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.
PL
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.
2
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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.
PL
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.
3
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W artykule przedstawiono dwu- i czteroelementowy układ anten o wąskim strumieniu promieniowania, o częstotliwości rezonansowej 2,4 GHz oraz możliwości wykorzystania w przesyle sygnału.
EN
A dual and quad element antenna array resonating at 2.4 GHz with narrow beam is proposed in this paper. An intention to put forward this work is to make use of microstrip patch antennas in beamforming to form directional beams in analog and digital domains; reducing co-channel / multipath interferences and improving Quality of Service (QoS) for senor arrays and 3G wireless networks. The size of dual and quad element antenna array is 60 x 130 mm2 and 60 x 240 mm2 respectively. Simulations in HFSS (High Frequency Structure Simulator) showed least mutual coupling among adjacent elements and prototypes have been fabricated using FR4 to verify the efficiency of the presented work for IEEE 802.11b/g WLAN standards.
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