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1
Content available A Novel Compact Ultra-Wideband Planar Inverted-L Antenna For Wireless Application
Issa Iman Ben, Essaaidi Mohamed
International Journal of Electronics and Telecommunications
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2022
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Vol. 68, No. 1
35--40
EN
A novel compact Ultra-Wide-Band Planar Inverted-L antenna is presented and investigated in this paper. The proposed antenna consists of a square planar radiating element with a U-shaped slot. The radiating element is supported by a shorting wall, and fed by a single 50 Ohms characteristic impedance microstripe line, printed on the top of the FR-4 substrate. The ground plane of the antenna is printed on the other side of the substrate. The entire antenna occupies only a small volume of 20mm × 35mm × 4mm, and is capable of operating from 4.2GHz to 8.6GHz (68.75%) and offers a maximum gain of 5.24dB. Therefore, it is suitable for UWB systems and other wireless and mobile technologies and, thus, can be integrated into smartwatch, mobile phones, tablets and laptops. The design of this antenna was carried out using 3D software such as CST studio and Ansoft HFSS to compare and validate the results.
2
Content available remote Error reduction for static localization
Morawska Barbara, Lichy Krzysztof, Koch Piotr, Niedźwiedzki Jakub, Leplawy Marcin, Lipinski Piotr
Journal of Applied Computer Science
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2020
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Vol. 28, nr 1
7--37
EN
This article describes methods for reducing the position measurement error of ultra-wideband localization system - DecaWave TREK1000. The static localization accuracy of this system can achieve 10cm. The localization algorithm introduced in this paper can improve it up to 1 centimeter. We could achieve such good accuracy, thanks to experiments that were carried out in various environmental conditions. This allowed us to identify the nature of the measurement error and design the correct set of filters.
3
Lokalizacja osób w hybrydowym systemie BLE-UWB z automatycznym tworzeniem mapy radiowej
Kołakowski M.
Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne
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2018
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nr 6
269--272, CD
PL
W referacie przedstawiono koncepcję hybrydowego systemu lokalizacyjnego łączącego technikę ultraszerokopasmową z technologią Bluetooth Low Energy. W systemie tym lokalizacja jest wyznaczana za pomocą metody fingerprinting na podstawie pomiarów poziomu sygnałów Bluetooth nadawanych przez etykietę. Mapa radiowa wykorzystywana przez algorytm jest tworzona automatycznie podczas korzystania z systemu przy wsparciu podsystemu UWB. Referat zawiera opis koncepcji, wykorzystywanych algorytmów oraz wyniki badań eksperymentalnych.
EN
In the paper a concept of a hybrid positioning system combining UWB with Bluetooth Low Energy technology is presented. In the system, user’s location is derived with fingerprinting algorithm based on received signal strength measurements performed for Bluetooth signals transmitted by localized tag. Radiomap utilized by the algorithm is created automatically during system operation with the support of UWB subsystem. The paper includes concept and algorithms description and the results of experiments.
4
Content available Research on a scheme of generating ultra-wideband doublet signal based on the cross-gain modulation in a semiconductor optical amplifier
Zhang K., Shao J.
Optica Applicata
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2018
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Vol. 48, nr 1
127--135
EN
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.
5
Content available Multiple-ring Circular Arrayfor Ground-Penetrating Radar Applications : Basic Ideas and Preliminary Results
Vescovo R., Pajewski L.
Journal of Telecommunications and Information Technology
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2017
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nr 3
25--29
EN
In this paper, the possibility of using a multiple-ring circular array as an antenna array for Ground-Pene-trating Radar systems is investigated. The theory behind theproposed idea is presented. The preliminary numerical re-sults that are obtained suggest that the proposed congura-tion is promising. It allows achieving a wide frequency bandand low dynamic range ratio of excitations, thus simplifyingthe feeding network. Further interesting requirements maybe satised by exploiting a combination of deterministic andstochastic synthesis techniques to design the array.
6
Układ przedwzmacniacza do modułu ultraszerokopasmowej transmisji danych DW1000
Woźna K., Michnowski R.
Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne
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2016
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nr 6
221—224, CD
PL
W referacie przedstawiono koncepcję oraz wyniki badań wykonanego układu przedwzmacniacza zwiększającego zasięg transmisji ultraszerokopasmowej modułu nadawczo-odbiorczego DW1000 pracującego w kanale nr 5 w paśmie 6,25 – 6,75 GHz. Do budowy układu wykorzystano scalone układy mikrofalowe (klucze, wzmacniacz).
EN
In the paper there are presented a concept and results of research of built preamplifier which purpose is to increase range of ultra-wideband transmission of DW1000 transceiver. DW1000 works on channel no. 5 in 6,25 - 6,75 GHz frequency band. In order to build the device, integrated microwave circuits such as RF switches and amplifier were used.
7
Content available remote An Application of Canonical Decomposition to TDOA Estimation for 3D Wireless Sensor Network Node Localization
Jiang H., Liu C., Sun X.
Przegląd Elektrotechniczny
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2012
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R. 88, nr 9b
92-95
EN
In this paper, a time difference of arrival (TDOA) estimation algorithm is proposed by extending canonical correlation decomposition (CCD) to measure multipath delays for determining node positions in Ultra-wideband wireless sensor networks (WSNs). Multilateral localization based on 3D Chan algorithm is employed to solve the non-linear problems for performance improvement. The method can perform well in the environment with unknown noise. The effectiveness is validated by simulations and the effects of noise and the number of anchor nodes are analyzed.
PL
Przedstawiono algorytm TDOA (time difference of arrival) do określania wielościeżkowych opóźnień w szerokopasmowej bezprzewodowej sieci czujników. Metoda jest przydatna w środowisku o nieznanych szumach.
8
Content available remote Indoor positioning by ultrawide band radio aided inertial navigation
De Angelis A., Nilsson J. O., Skog I., Händel P., Carbone P.
Metrology and Measurement Systems
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2010
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Vol. 17, nr 3
447-460
EN
A research study aimed at developing a novel indoor positioning system is presented. The realized system prototype uses sensor fusion techniques to combine information from two sources: an in-house developed local Ultra-Wideband (UWB) radio-based ranging system and an inertial navigation system (INS). The UWB system measures the distance between two transceivers by recording the round-trip-time (RTT) of UWB radio pulses. Its principle of operation is briefly described, together with the main design features. Furthermore, the main characteristics of the INS and of the Extended Kalman Filter information fusion approach are presented. Finally, selected static and dynamic test scenario experimental results are provided. In particular, the advantages of the proposed information fusion approach are further investigated by means of a high dynamic test scenario.
9
Content available Characterization of an aperture-stacked patch antenna for ultra-wideband wearable radio systems
Klemm M., Troester G.
Journal of Telecommunications and Information Technology
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2005
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nr 2
39-44
EN
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.
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