Programmer, Election

International Journal of Computer Applications, 2014

In this paper, a simple half-wave dipole antenna has been designed and analyzed for wireless applications. Resonant frequency for the dipole antenna was 5 GHz and as a simulation tool CST Microwave Studio (MWS) has been used. After that the return loss curve, the VSWR and the farfield radiation patterns of the half-wave dipole antenna have been observed.

A half-wave wired dipole antenna has been designed for wireless applications at 1 GHz. It is used for Aeronautical radio navigation and other wireless applications. This design is simulated and analyzed using CST Microwave Studio (MWS).Gain of 2.1 dB within the frequency band is achieved.

2008

This paper proposed a performance simulation of a two-element, microstrip dipole array antenna for WLAN application. Simulation is done using two different simulation techniques, the circuit model (CM) derived from the transmission line model (TLM), and is compared with another simulation set using the Method of Moments (MoM). Both methods are simulated using Microwave Office. The basic microstrip dipole antenna is accurately modeled and the linear array structure is done by combining two basic units. Both simulation sets of MoM and CM are evaluated to determine their level of variation in terms of return loss (Su), bandwidth and resonant frequency (fres). The MoM designed for dipole antennas achieved the best return loss (Su), bandwidth and resonant frequency fres) at the desired frequency. The equivalent circuit proposed produced good return loss and comparable with simulation using MoMs. Details of the proposed antenna design and simulation results for 2.45 GHz WLAN band are presented and deliberated.

This paper deals with design and numerical analysis of a single Half-wave dipole antenna suitable for transmitting UHF television signals at a frequency of 235MHz using Method of Moment. Two equations, namely the radiating field and the electric field strength equations were used to determine the variations in the electric field strength and free space loss with distance in kilometers. Other parameters such as the power radiated, gain and voltage standing wave ratio of the antenna at this frequency were also evaluated. The radiation patterns obtained shows that the antenna is a good radiator while the variations in electric field strength and free space loss with distance actually show the distance covered and the rate of loss of the signal transmitted at this particular frequency using half –wave dipole antenna. 1. INTRODUCTION This work was motivated by a desire to improve on the performances of some antennas used for transmitting Television signals in some parts of south west region of Nigeria so as to enhance uniform distribution and higher efficient transmission of Television signals from base stations. The resulting analysis will enhance industry's ability to design antennas that will meet performance specifications and enable Television broadcasting stations to know the importance of design and analysis of antennas before they are employed in transmissions. In today's transmission systems, efficient antennas are required for transmission so as to produce high energy radiating signals that can be transmitted over a long distance for wide coverage before the signal is completely attenuated. An efficient radiating antenna coupled with high power transmitter will reduce the number of repeaters stations and eventually save cost of installations. Gautama A.K observed and reported that in order to ensure higher power radiation an antenna must have the ability to match the transmission line with the load impedance; it must also have the ability to transfer energy from electrostatic to electromagnetic energy or vice versa. In this study, the design and numerical analysis of a single short half-wave dipole Antenna suitable for transmitting at the same frequency as that of Nigeria television station NTA Ogbomosho (235MHz) is presented. Half – Wave dipole is chosen because of it wide acceptance in practice and its uses as a reference antenna. The characteristics of a Half-Wave dipole antenna in literature show that it has distributed capacitance and inductance which make it behave like a resonant circuit with voltage and current out of phase. Half – Wavelength dipole is one of the most commonly used antennas because its radiation resistance is 73 ohms, which is very near the 75-ohm characteristic impedance of some transmission lines, it matching to the line is simplified especially at resonance compare to other antennas. (Kennedy and Davis, 2005; Balanis, 2005). The diagram figure1 shows the transmitting antenna used for transmitting signal at a frequency of 235MHz in Nigeria Television Authority (NTA) station Ogbomosho, Oyo State, Nigeria. Ogbomosho is located on the latitude 8 0 08' 01" N and longitude 4 0 14' 48" E. This station transmits at frequency of 235MHz with a transmitters' power of 5kw but from information gathered from other cities and towns of about 40km away, it has been observed that the signals hardy reach 35km away from the base station before it is completely attenuated. I think this is the main reason why government has to install another Nigerian Television transmitting station in Oyo town which is just 47km away from Ogbomosho which could have been covered by the same base station if efficient antenna properly match with transmission line cable and powered by efficient transmitter is used for transmission. Though the role of free space path loss and other attenuation factors cannot be overlooked yet the importance of a well designed antenna in transmitting systems both at the transmitting and receiving ends cannot be underrated.

Radiation properties of a half wavelength dipole antenna, 2009

This paper is scientific material which highlights adaptive simulations using programme based applications like the c-language to analyze characteristics and behaviour of a virtual half wavelength dipole antennae .The paper relates programme based simulations to a real life antenna .Results show that the characteristics analyzed using virtual tools do not deviate from characteristics of a real planar antenna with a thickness that is zero(a strip of an antenna).The thinner model which is a better application may be used to vary the electromagnetic effects in the vertical and horizontal lobe of the halfwavelength dipole antenna

IRJET, 2020

A half-wave wired dipole antenna has been designed for wireless applications at 1 GHz. It is used for Aeronautical radio navigation and other wireless applications. This design is simulated and analyzed using CST Microwave Studio (MWS).Gain of 2.1 dB within the frequency band is achieved.

2019

In this research article, a comprehensive simulative work has been made to investigate the performance of a dipole antenna using two parameters: Permittivity and Radiation pattern. Firstly, a 1m Cu dipole antenna is designed to evaluate the performance. Secondly, to inspect the efficiency of the antenna, return loss, VSWR, reflection coefficient, mismatch loss and port current are taken into consideration. It is found form the simulative study that it provides near to zero effect on the considered characteristics in case of 2-4.5 permittivity of the antenna material. In this region of the permittivity, the port current remains constant and the value is around 0.01205A. The radiation pattern of the antenna has been noticed by changing frequency 7.494811 MHz to 134.9066 MHz. The simulation work is made by using Matlab2018a and Comsol Multi-Physics simulation software.

Today, the role of Human Resource Management (HRM) in building internal capabilities of an organization has become a subject of interest to academicians and practitioners.The purpose of this paper is to explore the influence of HRM practiceson organizational learning. It also attempts to explain the mediating role of organizational knowledge management capabilities.The paper attempt to focus on the perspective of integration of HRM, Knowledge Management (KM) and Organizational Learning (OL). A range of relevant literature on KMand OLare explored and a conceptual model is proposed and discussed. However, empirical data is needed to establish the influences of HRM practices on OL. HRM acts as 'Knowledge Facilitator' in the organization since it has the competencies and the capabilities to focus on the 'People' element of KM. KM integrates HRM directly into the value adding process of a business and enable HRM to justify its role as 'Strategic HR Business Partner'. The connection between KM and OL is inevitable because knowledge is what has been learned. In this context, this paper proposes an answer to 'how' HRM practices can stimulate and support employees to learn continuously as a part of everyday work with the intention of contributing to organizational KM and in turn OL.The study contributes to a relatively less researched area in HRM. This paper is useful for HR practitioners to directly contribute in Organization Development. The proposed conceptual framework is an original and complete model that will hopefully contribute for future work in the area.

Despre autor Anthony Robbins şi-a devotat mai mult de jumătate din viaţă pentru a ajuta oamenii să descopere şi să-şi dezvolte propriile calităţi. Considerat un lider al ştiinţei dezvoltării personale, a fondat numeroase companii dedicate asistenţei în atingerea desăvârşirii personale şi profesionale. Robbins a lucrat ca şi consultant pentru companii ca IBM, AT&T, American Express, McDonnel-Douglas, armata SUA, dar şi pentru echipe profesoniste ca Los Angeles Dodgers, Los Angeles Kings şi atleţi olimpici medaliaţi cu aur, şi un număr impresionant de figuri politice şi organizaţii comunitare. Robbins are ca scop o lume mai bună, prin ajutarea celorlalţi să devină căpitanii propriilor vieţi -stăpânirea relaţiilor de familie, orientarea spre scopuri sau eliberarea stress-ului emoţional sau financiar. De-a lungul anilor şi-a dedicat energia şi resursele celor care aveau nevoie, iar în 1991 a fondat o organizaţie non-profit pentru sprijinul copiilor defavorizaţi, al celor fără adăpost, al vârstnicilor şi deţinuţilor.