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Design and Analysis of Circular Notch Band DGS Monopole Antenna
Abstract
A configuration of circular notch band monopole antenna with DGS structure is demonstrated in the present article. The proposed MSP antenna is feed by microstrip line feeding with circular radiating element on top side of FR4 substrate and defected ground structure on the lower side. The basic circular monopole antenna is initially designed to operate in the wideband (2.5–12 GHz) and the modified proposed antenna is oriented to operate as notch band antenna (7.5–8 GHz). In order to attain single notch band characteristics, square shape slots in the ground plane are used. Better gain characteristics of 4.9 dB are realized by placing defected ground structure in the antenna model.
... The microstrip patch antennas are widely used in the cellular communications, in Global Position Satellite and in satellite links [3][4] [5]. The proposed antenna can be effectively usedbetween 3 GHZ to 9.24 GHZ frequencieswhich is a wireless application range. ...
This paper presents a wideband polarized antenna that is designed and analyzed for the cellular communication applications. The proposed antenna is designed with the coplanar wave guide feeding (CPW) by using the RT/ duroid 5880 material with a dielectric constant 2.2. It is observed that in the proposed model the return loss is -21.40dB for ungrounded CPW where as for the grounded CPW the loss is reduced to -39.13dB. The gain for the ungrounded CPW fed antenna is 2.95 dB and is enhanced to 3.2dB with grounded CPW structure. It is observed that there is an improvement in the bandwidth upto 6.03 GhZ for grounded CPW when DGS is applied. The antenna designing and simulation is done using ANSOFT HFSS software.
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