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In this paper, a flexible I shaped stacked novel ultra wideband (UWB) antenna with defected and reduced ground resonant at 1.26 GHz with an impedance bandwidth of 1.278 GHz (1.0596 GHz to 2.3374 GHz) has been proposed which can be suitably employed for satellite reconnaissance, amateur radio, future soil moisture and sea surface salinity mission applications. The material employed for substrate is...
A new fractal like tree structure of circular patch antennas for multi-band and wide-band challenges in 5G technologies is presented in this paper. The elementary structure is shown in Fig. 1. The antenna is designed on low cost Rogers RT/duroid 5880 (tm) substrate fed by a 50-ohm micro-strip line. The antenna is simulated in High Frequency Structure Simulator Software (HFSS). The proposed antenna...
In this talk, we will present a wideband microstrip antenna in dual-layer substrates. As is well known that, conventional low-profile microstrip antennas have the drawback of their inherent narrow bandwidth characteristics. As a result, it seriously limited their usages in high data rate wireless transmission applications, such as high precision radar detection, multi-inputmulti- output (MIMO) systems...
The design and realization of a low-profile wideband dual-polarized patch antenna with high isolation and low cross polarization has been presented. The aperture-coupled antenna element has four layers of substrates. Two microstrip lines terminated with circular patches are printed on the backside of the bottom substrate for feeding the radiating patches, while on the other side is a ground plane...
In this paper a dipole-type RFID tag antenna is proposed and it can be used to detect the mechanical deformation of an object. When the tag antenna is attached to an object, the mechanical deformation of the object and the patch antenna will contribute to the frequency deviation. So we can research and test the impact of mechanical deformation of the RFID tag antenna on its resonant frequency to monitor...
A novel set of multilevel basis functions is proposed in this paper to improve the system matrix conditioning of the radiation problem for line-fed patch antenna. The proposed basis functions are formulated in a wavelet-like manner. As a result, they possess spatial resolutions and mutual orthogonality which are significant for a well conditioning of the system matrix. Compared with the conventional...
In this paper, the artificial dielectric material with anisotropic permittivity is proposed to lower the resonant frequency of square patch antenna. The anisotropic artificial dielectric material is applied to replace the dielectric material usually used for implementing the conventional square patch antenna. Here, the conventional square patch antenna which is designed based on TM10 resonance mode...
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...
A reconfigurable antenna based on liquid crystal technology is presented in this paper. It comprises of a 1×4 microstrip patch antenna array, LC-based inverted microstrip line (IMSL) phase shifters, and RF-feeding and biasing networks. Nematic LC (N-LC) cell is used as tunable substrates for both the microstrip patch antenna array and the phase shifters. The dielectric tensor of N-LC is controlled...
Microstrip patch antennas are the most common form of printed antennas in antenna community. Besides the advantages of the microstrip patch antennas they have some unwanted features as surface wave excitation. Similarly, electromagnetic bandgap (EBG) structures are drawn major attraction with their interesting features in electromagnetics and antenna community. These structures are periodic in nature...
Metasurfaces, also known as metafilms, have recently been developed by researchers for various applications that exploit their exotic electromagnetic characteristics which cannot be found in nature. These applications include compact filter designs, electromagnetic cloaking and illusion coatings, miniaturized waveguides, and many new types of antennas with enhanced functionalities. Specifically, metasurfaces...
A new device is presented in this paper. It is a new patch antenna structure based on a photovoltaic solar cell. Then, the cell can be used to collect photo-generated current as well as RF transmission. A simulation allows analyzing the performance of the antenna, with a silicon material, and testing their parameters such as the reflection coefficient S11, gain, directivity, and the radiated power.
In this letter, we proposed a new method to reduce mutual coupling of antenna array without adding additional space for the added structures, such as modified ground structure, metamaterial, and parasitic elements on the surface of antenna substrate. As an example, a compact two-element antenna array working at 5 GHz is designed. Two closed chip loop structures (CCLSs) around the two radiation patches...
This paper presents a patch antenna design with both high-gain and low-radar cross section (RCS) characteristic. A mushroom-like electromagnetic band gap (EBG) structure with a pair of symmetrical slots is applied to a traditional patch antenna. It is verified that, the currents on the slotted EBG is better induced in the direction perpendicular to the slots. Slot-EBG cells arranged in chessboard...
Metallic dampers in the bridge structures will suffer from a certain degree of deformation leading to a damage or destruction. To assess the deformation of metallic dampers and to decide whether to replace, a passive wireless strain sensor is needed. In this paper, we propose a scheme to design the passive wireless strain measurement system. We first investigate the possibility that a folded patch...
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...
High order harmonic may affect antenna performance, reduce antenna efficiency and cause electromagnetic interference. So suppression of the harmonic has been a focus issue in the field of antenna design. It is demonstrated that the photonic band gap (PBG) structure and defect ground structure (DGS) provide an effective way for suppressing high order harmonics of antenna. In this paper, a novel antenna...
A multi-band square patch antenna based on shorted pins and asymmetric-circular shaped slots is proposed for L-band and S-band communication applications. The desired bandwidth can be obtained by adjusting the positions of these shorted pins and asymmetric-circular shaped slots. Also, the positions of the asymmetric-circular shaped slots can be used for choosing the desired resonance frequencies....
In this research paper, a novel compact stacked patch array configuration which consists of two units with rotated horizontal slotted parasitic patch and an embedded Defective Ground Structure is designed. The effect of the rotation, slots, embedded DGS on the electrical performance and parameters of the antenna structure has been mathematically analyzed and studied. We found and numerically verified...
A novel design of a reconfigurable patch antenna using PIN diodes is proposed to achieve frequency reconfigurable The operating frequency is electronically tuned by changing the state of diodes. If all the diodes is on the current directly go through the switch and current patch will reduce and antenna resonates at higher frequency and diverse effect has been observed for OFF condition of the PIN...
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