Study of Smart Antenna Wide Band Multi Beam by Algorithm Switch Beam

2019 ◽  
Vol 1 (2) ◽  
pp. 247-257 ◽  
Author(s):  
Yuliarman Saragih ◽  
Ibrahim ◽  
Agatha Elisabet
Keyword(s):  
Smart Antenna ◽  
Wide Band ◽  
Single Frequency ◽  
Phase Array ◽  
Frequency Allocation ◽  
Wideband Antennas ◽  
Single Beam ◽  
Rf Systems ◽  
Working Frequency ◽  
System Frequency

The use of wideband antennas in radio frequency (RF) systems are intended to improve the efficiency of the system economically. So that problems arise due to differences in RF system frequency allocation in each country can be overcome. Other than that, the need for an antenna that can optimize the direction of the beam becomes one which became a consideration, for that to develop a smart antenna that is capable of producing the different beam. In various studies, wideband antennas have been built only able to work on a single beam. Meanwhile, the antenna has also been proven to be working in multi-beam but still works on a single frequency. The researcher intends to develop an antenna that can work as a smart antenna that applies multi-beam with switching algorithms by having a wide working frequency (wideband). Multi-beam with wideband can be produced by combining wideband antenna array with a Butler matrix that applies the switching beam algorithm with phase array technique so that it can be a smart antenna because the antenna can be adjusted of the beam as desired.

scholarly journals Seabed Identification and Characterization Using Sonar

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Henry M. Manik
Keyword(s):  
Single Frequency ◽  
Single Beam ◽  
Sonar System ◽  
Mean Diameter ◽  
Backscattering Strength ◽  
Sonar Systems ◽  
Simple Analog ◽  
Identification And Characterization

Application of sonar technologies to bottom acoustics study has made significant advances over recent decades. The sonar systems evolved from the simple analog single-beam and single-frequency systems to more sophisticated digital ones. In this paper, a quantified sonar system was applied to detect and quantify the bottom echoes. The increasing of mean diameter is accompanied by a higher backscattering strength. From this study, identification and characterization using sonar is possible.

Bit Loading Algorithm of VSF-OFCDM Wireless Communication

2014 ◽  
Vol 539 ◽  
pp. 211-219
Author(s):  
Mao Tong Xu
Keyword(s):  
Wireless Communication ◽  
Wide Band ◽  
Wireless Channel ◽  
Total Power ◽  
Subcarrier Allocation ◽  
Frequency Space ◽  
Bit Loading ◽  
Power Limit ◽  
And Performance ◽  
System Frequency

In VSF-OFCDM wireless communication, wireless channel is divided into component channels with the same frequency space according to the frequency, and the carriers on component channels are mutually orthogonal. When there are enough subcarriers, the bandwidth efficiency of the system is close to nyquist limit, which can ensure the utilization ratio of system frequency. Therefore, under the premise of ensuring orthogonal division of channels, the channels received a secondary division according to data rate requirements and power limit of business to make the frequency resource fully used and makes the total power minimal, which realizes the optimal distribution of wireless-communication system resources. The secondary division is represented by bit loading algorithmthe best bit number of subcarrier allocation in symbol period. For the characteristics of wide-band multi-media services and granular division of VSF-OFCDM wireless communication, the subject proposes the idea of business-oriented subcarrier allocation, which means that the subcarriers are divided in symbol period with the business as the dominant. Based on the idea, the paper designs service-oriented bit loading algorithm of subcarrier, byte and power combined with distribution based on channel detection, and makes verification and performance analysis on the algorithm.

Single-Beam Z-Scan: Measurement Techniques and Analysis

1997 ◽  
Vol 06 (03) ◽  
pp. 251-293 ◽  
Author(s):  
P. B. Chapple ◽  
J. Staromlynska ◽  
J. A. Hermann ◽  
T. J. Mckay ◽  
R. G. Mcduff
Keyword(s):  
Beam Quality ◽  
Measurement Techniques ◽  
Optical Power ◽  
Single Frequency ◽  
Optical Nonlinearities ◽  
Single Beam ◽  
Optical Propagation ◽  
Experimental Parameters ◽  
And Control ◽  
Optical Power Limiting

The Z-scan technique is a popular method for measuring degenerate (single frequency) optical nonlinearities using a single laser beam. In order to perform reliable measurements, it is necessary to carefully characterize and control a number of experimental parameters, such as the beam quality, the power and temporal characteristics of the laser, the collection aperture size and position, the sample reflectivity, sample thickness and imperfections in the sample. Failure to control these parameters leads to inaccurate determinations of the nonlinearities. In this paper, we review the theory of Z-scan and examine each of these issues from experimental and theoretical viewpoints. This work will be of interest to anyone who performs Z-scan experiments and to those interested in optical power limiting and nonlinear optical propagation.

scholarly journals Design and Implementation of Super Wide Band Triple Band-Notched MIMO Antennas

2021 ◽  
Author(s):  
Bazil Taha Ahmed ◽  
Darío Castro Carreras ◽  
Eduardo Garcia Marin
Keyword(s):  
Frequency Band ◽  
Wide Band ◽  
Mimo Antenna ◽  
Mimo Antennas ◽  
A Value ◽  
Radiating Element ◽  
S Parameters ◽  
Different Shapes ◽  
Working Frequency ◽  
Triple Band

AbstractIn this article, a triple band-notched super-wideband (SWB) monopole antenna is designed and manufactured. The measured working frequency band (out of the filters working band) ranges from 2.5 to 20 GHz. A single radiating element is utilized to analyze and implement various MIMO antennas, with isolation between the antenna ports higher than 15 dB. Two parallel-fed elements SWB MIMO antenna and four parallel-fed elements SWB MIMO antennas are presented. Metallic barriers with different shapes are used to improve the isolation among ports from a low unacceptable value of 12 dB to a value higher than 20 dB within most of the working frequency band. S-parameters of the presented SWB MIMO antennas experimentally shows that antennas perform well up to 20 GHz, which is the highest frequency supported by the available Vector Network Analyzer used in the S parameters measurements. Satisfactory performance is observed up to 50 GHz by computer simulations using the CST software.

scholarly journals Experimental Validation of a Microwave Imaging Method for Shallow Buried Target Detection by Under-Sampled Data and a Non-Coperative Source

2021 ◽  
Author(s):  
Adriana Brancaccio ◽  
Giovanni Leone ◽  
Rocco Pierri ◽  
Raffaele Solimene
Keyword(s):  
Spatial Data ◽  
Horn Antenna ◽  
Test Site ◽  
Microwave Imaging ◽  
Single Frequency ◽  
Reference Plane ◽  
Imaging Method ◽  
Sampled Data ◽  
Working Frequency ◽  
Soil Interface

In microwave imaging it is often of interest to inspect electrically large spatial regions. In these cases, data must be collected over a great deal of measurement points which entails long measurement time and/or costly, and often unfeasible, measurement configurations. In order to counteract such drawbacks, we have recently introduced a microwave imaging algorithm which looks for the scattering targets in terms of equivalent surface currents supported over a given reference plane. While this method is suited to detect shallowly buried targets, it allows to independently process each frequency data, hence the source and the receivers do not need to be synchronized. Moreover, spatial data can be reduced at large extent, without incurring in aliasing artefacts, by properly combining single-frequency reconstructions. In this paper, we validate such an approach by experimental measurements. In particular, the experimental test site consists of a sand box in open air where metallic plate targets are shallowly buried (few cm) under the air/soil interface. The investigated region is illuminated by a fixed transmitting horn antenna whereas the scattered field is collected over a planar measurement aperture at a fixed height from the air-sand interface. The transmitter and the receiver share only the working frequency information. Experimental results confirm the feasibility of the method.

Identification of Patch Phase Array Antenna at 28GHz in Different Orientation for 5th Generation Wireless Application

2017 ◽  
Vol MCSP2017 (01) ◽  
pp. 17-22
Author(s):  
Simpal Kumari ◽  
Deepak Kumar Barik ◽  
Satyasis Mishra
Keyword(s):  
Radiation Pattern ◽  
Mobile Communication ◽  
Wide Band ◽  
Array Antenna ◽  
Phase Array ◽  
Current Generation ◽  
Microstrip Patch ◽  
Feeding Technique ◽  
Wireless Application ◽  
Cellular Mobile

In this paper a wide band microstrip patch for next generation of wireless communication is proposed with three different configuration of patch array are designed with different orientation and excitation phase at 28GHz for 5th generation application. To think the current generation of the cellular mobile communication the rapidly increasing number of mobile devices, voluminous data and higher data rate are pushing. The proposed antenna is benefited at 28GHz frequency band. For the matching between radiating patch and the microstrip feedline inset feeding technique is used. With different orientation the excitation are changed to study the radiation pattern of each patch array antenna. The parameter presented , ,radiation pattern ,gain, directivity after simulation using HFSS software. The designed antenna are able to operate at 28 GHz which is shown by simulation result.antenna1 provide beam shifting cover the angle up to 60,and antenna2 beam shifting cover the angle up to 47 while the antenna3 is 102.Based on the simulation result at 28GHz the proposed antenna can cover 5G requirements. the gain of antenna is 9.20 dB with a directivity 7.42 dB and a bandwidth of more than 3GHz is obtained.

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