The investigations on stacked compact ring coupled rectangular microstrip antenna which are able to generate multiple resonant frequencies in the wireless communication bands, are reported. In these antennas by embedding various shapes of slots the size reduction is obtained. Also, the stacking on the ring‐coupled patch has been made to achieve wide bandwidth. The multifrequency nature of the stacked slotted patch is studied using IE3D software. The proposed antennas exhibits broadside radiation pattern. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:1387–1391, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26842

This article presents a compact wideband microstrip-fed planar monopole antenna composed of a rectangular patch and slotted ground structure. By placing pair of symmetrical square stubs, making slots in the stubs, putting stubs on the sides of the radiating patch, gives wide-band characteristics. The antenna only one of its kinds in structure, small in size and simple design due to less number of design parameters, compared with the existing UWB antennas in the literature. The bandwidth, radiation pattern and other antenna parameters are at acceptable level. IE3D method of moments based simulation software is used for design and analysis. The simulated results are confirmed by conducting experiments with the help of Rohde and Schwarz, German make ZVK model No. 8651 Vector Network Analyzer and discussed.

This paper presents design and development of 2 x 1 linearly polarized microstrip array antenna with Electromagnetic band gap (EBG) structure to improve bandwidth and suppression of back lobes in radiation pattern. The array elements are fed by corporate feed network, which improves the impedance bandwidth of the 2x1 rectangular microstrip array antenna by 8.342% and inclusion of EBG lattice reduces the back lobes in radiation characteristics. Experimental results for the array antennas in terms of return loss, radiation pattern, -3dB beam width, and suppression of back lobes are presented.

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