Serwis Infona wykorzystuje pliki cookies (ciasteczka). Są to wartości tekstowe, zapamiętywane przez przeglądarkę na urządzeniu użytkownika. Nasz serwis ma dostęp do tych wartości oraz wykorzystuje je do zapamiętania danych dotyczących użytkownika, takich jak np. ustawienia (typu widok ekranu, wybór języka interfejsu), zapamiętanie zalogowania. Korzystanie z serwisu Infona oznacza zgodę na zapis informacji i ich wykorzystanie dla celów korzytania z serwisu. Więcej informacji można znaleźć w Polityce prywatności oraz Regulaminie serwisu. Zamknięcie tego okienka potwierdza zapoznanie się z informacją o plikach cookies, akceptację polityki prywatności i regulaminu oraz sposobu wykorzystywania plików cookies w serwisie. Możesz zmienić ustawienia obsługi cookies w swojej przeglądarce.
Design and analysis of a moon slotted circular planar monopole UWB (ultra-wide band) antenna is discussed. The proposed antenna operates within a frequency spectrum of 2.62GHz to 12.63GHz, which includes the unlicensed band 3.1GHz-10.6GHz approved by FCC in 2002. It achieves a maximal peak gain of 4.85dBi at 9.75GHz and highest radiation efficiency of 95.94% at 3.1GHz. This antenna is mounted on a...
We show that dispersion characteristics of antenna patterns should be taken into account when developing systems using UWB signals. The accuracy of measurement of angular coordinates of objects using UWB pulses is increased by optimizing their shape based on known characteristics of the antenna system and at least partially known characteristics of the investigated signal source. Optimization algorithms...
In this paper, a new design Kite shape textile antenna is proposed for Ultra Wide Band (UWB) applications. Here defective ground structure is used, which leads to the UWB performance of the antenna. This antenna has jeans material as substrate. Kite shape textile antenna is designed with three different triangle shapes. The simulated Return loss, VSWR, fractional bandwidth and radiation pattern are...
In this paper, a MIMO antenna of size 52 × 35 × 1.6 mm3 for UWB applications is designed and analyzed. A separate ground plane antenna elements are set beside each other on top of FR-4 substrate. Each single antenna element is designed through varying the main six parameters that describe the super-formula. The antenna elements are fed through a microstrip feeding line. A full-wave simulator is used...
This paper presents a new design of compact coplanar waveguide (CPW)-fed patch antenna for UWB operation. The shape of the patch is obtained by choosing the six different parameters of the closed form superformula, resulting in a circular patch with sawtooth-like circumference. Simulation results demonstrate that the derived antenna operates in the FCC band (3.1–10.6 GHz) for UWB operation. In comparison...
New shape designs monopole antennas are investigated for ultra-wideband (UWB) applications in the K, Ka and Q bands (S11< −10dB). Reference antennas were studied before. The antennas size is about (40mm×40mm). Different shapes holes printed to the reference antennas are examined. This antennas are: simple square and circular used as references one and these reference with holes with different shapes...
A conformal elliptical tapered slot antenna has been designed and developed for urtrawideband (UWB) wireless communications. It is studied mounted on a cylindrical surface and is proven to operate equally well compared to its planar rival. Return loss, gain and E and H plane radiation pattern simulations are presented covering the whole ultrawideband. The antenna has demonstrated good performance...
In this paper, the design and analysis of a nature inspired UWB antenna is carried out. The contour profile of the antenna is obtained by setting the six different parameters of the super-formula. The antenna is microstrip-fed and mounted on compact size FR4 substrate of dimensions of 25 × 32 × 1.6 mm3. To improve the impedance bandwidth, a notch is cut from the ground plane and the edges are chamfered...
Dispersion properties of the mutual impedance of emitters significantly alter the shape and spectrum of ultra-wideband (UWB) signals which must be taken into account when forming the signal. In order to take into consideration mutual coupling of elements we propose to use pulse characteristics in the antenna performance analysis and calculations. This approach allows us to simplify calculations of...
This abstract presents the synthesis of a conformal timed array for optimum energy patterns during beam-scanning. The study presents a performance evaluation and a design example of the conformal timed array in a half cylinder shape with optimum true-time delays. The particle swarm optimization is used as the synthesis technique. Important remarks are given for designing a conformal timed array.
Ultra-Wideband antennas ranging from 3.1 to 10.6 Ghz, have gained increasing attention mainly because of the high data transmission rates, well beyond those possible with currently available technologies such as 802.11a, b, g, Wi-Max, etc. A UWB antenna with dual polarization is designed and simulated using ANSYS HFSS simulation software and its performance was analyzed. The proposed structure of...
In this work a circular and pyramidal shape monopole antennas are made reconfigurable using same technique. Both of the antenna structure with circular and pyramidal shape is simple and easy to construct. Two parasitic metallic elements were used which are co-planar to each other. The reconfigurability is achieved from 3 GHz to 9 GHz frequency band. Three ideal switches between two metallic strips...
A systematic design procedure for elliptical shape ground plane directional ultra-wideband (UWB) with circular patch antenna for microwave imaging applications is being presented here. The feed for the proposed directional ultra-wideband antenna is given by microstrip line due to its attractive features such as low cost, low profile and easy to fabrication. Further, the axis of elliptical ground plane...
In this paper, a microstrip fed spade shape planar monopole antenna for ultra wideband (UWB) applications is presented. Modified shapes of the lower edge of spade shape patch and the upper edge of ground plane are optimized. The experiment and simulation are well agreement. The proposed antenna provide broadband impedance matching, appropriate gain and stable radiation patterns over its operating...
An ultra-wide band (UWB) monopole antenna with a band-notch characteristic is presented which needs only two parameters to tune the notch frequency. The proposed monopole antenna is embedded with loading strip, whose length is determined by parametric study. By adjusting the loading strip length and width, the notched frequency bandwidth the antenna's operating bandwidth can be easily controlled....
This paper presents a new research in the field of timed antenna arrays. The study proposes the synthesis of timed antenna array for arbitrary shaped beam energy patterns. The synthesis is formulated as an optimization of the true-time delays and amplitude coefficients in order to obtain a desired mask and low side lobes. The optimization is by using the well-known particle swarm optimization. The...
In this paper, a compact planar Multiple Input Multiple Output antenna system of size 36 mm × 40 mm with two hexagonal monopole elements with L shaped slots is proposed. The UWB operation is achieved by a semicircular shaped Defected Ground Structure (DGS) and the shape of the DGS is optimized to get good return loss. Simulations are done with CST Microwave Studio. Simulated results show that the...
This paper presents a study of a new fractal antenna mounted on FR4 substrate with overall dimensions of 34×43mm2. The radiator geometry shape is achieved by using the concatenation between circular and rectangular shapes with four iterations juxtaposed. Two slots have been inserted in the ground planes which improve the matching of input impedance in the frequency range 2.79 – 11 GHz with a VSWR...
A microstrip antenna integrated with a frequency-controlled bandstop filter which is based on a second order filter is proposed in the paper. It works in the Fedral Comunication Commission (3.1–10.6GHz) with the notched band at the IEEE 802.11 standard for the frequency band of 5.15–5.85GHz. To do a description about the filtering capability of the notched-band antenna, a shape factor similar to that...
This paper proposes a frequency reconfigurable antenna system designed for cognitive radio applications. The antenna structure consists of a sensing antenna and a frequency reconfigurable antenna system. The sensing antenna scans the channel to discover frequency bands while the reconfigurable section is tuning to communicate within these bands. A reconfigurable antenna consists of five different...
Podaj zakres dat dla filtrowania wyświetlonych wyników. Możesz podać datę początkową, końcową lub obie daty. Daty możesz wpisać ręcznie lub wybrać za pomocą kalendarza.