies of field distribution along the waveguide operating in various modes are presented. The possibility of efficiency increase in reradiated field and its adjustment by contactless movement of reflector is shown.
Electronics and Telecommunications Committee
2020-06-01
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://ijet.pl/index.php/ijet/article/view/10.24425-ijet.2020.131877
International Journal of Electronics and Telecommunications; Vol 66, No 2 (2020); 295-300
2300-1933
eng
http://ijet.pl/index.php/ijet/article/view/10.24425-ijet.2020.131877/695
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.24425-ijet.2020.131877/2208
Copyright (c) 2020 International Journal of Electronics and Telecommunications
oai:ojs.ijet.ise.pw.edu.pl:article/57
2014-07-01T15:57:54Z
ijet:MICROWAVE
Differential and Common Mode Noise Waves and Correlation Matrices
Dobrowolski, Janusz A.
microwave theory and techniques
This paper presents an innovative extension of the noise wave definition to mixed mode, differential – and common-mode noise waves which can be used for noise analysis of differential microwave networks. Mixed mode noise waves are used next to define generalized mixed mode noise wave correlation matrices of microwave multiport networks. Presented approach may be used for noise analysis of microwave differential networks with differential ports as well as with conventional single ended ports.
Electronics and Telecommunications Committee
2014-06-30
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://ijet.pl/index.php/ijet/article/view/10.2478-eletel-2014-0016
International Journal of Electronics and Telecommunications; Vol 60, No 2 (2014); 133–141
2300-1933
eng
http://ijet.pl/index.php/ijet/article/view/10.2478-eletel-2014-0016/23
oai:ojs.ijet.ise.pw.edu.pl:article/3251
2021-12-29T14:50:12Z
ijet:MICROWAVE
Micromechanically Tunable Dielectric Rod Resonator
Savin, Kostiantyn
Golubeva, Irina
Kazmirenko, Victor
Prokopenko, Yuriy
Vandenbosch, Guy A. E.
dielectric resonator; resonant frequency; electromechanical tuning; quality factor; mode matching technique
A resonant frequency control method for dielectric rod resonators is discussed. A dielectric rod of cylindrical shape is placed inside a metal cavity. The bottom face of the dielectric rod is fixed at the metal base plate. Resonant frequency tuning is achieved by lifting the top metal plate above the dielectric rod upper face. The paper presents simulations using the mode matching technique and experimental study of this tunable resonator. Resonant frequency of the basic mode can be tuned by more than an octave with displacements of only tens of micrometres, which is in range of piezoactuators, MEMS, etc. A distinct feature of the proposed tuning technique is that the quality factor of the system does not degrade throughout the tuning range.
Electronics and Telecommunications Committee
2021-12-01
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://ijet.pl/index.php/ijet/article/view/10.24425-ijet.2021.137854
International Journal of Electronics and Telecommunications; Vol 67, No 4 (2021); 615-621
2300-1933
eng
http://ijet.pl/index.php/ijet/article/view/10.24425-ijet.2021.137854/918
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.24425-ijet.2021.137854/2737
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.24425-ijet.2021.137854/2738
Copyright (c) 2021 International Journal of Electronics and Telecommunications
oai:ojs.ijet.ise.pw.edu.pl:article/580
2017-08-14T21:46:22Z
ijet:MICROWAVE
Analysis of Substrate Integrated Waveguide (SIW) Resonator and Design of Miniaturized SIW Bandpass Filter
RHBANOU, AHMED
Bri, Seddik
Sabbane, Mohamed
substrate integrated waveguide; dielectric materials; cavity resonator; band-pass filter; low temperature co-fired ceramic
In this paper, the substrate integrated waveguide (SIW) resonator is designed to study the influence of dielectric materials on its operating parameters (insertion loss, fractional bandwidth and unloaded Q-factor). The results obtained show that the use of high permittivity substrate in the SIW resonator by increasing its thickness allows reducing the size of resonator by causing the increase in its unloaded Q-factor. A SIW bandpass filter is designed using low temperature co-fired ceramic (LTCC) technology and high permittivity substrate. The filter has a fractional bandwidth of 27 % centered at 14.32 GHz with insertion loss of 0.7 dB.
Electronics and Telecommunications Committee
2017-08-14
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://ijet.pl/index.php/ijet/article/view/10.1515-eletel-2017-0034
International Journal of Electronics and Telecommunications; Vol 63, No 3 (2017); 255-260
2300-1933
eng
http://ijet.pl/index.php/ijet/article/view/10.1515-eletel-2017-0034/395
Copyright (c) 2017 International Journal of Electronics and Telecommunications
oai:ojs.ijet.ise.pw.edu.pl:article/3661
2022-08-28T10:43:17Z
ijet:MICROWAVE
Design of a Dual-Band Rectangular Waveguide Filter based on Direct Coupled
Slimane, Gouni
Mehdi, Damou
Mohammed, Chetioui
Abdelhakim, Boudkhil
This paper presents how to design and simulate a passband rectangular waveguide filters based on direct coupled resonators operating at 12 GHz. The modeled filters are characterized by a cross coupling that produces a single attenuation pole at finite frequency used to shape the bandpass response. Resonators provide bandpass filter designs with a pseudo-elliptic response using HFSS simulators. Transmission zeros are obtained through coupling between the fundamental mode and high mode. The filter structures are validated leading to obtain transmission zeros close to the passband. The simulated waveguide filters with a centre frequency exhibit an insertion loss of -0.4/0.3dB and a return loss of −20/23dB for a bandwidth ranging from 11.85GHz to 12.15GHz that shows good electromagnetic responses for the simulated filters
Electronics and Telecommunications Committee
2022-08-27
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://ijet.pl/index.php/ijet/article/view/10.24425-ijet.2022.141264
International Journal of Electronics and Telecommunications; Vol 68, No 3 (2022); 483-488
2300-1933
eng
http://ijet.pl/index.php/ijet/article/view/10.24425-ijet.2022.141264/988
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.24425-ijet.2022.141264/3283
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.24425-ijet.2022.141264/3535
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.24425-ijet.2022.141264/3536
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.24425-ijet.2022.141264/3537
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.24425-ijet.2022.141264/3547
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.24425-ijet.2022.141264/3548
Copyright (c) 2022 International Journal of Electronics and Telecommunications
oai:ojs.ijet.ise.pw.edu.pl:article/1690
2019-10-21T18:07:30Z
ijet:MICROWAVE
Perturbation Element Effect on Frequency Stability in Dual Mode Reconfigurable Filters Based On Circular Microstrip Ring Resonators
Albahnasi, Muhamad Haitham
Malki, Adnan
Almekdad, Shokri
A detailed study about the suitable perturbation element shape and location for tunable BW dual mode microstrip filter which has circular ring resonator is presented. BW tuning is achieved by resonator geometry modification. The study explains the effect of a perturbation element on the stability of the center frequency during BW tuning. Different cases have been studied for two shapes of perturbation element; which one is a rectangular and the other is a radial. The treated cases discuss whether the perturbation element is located in the inner or in the outer circumference of the ring, and whether it is a patch or a notch. BW tuning simulation treated the case of increase for two and three times. The best case of perturbation element which has the best center frequency stability has been modeled, simulated, and fabricated at 2.4 GHz. Geometry modification of the filter took into account the RF MEMS modeling. The filter has an elliptic frequency response, and its FBW has been increased in five steps from 1.7% to 5%. The designed filters were evaluated experimentally and by simulation with very good agreement.
Electronics and Telecommunications Committee
2019-10-14
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://ijet.pl/index.php/ijet/article/view/10.24425-ijet.2019.130256
International Journal of Electronics and Telecommunications; Vol 65, No 4 (2019); 731-737
2300-1933
eng
http://ijet.pl/index.php/ijet/article/view/10.24425-ijet.2019.130256/640
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.24425-ijet.2019.130256/1340
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.24425-ijet.2019.130256/1341
Copyright (c) 2019 International Journal of Electronics and Telecommunications
oai:ojs.ijet.ise.pw.edu.pl:article/95
2014-09-30T17:52:02Z
ijet:MICROWAVE
Modifications of Range-Doppler Algorithm for Compensation of SAR Platform Motion Instabilities
Gorovyi, Ievgen
radiolocation; synthetic aperture radars; signal and image processing
Two modifications of the range-Doppler algorithm (RDA) have been proposed to solve problems of SAR platform motion instabilities. First, the multi-look processing based on the RDA with an extended Doppler bandwidth has been introduced for correction of radiometric errors. Second, the RDA has been modified to perform SAR image formation on short-time acquisition intervals to use it in a recently-developed local-quadratic map-drift autofocus (LQMDA) method. The performance of the methods is illustrated with experimental data obtained by airborne SAR systems
Electronics and Telecommunications Committee
2014-09-30
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
http://ijet.pl/index.php/ijet/article/view/10.2478-eletel-2014-0028
International Journal of Electronics and Telecommunications; Vol 60, No 3 (2014); 225-231
2300-1933
eng
http://ijet.pl/index.php/ijet/article/view/10.2478-eletel-2014-0028/38
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.2478-eletel-2014-0028/18
http://ijet.pl/index.php/ijet/article/downloadSuppFile/10.2478-eletel-2014-0028/19