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This paper has presents a novel design of compact monopole antenna fed by a coplanar waveguide (CPW) for dual-band applications that targeted to achieve the gain more than 1 dB. The proposed compact monopole antenna has been design only 20 × 35 mm in size. The monopole structure with two inverted U-shaped, L-shaped lateral and coplanar-way (CPW) feed line driven by 50 Ω on one side are designed with...
A design of modified H-shaped patch antenna with slots and modified ground plane is presented in this paper. H-patch configuration with modified ground plane is proposed to increase the directivity, bandwidth and reflection coefficient of antenna. The H-shape patch antenna is feed by transmission line. By giving extra slots on top of the patch, it can increase the reflection coefficient of antenna...
A dual-band antenna by use 2 × 2 patch array with L-slot is presented for simultaneously worldwide interoperability for Microwave Access (WiMAX) and wireless local area network (WLAN) application. This 2 × 2 Patch Array with L Slot Antenna is targeted to achieve the gain more than 2 dB for both frequencies by using array technique design. The antenna design structure has been modified by adding a...
In this paper, broadband inverted suspended linear polarized antennas with operating frequency at 2.4GHz for Wireless Local Area Network (WLAN) application are designed. Various shapes of slot are added on the inverted suspended rectangular patch to investigate the effect of the antenna performance. The antennas are designed by using L-probe amendment with inverted suspended rectangular patch, where...
The antenna performance in achieving better return loss, gain, and efficiency can be potentially worked out by adding Split Ring Resonator (SRR) slot to the antenna structure. Thus, this paper investigates the effect of SRR slot on a monopole antenna at wideband frequency ranged from 2.9GHz to 6.6GHz. All antenna designs involved in this paper is simulated using Computer Simulation Technology (CST)...
This paper investigates the effect of SRR slot on a monopole antenna with hybrid substrates. The antenna has been investigated by varying the position and the number of SRR slot. The antenna is designed by using a hybrid material substrate constructed by material FR4 and RO3006. The dielectric constant and thickness of both materials are 4.4 and 1.6mm respectively for the former as well as 6.15 and...
A broadband dual-polarized antenna operating at 2.4GHz for Wireless Local Area Network (WLAN) application is proposed. The proposed antenna is designed with two different polarizations, which are right-handed circular polarization (RHCP) and left-handed circular polarization (LHCP). This broadband dual-polarized antenna is designed with method of inverted suspended rectangular microstrip patch antenna...
In this paper, a broadband circular polarized antenna with operating frequency at 2.4GHz is proposed. The antennas are designed by using L-probe amendment with inverted patch by using suspended rectangular microstrip antenna (MSA) technique to improve the bandwidth until more than 200MHz. The characteristics of the antenna are analyzed, so that the antenna meets broadband operations at operating frequency...
The design FSS structure consists of square Frequency Selective Surface (FSS) structures placed on the FR4 and glass. The circular and square slot is added on the FSS to design and simulate by using the CST Microwave Studio software for 2.4 GHz and 5.2GHz based on industrial, scientific and medical bands (ISM) standard. The reflection (S11) and transmission (S21) of the design FSS structure is analyzed...
A 0.7 dB (min.) low noise figure PHEMT LNA at 5.8 GHz using an inductive drain feedback that is applicable to the WiMAX 802.16 standard. The amplifier uses FHX76LP superHEMT low noise FET. The Ansoft Designer was used during the design process. The low noise amplifier (LNA) produced the forward transfer gain (S21) of 43.74 dB. The return loss (S12), input reflection (S11) and output reflection (S22...
The design FSS structure consists of square loop FSS structures placed on the FR4 board and glass. The square loop FSS is designed and simulated by using the CST Microwave Studio software for 2.4 GHz based on industrial, scientific and medical bands (ISM) standard. The reflection (S11) and transmission (S21) of the design FSS structure is analyzed based on the six types of configuration that have...
This paper discussed the investigation on the effect of two main parameters of a circular polarized patch antenna by using stub technique. The results show that this technique can improve the performance of return loss and gain result of the patch antenna. The operating frequency of the proposed antenna is 2.4 GHz with 40 MHz of bandwidth and return loss is −40dB. The antenna had been designed and...
This paper presents the investigation on the effect of two main parameters of a circular polarized patch antenna by using notch technique. The results show that this technique can improve the performance of return loss and gain of the patch antenna. The operating frequency of the proposed antenna is 2.4GHz with 32.66MHz of bandwidth and return loss is −49.63dB. The antenna had been designed and simulated...
This technical paper present the design of circular patch with slanted rectangular slot (Design 1 and Design 2) and x-circular polarized with slanted rectangular slot (Design 3) by using single port at frequency 2.4GHz. For design 3, the combination of design 1 or design 2 by using quarter wave matching is introduced. The design simulated using Microwave CST software with dielectric constant dielectric...
The performances of the triple-band meandered dipole antenna backed by two different Artificial Magnetic Conductor (AMC) structures are discussed in this paper. Two kinds of AMC structures are presented namely rectangular-patch with rectangular slot and rectangular-patch with slotted rectangular and I-shaped slot. The AMCs are designed to operate at 0.92GHz and 2.45GHz. The performances of the antenna...
In this paper, feedforward neural network trained with the backpropagation algorithm is proposed to compress grayscale medical images. In this new method, a three hidden layer feedforward network (FFN) is applied directly as the main compression algorithm to compress an MRI image. After training with sufficient sample images, the compression process will be carried out on the target image. The coupling...
In this paper, feedforward neural network trained with Generalized Hebbian Learning rule is proposed to compress grayscale medical images. After training with sufficient sample images, the weights obtained during the training phase will be applied in the compression phase to extract out the principal components that contribute to the most variance in the image. Quantization and subsequently data coding...
Channel capacity is one of the important ways to analyze the performance of wireless communications system. This paper will examine the channel capacity of Multiple-Input Multiple-Output (MIMO) system based on spatial diversity. We investigate the channel capacity for various distance and spacing of both transmitter and receiver antenna. The investigations of channel capacity are included with different...
In this paper, a novel image compression algorithm is proposed by introducing the feedforward neural network (FFN) instead of the quantization block of a general image compression algorithm. In this new method, after the spatial information of the target image is transformed into the equivalent frequency domain, the FFN stores each of the transformed coefficients in the network synaptic weights. By...
A triple-band dipole antenna integrated with 0.92 GHz Artificial Magnetic Conductor (AMC) is presented. The AMC structure is called a high-impedance surface (HIS) structure and is useful as a ground plane to the dipole antenna. This structure can be used to prevent the degradation of tag and antenna performance caused by the conductive materials (metal objects) and to increase the antenna gain. This...
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