Wyniki 1-2 spośród 2 dla zapytania: authorDesc:"Zeeshan QAMAR"

Planar monopole UWB antenna with 5GHz dual notched band characteristics

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These days most of the research work in the area of antenna design is focused on monopole antennas for UWB communications due to their high data rate, precision and low complexity. However, interference effect increases within the Ultra wide Band due to the increasing growth of 802.11a wireless LAN in the frequency band of 5 GHz in many countries. To minimize this closely found in-band interference effect, antennas with closely found notch band characteristics are becoming essential. The idea of band notch is extended in this paper by the placement of parasitic strips at different positions on the bottom of the substrate to achieve dual notches in 5 GHz band. Experimental results show that this technique can be employed to generate sharp controllable notch and/or dual notch bands with reasonable accuracy. Streszczenie. Przedstawiono projekt anteny do szerokopasmowej komunikacji w paśmie 5 GHz w sieciach bezprzewodowych standardu 802.11a. Właściwości anteny kształtowano przez dodanie dodatkowych pasków w różnych pozycjach. (Planarna jednobiegunowa antena UWB pracująca w paśmie 5 GHz) Keywords: monopole, Ultra-wide Band, Notched Band, Parasitic Strip. Słowa kluczowe: antenna szerokopasmowa, antenna planarna Introduction High data rate in wireless communication systems is focal feature upon which bunch of research ensue and persist. To enable these features wireless communication systems created momentous demands on antenna designer. The antenna designer has to consider that the antenna should be compact and in ease to integrate with the active devices. In 2002, the FCC authorized to employ Ultra wide band from 3.1 GHz to 10.6 GHz with the limited emission power spectrum [1, 2]. After that, different types of antennas were designed for ultra wide band applications [3- 11] and at the same time many challenges cropped up in designing ultra wide band antennas. One of the main problems in ultra wide band is the interference within the ban[...]

Planar Monopole Stair Case Antenna for Ultra-wide Band

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Planar monopole antennas are extensively used in many wireless communication applications due to their compact size, low weight and ease of integration with active devices. Many antennas with different band characteristics have been designed such as dual, multi, wide and ultra wide band. In this paper simple monopole antenna is proposed for Ultra wide band applications. The antenna is analysed for bandwidth increment with addition of linear multiple steps, mathematical model is also proposed. Simulation results show that the proposed design can be used for UWB applications with reasonable accuracy. Prototype of proposed design with measured results are also presented. Reasonable agreement is found between the simulated and measured results. Details of the proposed antenna design, simulated and measured results are presented and discussed. Słowa kluczowe. W artykule opisano prostą antenę mono-polarną w zastosowaniu do ultra-szerokich pasm przepustowych. Przedstawiono model matematyczny i analizę wzrostu przepustowości pod wpływem liniowych stopni mnożących. Wyniki badań symulacyjnych zostały zweryfikowane poprzez porównanie z pomiarami rzeczywistymi. (Płaska, mono-polarna antena schodowa do pasm ultra-wysokich). Keywords: Monopole Antenna,Ultra-wide Band, Stair case, Mathematical formulation. Słowa kluczowe: antena mono-polarna, pasma utra-wysokie, schody, formuła matematyczna. o szeroki Band, z karbem Band, pasożytnicze Gazy Introduction Planar monopole antennas are finding numerous applications in mobile and wireless communication due to their compact size, low weight and ease of fabrication and integration with active devices. However, inherent narrow band characteristics of monopole antennas have forced the researchers to explore and investigate the ways and means to enhance the bandwidth of UWB antennas while keeping the sizes as low as possible. Quite a few techniques as reported in [1,2] have been explored and applied to design[...]

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