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The design of a miniaturized CPW-fed rectangular slot antenna over reactive impedance substrate is proposed. Two-dimensional printed periodic circular metallic patches have been introduced on one side of the substrate for designing of reactive impedance substrate (RIS). Instead of conventional metal plate, arrays of periodic circular metallic patches are introduced as backed material for the lower...
A naval single band antenna presented is a combination of four element patches, printed on a substrate, for 3.4 GHz frequency operation. The array of antenna uses the ground at the bottom of substrate, a patch at top of substrate fed with proximity coupling. This array has a very simple structure; with size of 50∗50mmexcited by discrete port through proxy feeding, which is also having efficient radiator...
This paper presents the study on the effect of a rectangular slot defective ground structure on a rectangular microstrip patch antenna operating at 2.4 GHz. The rectangular microstrip antenna with rectangular defective ground structure(DGS) is simulated using HFSS software. The effect of defective ground structure on the rectangular microstrip patch antenna is observed by varying the length of the...
A new design of a microstrip antenna using Photonic Band Gap (PBG) substrate, with quasi-periodic symmetry is proposed. Antenna parameters such as return loss (S11), bandwidth, gain on the radiating element and electric field in the substrate were analyzed. The PBG structure proposed has distribution of air holes on a quasi-periodic mesh with symmetry 12 times applied to the dielectric substrate....
This paper presents a simple composite right/left-handed (CRLH) leaky-wave antenna (LWA) for continuous beam scanning from backward to forward direction through the boresight. The proposed CRLH LWA has the ability to scan the main beam from −40° to 40° by sweeping the operating frequency from 7.5 GHz to 10 GHz, with a boresight beam at 8.58 GHz. The peak gain of the antenna is 12.45 dBi and its 3dB...
A theoretical analysis of an annular ring microstrip antenna with metamaterial substrate is presented. The approach is based on the cavity model. By including in the substrate a conventional dielectric material and a metamaterial possessing negative permittivity and permeability, a frequency independent resonance condition is found. Numerical validation of the theoretical results is performed.
The objective of this work is to demonstrate and compare two solutions for increasing the bandwidth performance of cavity type antennas having an aperture size close to half the operating wavelength and placed in a large (infinite) ground plane. As an example, we chose a square cavity geometry with size 0.475 × 0.475 × 0.15 λ0 at 2.3 GHz. To excite the antenna, we placed inside the cavity volume first...
A new strategy for designing probe-fed electrically equivalent microstrip radiators based on their electrical dimensions is discussed in this article. Radiators on a Flame Retardant 4 (FR4) substrate are synthesized for equivalent performance, aiming at lower H-plane cross polarization over the bandwidth and resistive input impedance at the operating frequency. The effect of mutual coupling is analyzed...
A wideband stacked patch antenna is presented in this paper. The proposed antenna consists of a stacked structure and rectangular shell under the finite ground of the antenna. A 91.7% bandwidth is obtained by carefully arranging the relative permittivity of the substrates of the upper and lower layer. The proposed antenna is suitable for the modern communication systems.
A miniaturized differential dual-band antenna is presented. The dual-band operation is achieved by a square ring and a pair of fork-shaped strips. To improve the bandwidth of antenna, the packaging technique is introduced. The antenna has a compact size of 18mm×18mm. Simulated results show that the antenna can operate at 2.4 and 5.2 GHz for wireless local area network (WLAN), and the impedance bandwidths...
A novel single-layer wideband cavity-backed E-shaped microstrip patch antennais proposed. By cutting a U-slot on the E-shaped patch and introducing a rectangle metallic cavity backed on the substrate just under the patch, the proposed antenna can generatevery wide impedance bandwidths. Through a two-section microstrip line impedance transformer, the designed microstrip antenna is fed by a 50Ω coplanar...
In proposed work which has been analyzed and designed on IE3D tools, we cut a different types of slot like Lslot, Z-slot, U-slot and finally got the result at our desired frequency that is for 4G application at 2300MHz. In this research, we achieved multiband which is a essential parameter of wireless communication. The VSWR, Return loss, Bandwidth, Directivity, Gain is acceptable for this application...
The rapid progress in wireless communication systems and handheld terminal devices has made the implementation of small multi-band antennas one of the main technical challenges. The number of wireless systems in which multimode mobile terminals are required to operate has been growing constantly in recent years. Nowadays handheld terminal phones use various cellular bands (GSM850/900/1800/1900 + 3G/4G/5G),...
One of the important characteristics is the bandwidth of microstrip patch antenna. It can be significantly improved by using a variety of techniques. Multilayer based technique can improve the bandwidth of the patch antenna for various applications. In this paper, bandwidth enhanced frequency reconfigurable circular microstrip patch antenna (CPA) with variable air gap is presented. Microstrip patch...
A reconfigurable antenna covering three bands of frequencies WLAN, WiMAX, LTE Communication bands is designed. This antenna operates between these bands with the activation of two switches. The proposed antenna has small size and low profile design and occupies a volume of 18×20×0.5 mm3. The results include analysis of return loss and peak gain of antenna. High Frequency Structure Simulator (HFSS)...
In this paper Microstrip Patch antenna is designed in Ansoft HFSSV13. The designed antennas are double-sided printed microstrip patch antenna. The antenna is designed over the operating frequency is 2.4GHZ using the substrate material as FR4 which has the dielectric constant of 4.4(εr). The designed antenna can be used for ISM (industrial, scientific and medical) band and WLAN applications. The designed...
A miniaturized wideband patch antenna loaded with artificial ground structure is proposed and presented. The antenna structure is composed with slot loaded patch with the optimized artificial ground structure called reactive impedance surface (RIS). By introducing RIS below the patch the size of antenna reduced by 23.52% and bandwidth is increased by 78.26% as compared to the simple patch. Total impedance...
In this paper, the patch antenna with polarization reconfigurability feature is proposed. The antenna composed of circular patch on the top substrate embedded with four equal-length slits, and is fed at the diagonal of the structure using the coaxial fed technique. To obtain the reconfigurability feature, four switches (copper strips) are appropriately located at the specific position across the slit...
This paper presents the study of novel compact printed elliptical slot antenna with ultrawideband characteristics. The antenna is composed of microstrip line fed rectangular patch and U-shaped tuning stub. Various dielectric substrates are examined for the better performance and characteristics of proposed elliptic-al slot antenna. Return losses, surface current distributions, farfield radiation patterns...
High Voltage (HV) power apparatus are usually, the most critical and costly component in any power system. Sudden failure of such component leads to unwanted interruptions and catastrophic losses. Partial Discharges (PD) are reported as main reason for degradation of insulation system in any HV power apparatus. A successive occurrence of such discharges eventually leads to complete failure of the...
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