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In this paper, the design and development of broadband, helical elements dipole antenna is presented. It offers higher gain compared to its conventional tubular elements counterpart of same physical dimensions. Both types of the dipole antennas, one with tubular elements and other with helical elements were constructed. These antennas were compared for their electrical parameters in the frequency...
A dual band RFID applications in 800 - 900 MHz and 2400 MHz band is presented. The Asymmetric Coplanar Strip (ACS) fed antenna consists of inverted L shaped monopole with a capacitive loading to provide necessary impedance matching and current distribution. The antenna has wide bandwidth from 790 MHz to 1050 MHz and from 2350 MHz to 2640 MHz coving the RFID UHF and Microwave frequencies. The uniplanar...
Digital broadcasting is the distribution of audio and/or video signals which transmit programs to an audience. The era of total digital broadcasting, from program production to digital receivers, will soon be upon us as a result of advances in image compression technology, higher integration and improved performance in LSI devices, and the rapid progress in digital technologies including the development...
This paper presents a modified loop capable of generating circular polarized wave at UHF, L and S bands. Modified loop comprise of loop and folded dipole antenna. The folded dipole was selected to ensure close loop as well as the introduction of N no. of folded dipoles for future research. Two modified loops for 3 and 5 radii were developed and tested. Simulated results were in agreement with practical...
In this paper, design and development of rectangular sleeve dipole antenna covering more than an octave bandwidth (850-2500 MHz) is presented with measured results. Here a rectangular box type of sleeve is proposed over the cylindrical dipole elements. This antenna is compact in size and covers more than 2.9:1 bandwidth with maximum VSWR 3:1. The antenna was first simulated using CSTtrade microwave...
A very practical radiator in the HF (3-30 MHz), VHF (30-300 MHz) and UHF (300-3000 MHz) is Yagi-Uda antenna. The radiation characteristics that are usually of interest in the Yagi -Uda antenna are the forward and backward gains, input impedance, bandwidth, front to back ratio, VSWR and magnitude of minor lobes. In this paper the 4-element Yagi-Uda antenna is investigated for the frequency of 435 MHz...
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