The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In this paper, simulation study of single-sided castor leaf-shaped quasi-self-complementary antenna with dual band-rejection characteristics is presented for broadband applications. It provides broad impedance bandwidth of (2.2–13.0 GHz) which covers ultrawideband (UWB) spectrum and Bluetooth spectrums. Two different quarter-wavelength long resonators are used to reject overlapping WiMAX (3.3–3.8...
In this study a novel architecture of Ultra Wide Band generator is explained. This architecture is the major important component in the generator Ultra Wide band communications systems. The new generator is consists of oscillator, multiplier and triangular pulse generator. This new study of generator is consists by multiply the triangular pulse signal envelope with a sinusoidal signal in the aim to...
Outsourcing databases into cloud increases the need of data security. The user of cloud must be sure that his data will be safe and will not be stolen or reused even if the datacenters were attacked. The service provider is not trustworthy so the data must be invisible to him. Executing queries over encrypted data preserves a certain degree of confidentiality. In this paper, we propose an efficient...
In this paper, design of a low-profile, coplanar waveguide fed elliptical patch Super Wide Band (SWB) multiple input multiple output (MIMO) antenna for various applications are presented. Two planar elliptical patch antennas with Microstrip-feed are used as the elements of the MIMO antenna. PTFE (Polytetrafluoroethylene) is used as dielectric substrate whose relative permittivity is 3.5. The proposed...
A new compact UWB polarization diversity antenna with stepped CPW fed is investigated. The antenna comprises two identical monopoles that are printed on a low loss substrate with 7 mm spacing and are placed orthogonal to each other. Results indicate that the proposed antenna has not only ultra wide bandwidth (122.83%for port 1 and 124.95% for port 2), but also good port isolation above 22dBover the...
The designed micro-strip ultra-wideband (UWB) antenna is based on a travelling wave propagating along the tapered surface with a phase velocity less than the speed of light. It results in end-fire radiation with a good penetration and resolution characteristics. The designed antenna for microwave imaging (MI) works on a technique which requires the measurement of reflected electromagnetic waves by...
A very high efficiency Ultra wide band(UWB) hemispherical dielectric resonator antenna is simulated. The antenna is excited by commonly used feeding technique known as microstrip feeding. The dielectric resonator (DR) is inserted in the vertical edge of the substrate, which covers almost entire UWB bands(3.1 GHz to 10.6 GHz). A high impedance bandwidth of 3.74 GHz to 10.49 GHz is achieved in simulation...
In this paper, a compact printed monopole UWB antenna is presented, followed by various techniques for creating stop bands in order to mitigate interference between co-existing UWB systems. The antenna consists of a two-step beveled radiating patch and a reduced ground plane which accounts for good impedance matching from 3.1 GHz to 10.6 GHz. A wide bandwidth of 8.7 GHz is obtained between 3.5 GHz...
This paper presents a novel Ultra Wide Band (UWB) wearable textile antenna for body area networks. The proposed antenna consists of a hexagonal radiating patch and a partial ground plane. The substrate of the proposed antenna is made of Dacron fabric with permittivity 3. Ultra wide bandwidth is achieved by optimizing the geometry, introducing a square notch in the partial ground plane and introducing...
An ultra-wide band (UWB) miniaturized rectangular monopole antenna is designed and simulated for System in Package (SiP) application. Area constraint in the package and limited bandwidth are the main design parameters. A generalized design and optimization scheme is formulated. Following the approach, the optimized antenna is simulated and results are presented which show promising functionality of...
This paper, investigates a compact single band notched Ultrawideband (UWB) monopole antenna with a modified Hilbert Fractal Parasitic Resonator. The antenna exhibits an Ultra Wide bandwidth which ranges from 2.61GHz–13.22GHz. The parasitic resonator results in band notching the frequency range between 7.89–8.83 GHz which is assigned for X-band satellite communication systems. This antenna can be used...
In an interconnected power system, all the generators must run at an appropriate capacity to meet the demand in power. Loss of synchronism between the generators and/or too much frequency fluctuations may cause protective equipment to trip. Load frequency control (LFC) is necessary to balance the power generation and the load, by monitoring frequency and power changes between interconnected power...
A compact multiple-input-multiple-output (MIMO) antenna with two antenna elements having different operational bandwidth is proposed in this paper. The structure is a combination of UWB antenna operating from 3.1 to 10.6GHz and a narrow band antenna centred at 5.45GHz for WIFI applications (5.19–5.9 GHz) sharing same substrate. An array of Split Ring Resonators (SRR) and a metallic strip is placed...
A planar multilateral monopole antenna with rabbet structure for ultra-wideband (UWB) application is proposed and experimentally studied. By modified a rabbet structure on the multilateral patch, a UWB response has been is improved. The proposed antenna has wide impedance bandwidth from 2.4 GHz to more than 11 GHz with better than −10 dB return loss. The design is demonstrated assuming FR4 substrate...
In this paper, the design and fabrication of a dual-polarized planar ultra-wideband antenna array working in the range of 6–20GHz are presented. The array is comprised of tightly coupled printable dipoles and uses a dielectric cover layer to broaden the bandwidth. The antenna is fed through coaxial line and the feeding structure is carefully designed to ensure impedance matching, reduce the manufacturing...
A novel planar modified octagonal-shaped slot antenna for ultra-wideband (UWB) applications is presented. The antenna is based on the subtraction of metal areas which have the minimum current distributions on the surface of printed antenna. A rectangular slot employed in the octagonal patch is designed for realizing wider bandwidth. The optimized UWB antenna has a compact size of 45 × 32 × 1.6 mm3...
This paper has the objective of study the insertion of a Complementary Split Ring Resonator (CSRR) in the ground plane of a microstrip patch antenna. The return loss, radiation diagram and magnetic field are evaluated according to the variations performed in CSRR's dimension. A good agreement between capacitive effect and the different dimensions used could be observed and an antenna with an effective...
This paper presents the complete synthesis, 3D numerical analysis, construction and measurement of an Ultra wideband (UWB) planar monopole antenna. The antenna measurements showed good agreement with the predicted numerical results, for both scattering parameters and gain patterns.
This paper presents the analysis of CPW-fed trapezoidal monopole antenna added with parasitic elements and slot. The U slot applied on trapezoidal patch to investigate the effects of slot geometrical altering to the notch and operation frequency.
This paper describes a TEM horn for applications in Ultra Wide Band (UWB) Ground Penetration Radar (GPR), named DARHA (Disaster Assistance and Rescue Horn Antenna) for short. Two antennas were designed and built, with good performance in terms of bandwidth and directivity. Special care was taken with the baluns since the overall antenna performance, in terms of return loss, was strongly influenced...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.