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.
This paper presents a design of Y-shaped patch microstrip antenna, which has been achieved by inserting Y-shaped strip in circular hole in square patch microstrip antenna and it has been excited by using microstrip line feed technique. Y-shaped microstrip patch antenna is designed on a FR4 substrate of thickness 1.524mm with relative permittivity of 4.4 and mounted above the ground plane. The measured...
In this demonstrative work, rectangular microstrip patch antenna has been proposed. Teflon substrate having thickness of 4mm and dielectric constant of εr = 2.1 has been employed. The design and analysis of the proposed system has been carried out on Computer Simulation Technology (CST) Microwave Studio 2014. The proposed antenna has compact size, light weight. The proposed antenna ground and patch...
This paper presents a broadband, dual-polarized substrate integrated waveguide cavity-backed slot antenna. In this design, high-order cavity resonances are used to generate arbitrary levels of inclined linear polarization. The antenna can provide an adjustable inclined linearly polarized with an aspect ratio of Ex/Ey ranging from 0.11 to 0.69. The proposed antenna provides fractional impedance bandwidth...
The paper represents, a novel wideband rectangular shaped MPA with microstrip feed and a reduced ground. The substrate employed in the presented antenna design is extruded polystyrene (XPS) having low electric permittivity of 1.02 and thickness of 2 mm. The presented microstrip patch antenna has an impedance bandwidth of 1.69 GHz with resonant frequencies of 2.07 GHz and 2.77 GHz and impedance bandwidth...
Modern communication system demands compact devices that operate over a wide range of frequencies. These systems require minimum sized antennas. Two miniaturized spiral configurations (rectangular and circular) that offer wide bandwidth and multiband operation is proposed in this paper. The structures use spiral configuration to achieve size reduction and wideband/ multiband operation. The rectangular...
In this paper, a very small broadband circularly polarized planar antenna fed by coplanar waveguide is designed and fabricated. The antenna is composed of a beveled rectangular radiator patch, a square patch, two inverted L-shaped grounded strip lines, and two semicircles etched on ground. Additionally, to realize the circular polarization a new structure including two semicircles etched on ground...
In this paper, a kind of Ka-band Planar broadband slot-coupled antenna is introduced. In order to broaden the bandwidth, use E-shaped patch on the basis of the copper axial feed antenna. These two parallel slots is equivalent to two LC resonant circuits which has coupling effects. Meanwhile, slot on the ground. Through the simulation, the center frequency of the antenna is 29 GHZ and its relative...
A dual-broadband 2G/3G/LTE (4G) array antenna is proposed in the paper. The prototype of the antenna is composed of a lower-band (dipole) and an upper-band radiation unit (a pair of two folded dipole). Four lower-bands and six upper-band units are interleaved to array on H-plane for roof mounting on car top, depending on the gain and coverage tradeoffs. In terms of the criterion of S11 less than −10dB,...
A compact and wideband CPW-fed Quasi-Yagi antenna is proposed and experimentally demonstrated in this paper. Impedance, radiation, and gain characteristics of this antenna are presented, and a prototype antenna is fabricated and measured. The measured impedance bandwidth, defined by −10dB reflection coefficient, can reach an operating bandwidth of 97% from 3.41 to 9.84GHz, over which the antenna exhibits...
We have designed two end-fire antennas on LTCC with horizontal and vertical polarizations respectively. The antennas operate at 38GHz, a potential frequency for 5G applications. The horizontally-polarized antenna provide a broadband performance about 27% and 6dB end-fire gain and the vertically-polarized one provide a 12.5% bandwidth and 5dB gain. Both antenna are integrated under a compact substrate...
In this article, a super compact enhanced-bandwidth (EB) rat-race coupler (RRC) is initially proposed based on the combined technology of fractal geometry and lumped-element composite right/left handed transmission line (CRLH TL). The close-form broadband derivation and a set of design guideline for fractal implementation are provided which should be a reference value for future design. Fractal perturbation...
The microstrip wideband antenna has attracted much attention due to the applications of multiple wireless communication systems, such as the global positing system (GPS at 1.575 GHz), the digital communication system (DCS at 1.8 GHz), the international mobile telecommunications-2000 (IMT-2000 at 2.1 GHz), the wireless local area network (WLAN at 2.45 GHz), the long term evolution-2600 (LTE2600 at...
This manuscript represents the two half circular gap coupled disk patch antenna stacked with D.G.S. (Defected Ground Structure) for dual-wideband application. The antenna has an overall size of 40.0×40.0×1.6mm3 and gives the results of dual band performance. The proposed antenna can be used in military communication, wideband global satellite communication systems (WGS) (9.43–10.08 GHz) and in Airport...
The generation of continuous THz-waves by photomixing has several promising features, such as extremely-wide frequency tunability, very narrow linewidth, good frequency stability, and the ability to transmit high-frequency signals through low-loss optical fibers. To make such a scheme work effectively, we developed an InP/InGaAs uni-traveling-carrier photodiode (UTC-PD) [1, 2]. The UTC-PD has a unique...
A broadband aperture-coupled stacked patch array with a 45° polarization is presented. With the stacked patches and air layer structure being used, the elements' bandwidth and radiation efficiency are improved. The array achieves the 45°-polarization radiation through rotating the patches of each element. Experimental results show that a sound impedance match and stable radiation patterns are achieved...
Plane reflector is a two dimensional array which consists of apertures or patchesthis kind of reflectarray is always illuminated by a primary feed hornand then compensate the spatial phase delay by the elements printed on the surface. The main advantage of this structure is the main beam can be designed to tilt or scan a number of beamwidths away from its broadside direction. But the most significant...
In this paper, a novel X-band broadband single-layer unit cell with attached phase-delay lines for reflectarray antennas is proposed to surmount the limitation of the reflectarray bandwidth. The unit cell is composed of three circular rings, each with a pair of gaps which are mutually placed orthogonally, and two identical circular phase-delay lines are attached to the outer ring to provide the required...
A broadband center-fed reflectarray antenna is presented in this paper. Patch with slot ring on ground plane elements are used for bandwidth improvement. It is shown that quasi-linear phase responses with broad frequency band can be achieved by such a phasing element. An 11×11 elements reflectarray is designed and simulated. The results show that the simulated gain is 23.92 dB at the center frequency...
This paper presents a novel transmission line which has a constant phase shifter over a wide band, referenced to a uniform transmission line. The novel transmission line is loaded with lumped element. Compared with the conventional coupled line phase shifter, the configuration shows good performance with simplicity in both design and fabrication. And the use of lumped elements make the size more compact,...
A single-fed circularly polarized (CP) Radio Frequency Identification (RFID) reader antenna with a simple structure has been proposed for worldwide Ultra-High Frequency (UHF) band applications. The purpose of the antenna was to provide a low-cost and easy-fabricated solution with wide bandwidth and high performance. The proposed antenna is composed of a corner-truncated square driven patch with a...
Podaj zakres dat dla filtrowania wyświetlonych wyników. Możesz podać datę początkową, końcową lub obie daty. Daty możesz wpisać ręcznie lub wybrać za pomocą kalendarza.