Abstract
In this research article, a simple and compact dual-band microstrip monopole antenna is discussed. A CPW feed is given to patch consisting of rectangular coplanar ground sheets on either side, truncated their centers with smaller rectangular sheets giving the shape of rectangular rings. The proposed antenna is designed using FR4 epoxy substrate having dielectric constant 4.4 and thickness 1.6mm. The main element in the antenna is four inverted L shaped stubs which govern the impedance bandwidth of the antenna. Simulations are carried out using HFSS software. The S11 plot for the proposed antenna showed dual-band characteristics with a lower band ranging from 1.09GHz to 2.33 GHz (1.24 GHz bandwidth) and the upper band covering 3.01 GHz to 10.738 GHz (7.728 GHz bandwidth). The proposed antenna bandwidth ranges of the proposed antenna will be covering the GPS, PCS and UMTS applications for lower band and UWB applications for upper band. The antenna exhibited a peak of 3.01 dB and 4.54 dB at 1.89 GHz and 9.45 GHz. Simulations are carried and all the important findings are plotted.
Highlights
Research in today’s modern wireless communications era has resulted in the development of devices simultaneously operating in multiple technologies utilizing different frequency bands
Microstrip patch antennas geometry consists of dielectric material
Simulations are done stage by stage in order to observe the improvement in the S11 plot
Summary
Research in today’s modern wireless communications era has resulted in the development of devices simultaneously operating in multiple technologies utilizing different frequency bands. Microstrip patch antennas have played a very significant role in this regard, as they prove vital in reducing the size of these devices. With advance technology these devices are able to operate on multiple bands, depending upon the requirement of the application. Many of the techniques used for designing dual-band antennas make use of certain approaches to manipulate the current distribution of one of the higher-order resonant modes of the structure. This changes the resonant frequency but it is responsible for a change in current distribution as well. In particular use of stubs is presented in [13] where the length of the inverted Lshaped stub (W + H) showed a significant affect on the impedance matching of the antenna
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