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Tytuł:
Research on a scheme of generating ultra-wideband doublet signal based on the cross-gain modulation in a semiconductor optical amplifier
Autorzy:
Zhang, K.
Shao, J.
Powiązania:
https://bibliotekanauki.pl/articles/173646.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
ultra-wideband
UWB
semiconductor optical amplifier
SOA
cross-gain modulation
XGM
Opis:
We propose a novel scheme for generating ultra-wideband doublet signal based on the cross-gain modulation effect in a semiconductor optical amplifier. This scheme requires only a semiconductor optical amplifier and an optical source. By using OptiSystem software, we simulate and analyze the effect of the input signal light power and wavelength, the pulse width and injection current on the generated doublet pulse. In addition, the optimal range of parameters are also given in the simulation process.
Źródło:
Optica Applicata; 2018, 48, 1; 127-135
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optical generation of ultra-wideband signals with a reconfigurable spectral notch-band
Autorzy:
Xiang, P.
Chen, Y.
Chen, D.
Zhao, J.
Powiązania:
https://bibliotekanauki.pl/articles/174353.pdf
Data publikacji:
2014
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
ultra-wideband (UWB)
ultra-wideband over fiber
notch-band
interference avoidance
Opis:
A novel method for optical generation of ultra-wideband signals with a reconfigurable spectral notch-band is proposed. In the proposed system, ultra-wideband signals are generated in the optical domain and an optical tunable delay line is deployed to introduce a notch-band to the spectral profile of the generated ultra-wideband signals, which can effectively avoid the signal interference between ultra-wideband signals and pre-planned narrowband wireless signals used in wireless local area networks (WLAN). A theoretical model describing the proposed system is derived; the optical generation and fiber transmission of ultra-wideband signals with a reconfigurable notch-band are demonstrated via computer simulations.
Źródło:
Optica Applicata; 2014, 44, 3; 411-419
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modified Groove Coupled Compact EBG Unit Cell as Notch Filter in a UWB Antenna
Autorzy:
Sarmah, Kumaresh
Goswami, Sivaranjan
Sarma, Angana
Baruah, Sunandan
Powiązania:
https://bibliotekanauki.pl/articles/227103.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
EBG
groove feed
UWB Antenna
band notch
Opis:
In this paper, a conventional mushroom-type EBG unit cell is made compact by etching a C-slot at its conducting surface. Further, the C-slotted mushroom-type EBG unit cell is coupled with a microstrip line using a novel groove-coupling technique to design a notch filter. The arrangement has achieved in the reduction of the electrical size of the mushroom type EBG unit cell by 46.15% and create a stop band suppression of -12 dB. The proposed EBG is applied to notch a narrow band centered at 5.2 GHz along with an ultra-wideband antenna. The far field gain of the antenna is suppressed by -5.8 dBi along the direction of its major lobe at 5.2 GHz. The overall size of the antenna system is 19 x 27 x 1.6 mm³ which is compact. The performance of the antenna is validated from the simulation and measured results.
Źródło:
International Journal of Electronics and Telecommunications; 2020, 66, 2; 261-266
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zastosowanie technologii Ultra Wideband w magazynie
Application of Ultra Wideband technology in warehouse
Autorzy:
Rykała, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/1383483.pdf
Data publikacji:
2018
Wydawca:
Polskie Wydawnictwo Ekonomiczne
Tematy:
UWB
RTLS
optymalizacja
magazyn
optimization
warehouse
Opis:
Przedsiębiorstwa stale dążą do maksymalizacji swoich zysków poszukując rozwiązań optymalizujących procesy logistyczne. Rosnąca konkurencja na rynku wymusza korzystanie z coraz to nowych rozwiązań technologicznych, które pozwalają nie tylko na śledzenie procesów w czasie rzeczywistym, ale również na zwiększenie ich produktywności. Zaletami zastosowania takich systemów są niewątpliwie: możliwość śledzenia ruchu pracowników czy towarów w czasie rzeczywistym oraz ich identyfikacja. W artykule opisano technologię Ultra Wideband, przedstawiono sposób wyznaczania pozycji w tym systemie oraz wskazano możliwość zastosowania omawianej technologii w magazynie.
Enterprises are constantly pursuing to maximize their profits by looking for solutions that optimize logistics processes. Increasing competition on the market enforces the use of new technological solutions that allow not only to track processes in real time, but also to increase their productivity. The advantages of using such systems are undoubtedly: the ability to track the movement of employees or goods in real time and their identification. The article describes the Ultra Wideband technology, presents the method of determining the position in this system and indicates the possibility of applying the discussed technology in the warehouse.
Źródło:
Gospodarka Materiałowa i Logistyka; 2018, 10; 29-37
1231-2037
Pojawia się w:
Gospodarka Materiałowa i Logistyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of a Compact 4-shaped Annular Ring Ultra Wideband Antenna Using Characteristic Modes
Autorzy:
Perli, Bhaskara Rao
Rao, A. Maheswara
Powiązania:
https://bibliotekanauki.pl/articles/2055234.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
characteristic modes
multiple-strips
annular-ring
surface currents
UWB antenna
tapered structure
Opis:
This communication proposes a compact 4-shaped monopole annular ring UWB antenna design. The proposed structure contains multiple radiating strips inside the annular ring, in the form of a 4-shaped and a 50Ω microstrip feed line. A tapered structure with a feed point is chosen to achieve wideband characteristics. The proposed model is printed on a low-priced FR4 substrate with a size of 0.180₀ × 0.225₀ (20 × 25mm²). The proposed model achieves a fractional bandwidth of 133.74% in the 2.7 to 13.6 GHz range with S11<-10dB and covers the 3.1-10.6 GHz unlicensed band approved by FCC in 2002 and X-band applications. The antenna exhibits stable and Omni-directional radiation patterns in the operating frequency range. The analysis of the proposed monopole antenna using characteristic modes is performed to obtain a physical understanding of the radiation process occurring on the radiating antenna. The modal significance curves and the modal current distributions are used to analyze the radiating antenna using the first six characteristic modes. The measurement and simulation results show a good agreement.
Źródło:
International Journal of Electronics and Telecommunications; 2022, 68, 2; 229--235
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dual Port Antenna Combining Sensing and Communication Tasks for Cognitive Radio
Autorzy:
Nachouane, H.
Najid, A.
Tribak, A.
Riouch, F.
Powiązania:
https://bibliotekanauki.pl/articles/226370.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
cognitive radio
microstrip antenna
UWB
coplanar waveguide
sensing and communication tasks
sensing antenna
Opis:
Dynamic spectrum access has been proposed as the effective solution to overcome the spectrum scarcity issue, supported by cognitive radio technology. Sensing and communication functions are both the most important tasks in cognitive radio systems. In this paper, an antenna system combining sensing and communication tasks is proposed to be integrated into cognitive radio front-ends. The sensing task is performed by means of an ultra-wideband quasi-omnidirectional antenna. Whilst the communication task is ensured by using a narrowband antenna. Both antennas have been designed on the same layer of an FR4 substrate, for manufacturing cost constraint. Therefore, the isolation between them must take into consideration. The measured mutual coupling of less than -18 dB is achieved over the whole impedance bandwidth. The proposed sensing antenna covers a wide range frequency bands ranging from 2 to 5.5 GHz. While the communication antenna operates at 2.8 GHz, and by adding inductors to the antenna, the resonant frequency can be tuned from 2.6 to 2.7 GHz. The whole antenna system was designed, fabricated, and tested. Measurement and simulation results prove the feasibility of the proposed structure for cognitive radio applications.
Źródło:
International Journal of Electronics and Telecommunications; 2016, 62, 2; 121-127
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Band Notch Characteristics Reconfigurable UWB Leaf Shape Monopole Antenna
Autorzy:
Muthusamy, Pachiyaannan
Nallapaneni, Srikanta
Perumalla, Krishna Chaitanya
Punna, Bharghava
Powiązania:
https://bibliotekanauki.pl/articles/2055232.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
band notch
PIN diode
leaf shape monopole antenna
reconfigurable
UWB
Opis:
In this paper a band notch characteristics reconfigurable UWB leaf shape monopole antenna is reported. The proposed antenna size is 42×32×1.6 mm³ and simulated S11-10dB impedance bandwidth is from 2.1 to 13.0 GHz. The notch bands are embodied into the designed antenna to suppress Bluetooth and WiFi bands from 2.3-2.7 GHz and 4.6-5.3 GHz. The PIN Diode is loaded to slot on the DGS to achieve notch bands. It has 4.48dB and 1.7dB gain achieved when diode ON and OFF condition. Further, it encompasses a bio-inspired leaf shape patch having high feasibility for deployment in secret and military purposes.
Źródło:
International Journal of Electronics and Telecommunications; 2022, 68, 2; 223--228
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Converged ultra-wideband and multi-level wired signal downstream transport over single wavelength in wavelength-division multiplexing passive optical network
Autorzy:
Ma, H
Wang, F.
Wang, W.
Zhang, X
Yu, Q.
Powiązania:
https://bibliotekanauki.pl/articles/174929.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
ultra-wideband (UWB)
multi-level amplitude switch keying (M-ASK)
wavelength-division multiplexing passive optical network (WDM-PON)
Opis:
Simultaneous providing services of ultra-wideband and wired signal over single wavelength can greatly decrease the complexity and reduce the costs of a wavelength-division multiplexing passive optical network. However, ultra-wideband signal occupies the spectrum range from 3.1 to 10.6 GHz, and a narrow idle frequency band (from 0 to 3.1 GHz) could be employed to transport wired signal with a limited rate. In this paper, we proposed a scheme to simultaneously provide ultra-wideband and wired services, in which the information rate of the wired signal is enhanced by employing a multi-level amplitude switch keying signal in the idle frequency band formed by ultra-wideband signal. In comparison with other advanced modulation formats used for wavelength-division multiplexing passive optical networks such as orthogonal frequency division multiplexing, multi-level amplitude switch keying signal can be easily received by using intensity modulation direct detection, which will greatly reduce the cost of end-users. Especially, if a multi-band ultra-wideband signal is substituted for the direct-sequence ultra-wideband signal, the available spectrum range to transport wired signal will be easily extended to 5 GHz as multi-band ultra-wideband signal has a narrower spectrum width and flexible center frequency, so 4-amplitude switch keying signal with a rate of 5 Gbaud will achieve an information rate of 10 Gbit/s.
Źródło:
Optica Applicata; 2015, 45, 4; 433-445
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Novel Structure and Design Optimization of Compact Spline-Parameterized UWB Slot Antenna
Autorzy:
Koziel, S.
Bekasiewicz, A.
Powiązania:
https://bibliotekanauki.pl/articles/221205.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
compact antennas
computer-aided design (CAD)
EM-driven design
UWB antennas
slot antennas
surrogate-based optimization
Opis:
In this paper, a novel structure of a compact UWB slot antenna and its design optimization procedure has been presented. In order to achieve a sufficient number of degrees of freedom necessary to obtain a considerable size reduction rate, the slot is parameterized using spline curves. All antenna dimensions are simultaneously adjusted using numerical optimization procedures. The fundamental bottleneck here is a high cost of the electromagnetic (EM) simulation model of the structure that includes (for reliability) an SMA connector. Another problem is a large number of geometry parameters (nineteen). For the sake of computational efficiency, the optimization process is therefore performed using variable-fidelity EM simulations and surrogate-assisted algorithms. The optimization process is oriented towards explicit reduction of the antenna size and leads to a compact footprint of 199 mm2 as well as acceptable matching within the entire UWB band. The simulation results are validated using physical measurements of the fabricated antenna prototype.
Źródło:
Metrology and Measurement Systems; 2016, 23, 4; 637-643
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis of Binary Group-Complementary Sequences
Autorzy:
Koshevyy, V.M.
Powiązania:
https://bibliotekanauki.pl/articles/116221.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
ultra wideband (UWB)
binary sequences
binary group-complementary sequences
complementary sequences
reduction of the number sequences
set of sequences
synthetized sequences
radar signals
Opis:
Algorithm of binary {-1, 1} group-complementary sequences direct construction for any sequences length N is suggested. On the base of these sequences the signals with very wide frequency bandwidth may be constructed (up to the ultra wideband (UWB) signals). Synthesized sequences may found their application in radar and communication.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2018, 12, 3; 545-548
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Localization System Supporting People with Cognitive Impairment and Their Caregivers
Autorzy:
Kolakowski, Jerzy
Djaja-Josko, Vitomir
Kolakowski, Marcin
Cichocki, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/225971.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
active and assisted living (AAL)
Bluetooth Low Energy
dementia
internet of things
localization
UWB
Opis:
Localization systems are an important component of Active and Assisted Living (AAL) platforms supporting persons with cognitive impairments. The paper presents a positioning system being a part of the platform developed within the IONIS European project. The system’s main function is providing the platform with data on user mobility and localization, which would be used to analyze his/her behavior and detect dementia wandering symptoms. An additional function of the system is localization of items, which are frequently misplaced by dementia sufferers. The paper includes a brief description of system’sarchitecture, design of anchor nodes and tags and exchange of data between devices.both localization algorithms for user and item positioning are also presented. Exemplary results illustrating the system’s capabilities are also included.
Źródło:
International Journal of Electronics and Telecommunications; 2020, 66, 1; 125-131
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An Ultra-Wideband System for Vehicle Positioning
Autorzy:
Kolakowski, J.
Cichocki, J.
Makal, P.
Michnowski, R.
Powiązania:
https://bibliotekanauki.pl/articles/226796.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
UWB
vehicle positioning
positioning systems
TDOA
Opis:
Systems supporting traffic safety require precise information on a vehicle position. The paper contains a proposal for a vehicle localization system based on ultra-wideband (UWB) technology. The system allows for vehicle positioning with submeter accuracy. The paper presents a system concept and an algorithm used for position calculation. The algorithm consists in selection of a system configuration in order to decrease the positioning uncertainty. The system concept was verified with a developed system demonstrator. The paper contains a description of the devices comprising the system. Exemplary results of outdoor demonstrator tests are included and discussed. The tests confirmed efficiency and attractiveness of the proposed solution.
Źródło:
International Journal of Electronics and Telecommunications; 2010, 56, 3; 247-256
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characterization of an aperture-stacked patch antenna for ultra-wideband wearable radio systems
Autorzy:
Klemm, M.
Troester, G.
Powiązania:
https://bibliotekanauki.pl/articles/307769.pdf
Data publikacji:
2005
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
ultra-wideband
UWB
ultra-wideband antennas
ultra-wideband communication
Opis:
This paper presents, for the first time, the time-domain characteristics of an aperture-stacked patch antenna (ASPA) for ultra-wideband (UWB) wearable devices. The methodology of antennas characterization for UWB radio systems is also outlined. The antenna operates within the 3-6 GHz frequency band. Time- and frequency-domain characteristics of this antenna are presented in transmission mode (Tx), receiving mode (Rx) and for 2-antenna (Tx-Rx) system. The pulse driving the antenna has duration of 0.65 ns. In the Tx mode, pulses radiated in different directions of the H-plane have very similar shapes. Fidelity factors are as high as 91.6-99.9%. For 2-antenna system, pulses received in normal and end-fire-like directions have the fidelity of 69.5%. As it was found, antenna does not behave "reciprocal" comparing Tx and Rx modes. For normal propagation direction, radiated pulse is the 2nd derivative of the input waveform, but in the Rx mode, received pulse is the 1st derivative of the incident plane wave. This antenna can be used for transmission of short-pulses, even 0.65-1 ns in duration. It is also small (patch planar dimensions 32/19 mm) and compact. Microstrip configuration allows further integration of active devices on the same board. Taking into account above results we can say that ASPA is a good candidate for UWB non-invasive wireless body area network (WBAN) applications.
Źródło:
Journal of Telecommunications and Information Technology; 2005, 2; 39-44
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Passive Mixer-based UWB Receiver with Low Loss, High Linearity and Noise-cancelling for Medical Applications
Autorzy:
Kareem, Thaar A.
Trabelsi, Hassen
Powiązania:
https://bibliotekanauki.pl/articles/2200699.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
WBAN
UWB receiver
LNA
passive mixer
linearity
port isolation
Opis:
A double balanced passive mixer-based receiver operating in the 3-5 GHz UWB for medical applications is described in this paper. The receiver front-end circuit is composed of an inductorless low noise amplifier (LNA) followed by a fully differential voltage-driven double-balanced passive mixer. A duty cycle of 25% was chosen to eliminate overlap between LO signals, thereby improving receiver linearity. The LNA realizes a gain of 25.3 dB and a noise figure of 2.9 dB. The proposed receiver achieves an IIP3 of 3.14 dBm, an IIP2 of 17.5 dBm and an input return loss (S11) below -12.5dB. Designed in 0.18μm CMOS technology, the proposed mixer consumes 0.72pW from a 1.8V power supply. The designed receiver demonstrated a good ports isolation performance with LO_IF isolation of 60dB and RF_IF isolation of 78dB.
Źródło:
International Journal of Electronics and Telecommunications; 2023, 69, 1; 61--67
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Miniaturized Spectacles Shaped Tapered Slotted Patch Antenna for UWB Applications
Autorzy:
Islam, M. T.
Samsuzzaman, M.
Mahmud, M. Z.
Powiązania:
https://bibliotekanauki.pl/articles/307753.pdf
Data publikacji:
2018
Wydawca:
Instytut Łączności - Państwowy Instytut Badawczy
Tematy:
patch antenna
tapered ground
UWB
wireless communication
Opis:
A compact planner patch ultra-wideband (UWB) antenna is presented in this paper. The antenna configuration consists of a spectacles-shaped patch and a slotted ground plane. Different parameters are investigated for improving the antenna’s properties and for achieving the preferred UWB band (3.1–10.6 GHz). The experimental and simulated results demonstrate that the proposed antenna acquires an operating bandwidth of 117% (3–11.5 GHz) with a stable omnidirectional radiation pattern, about 89% of average radiation efficiency and 4.2 dBi of average gain with the maximum of 5.7 dBi at 10.2 GHz.
Źródło:
Journal of Telecommunications and Information Technology; 2018, 1; 70-76
1509-4553
1899-8852
Pojawia się w:
Journal of Telecommunications and Information Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
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